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  • 08:50 Test Anxiety: Crash Course Study Skills #8

    Test Anxiety: Crash Course Study Skills #8

    614 views / 0 likes - added

    Exams can be terrifying. It’s easy to feel like the weight of the world rests in these moments – like this one test determines your grades and, in turn, your whole future – even if you know, rationally, that this isn’t really the case. What’s worse is tha

  • 04:37 Popular Living Things Change: Crash Course Kids #41.1

    Living Things Change: Crash Course Kids #41.1

    1,329 views / 3 likes - added

    Have you ever heard of the Peppered Moth? It's a great example of how living things can change because their environment has changed. And it's not just them! There used to be giant insects roaming the world, but they got smaller through time because their

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  • 03:37 Popular Up, Up & Away: Crash Course Kids #16.2

    Up, Up & Away: Crash Course Kids #16.2

    1,014 views / 0 likes - added

    So... what makes the wind? You might be surprised to learn that it has to do with two of Earth's spheres; The Hydrosphere and the Geosphere. In this episode of Crash Course Kids, Sabrina takes us to the beach to chat about how the wind comes into being an

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  • 10:27 Popular Kant & Categorical Imperatives: Crash Course Philosophy #35

    Kant & Categorical Imperatives: Crash Course Philosophy #35

    994 views / 0 likes - added

    Our next stop on our tour of ethics is Kant’s ethics. Today Hank explains hypothetical and categorical imperatives, the universalizability principle, autonomy, and what it means to treat people as ends-in-themselves, rather than as mere means. Get your ow

  • 09:27 Early Programming: Crash Course Computer Science #10

    Early Programming: Crash Course Computer Science #10

    606 views / 0 likes - added

    Since Joseph Marie Jacquard’s textile loom in 1801, there has been a demonstrated need to give our machines instructions. In the last few episodes, our instructions were already in our computer’s memory, but we need to talk about how they got there - this

  • 10:10 Skyscrapers, Statics, & Dynamics: Crash Course Engineering #26

    Skyscrapers, Statics, & Dynamics: Crash Course Engineering #26

    276 views / 0 likes - added

    What if you were on a high floor of a skyscraper and the building started swaying? Today well explore statics and dynamics, and what they mean for the structures we design. We look at the idea of static equilibrium, forces, and torques, and how free body

  • 12:05 The Atomic Bomb: Crash Course History of Science #33

    The Atomic Bomb: Crash Course History of Science #33

    557 views / 0 likes - added

    The story picks up where we left off last time, with Einstein writing the president of his new homeland, the United States, urging him to build a nuclear weapon before Hitler. This is the tale of the most destructive force humans have ever unleashed. The

  • 09:04 Popular Electrochemistry: Crash Course Chemistry #36

    Electrochemistry: Crash Course Chemistry #36

    1,497 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 10:15 The Personal Computer Revolution: Crash Course Computer Science #25

    The Personal Computer Revolution: Crash Course Computer Science #25

    605 views / 3 likes - added

    Today we're going to talk about the birth of personal computing. Up until the early 1970s components were just too expensive, or underpowered, for making a useful computer for an individual, but this would begin to change with the introduction of the Alta

  • 10:36 Star Clusters: Crash Course Astronomy #35

    Star Clusters: Crash Course Astronomy #35

    579 views / 0 likes - added

    Last week we covered multiple star systems, but what if we added thousands or even millions of stars to the mix? A star cluster. There are different kinds of clusters, though. Open clusters contain hundreds or thousands of stars held together by gravity.

  • 24:28 Popular How To Draw Bon Bon L.O.L. Surprise Doll - Plus we open one!

    How To Draw Bon Bon L.O.L. Surprise Doll - Plus we open one!

    1,590 views / 2 likes - added

    Learn how to draw another LOL Surprise Doll! This time we're learning how to draw Bon Bon LOL! And be sure to stay for the very end, we're opening a brand new one...ahhhhhh! You can also visit the LOL official website here https://lolsurprise.mgae.com/

  • 10:27 Why Human Ancestry Matters: Crash Course Big History 205

    Why Human Ancestry Matters: Crash Course Big History 205

    504 views / 0 likes - added

    This week, Emily Graslie is teaching you about human ancestry and geneaology, how we got to be the species we are, and why that matters in our zoomed out look at Big History. For more information, visit the Big History Project: http://www.bighistoryprojec

  • 11:15 Web Search: Crash Course AI #17

    Web Search: Crash Course AI #17

    332 views / 0 likes - added

    Today were going to talk about search engines, which are just AI systems that try to help us find what were looking for. Search engines can be the sort that serve up a list of results, like during a Google or Bing search, using web crawlers, an inverted i

  • 12:47 The Mind/Brain: Crash Course History of Science #30

    The Mind/Brain: Crash Course History of Science #30

    288 views / 0 likes - added

    Scientists in the nineteenth century discovered a lot about life and matter. But exactly what kind of stuff is the human brain? That one wasand istricky.The brain scienceswith experiments and therapies tied to biological theories of the bodyemerged in the

  • 11:04 Chi-Square Tests: Crash Course Statistics #29

    Chi-Square Tests: Crash Course Statistics #29

    373 views / 0 likes - added

    Today we're going to talk about Chi-Square Tests - which allow us to measure differences in strictly categorical data like hair color, dog breed, or academic degree. We'll cover the three main Chi-Square tests: goodness of fit test, test of independence,

  • 04:00 Popular The Great Escape: Crash Course Kids #13.1

    The Great Escape: Crash Course Kids #13.1

    1,251 views / 2 likes - added

    Do you know how many people have been to the moon? Only 12! Part of the reason it's so few is because of how difficult it is to escape Earth and get into space in the first place. In this episode of Crash Course Kids, Sabrina talks about gravity, escape v

  • 13:30 Degrees of Freedom and Effect Sizes: Crash Course Statistics #28

    Degrees of Freedom and Effect Sizes: Crash Course Statistics #28

    403 views / 1 likes - added

    Today we're going to talk about degrees of freedom - which are the number of independent pieces of information that make up our models. More degrees of freedom typically mean more concrete results. But something that is statistically significant isn't alw

  • 13:16 Popular Absolute Monarchy: Crash Course European History #13

    Absolute Monarchy: Crash Course European History #13

    747 views / 0 likes - added

    So far, the rulers of Europe have been working to consolidate their power and expand their kingdoms, and this is it. The moment they've been working toward: Absolute Monarchy. We're going to learn about how kings and queens became absolute rulers in Europ

  • 11:39 100 Years of Solitude Part 1: Crash Course Literature 306

    100 Years of Solitude Part 1: Crash Course Literature 306

    641 views / 1 likes - added

    Our first of two episodes about Gabriel Garcia Marquez's novel, 100 Years of Solitude. This week, we're looking at the Buendia family, and their many generations of people with the same names. We'll also look at the fascinating way the author thinks about

  • 03:41 Popular Climate Change: Crash Course Kids #41.2

    Climate Change: Crash Course Kids #41.2

    1,413 views / 6 likes - added

    How does climate change? And what happens to environments and ecosystems when it does? In this episode of Crash Course Kids, Sabrina shows us the effects that climate change can have and how one small change in an ecosystem can throw everything off. Watch

  • 12:30 The Singularity, Skynet, and the Future of Computing: Crash Course Computer Science #40

    The Singularity, Skynet, and the Future of Computing: Crash Course Computer Science #40

    537 views / 0 likes - added

    In our SERIES FINALE of Crash Course Computer Science we take a look towards the future! In the past 70 years electronic computing has fundamentally changed how we live our lives, and we believe it’s just getting started. From ubiquitous computing, artifi

  • 11:39 Popular Copyright, Exceptions, And Fair Use: Crash Course Intellectual Property #3

    Copyright, Exceptions, And Fair Use: Crash Course Intellectual Property #3

    729 views / 0 likes - added

    Stan Muller teaches you a few things about copyright enforcement, and talks about the exceptions to copyright enforcement. While there are several, the one you've probably heard of is Fair Use, and it's a pretty tricky one. We'll try to explain it, and te

  • 13:04 Popular The Scientific Methods: Crash Course History of Science #14

    The Scientific Methods: Crash Course History of Science #14

    740 views / 0 likes - added

    Historically speaking, there is no one scientific method. Theres more than one way to make knowledge. In this episode we're going to look at a few of those ways and how they became more of the "norm."***Crash Course is on Patreon! You can support us direc

  • 03:53 Popular (LEGO) Block Party: Crash Course Kids #23.2

    (LEGO) Block Party: Crash Course Kids #23.2

    1,023 views / 0 likes - added

    Playing with LEGOS is fun. But, they can also teach us something about matter. In this episode of Crash Course Kids, Sabrina chats about chemical reactions and the Conservation of Matter. Watch More Crash Course Kids: https://www.youtube.com/user/crashcou

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  • 11:34 Climate Science: Crash Course History of Science #45

    Climate Science: Crash Course History of Science #45

    319 views / 0 likes - added

    Scientists tend to be careful and resistant to big claims. So evidence for the possible end of the living world took a while to be seen as such. In this episode of Crash Course History of Science, Hank talks to us about where Climate Science started and h

  • 09:24 The Impacts of Social Class: Crash Course Sociology #25

    The Impacts of Social Class: Crash Course Sociology #25

    568 views / 0 likes - added

    This week we are building on last week’s outline of American stratification to explore how class differences affect people’s daily lives. We’ll explore variations in everything from values & beliefs to health outcomes, and look at how these things can per

  • 03:12 Popular Defining Gravity: Crash Course Kids #4.1

    Defining Gravity: Crash Course Kids #4.1

    1,981 views / 7 likes - added

    So, if gravity pulls everything down, then why don't things on the bottom of the Earth get pulled down into space? In this episode of Crash Course Kids, Sabrina talks about gravity and explains that when we talk about gravity pulling things down, what we

  • 09:23 Popular Joints: Crash Course A&P #20

    Joints: Crash Course A&P #20

    976 views / 0 likes - added

    We continue our look at your bones and skeletal system, skipping over the silly kid's song in favor of a more detailed look at your your axial and appendicular skeleton. This episode also talks about the structural and functional classifications of your j

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  • 07:36 Popular How Voters Decide: Crash Course Government And Politics #38

    How Voters Decide: Crash Course Government And Politics #38

    732 views / 0 likes - added

    So today, Craig is going to try to get inside the heads of voters by discussing how voters make decisions. Now obviously, like all decision making, voter decisions are influenced by a multitude of factors, but the three we are going to focus on today (and

  • 10:52 Popular Orbitals: Crash Course Chemistry #25

    Orbitals: Crash Course Chemistry #25

    893 views / 0 likes - added

    In this episode of Crash Course Chemistry, Hank discusses what Molecules actually look like and why, some quantum-mechanical three dimensional wave functions are explored, he touches on hybridization, and delves into sigma and pi bonds. -- Table of Conten

  • 10:26 Exercise: Crash Course Study Skills #10

    Exercise: Crash Course Study Skills #10

    679 views / 0 likes - added

    We’re finally to the end of our time together here on Crash Course Study Skills, so this week we’re taking a more holistic approach to being the best learner you can. Part of taking care of your brain is taking care of your whole body, of which your brain

  • 11:19 The Cold War and Consumerism: Crash Course Computer Science #24

    The Cold War and Consumerism: Crash Course Computer Science #24

    592 views / 0 likes - added

    Today we’re going to step back from hardware and software, and take a closer look at how the backdrop of the cold war and space race and the rise of consumerism and globalization brought us from huge, expensive codebreaking machines in the 1940s to afford

  • 05:10 Popular Spaced Out: Crash Course Kids #25.1

    Spaced Out: Crash Course Kids #25.1

    759 views / 2 likes - added

    So... how big is the Universe? It's big... really big... no, bigger than that... it's big. In this episode of Crash Course Kids, Sabrina gives us some perspective on this whole Universe thing and how we fit into it. Watch More Crash Course Kids: https://w

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  • 11:38 Popular The Central Processing Unit (CPU): Crash Course Computer Science #7

    The Central Processing Unit (CPU): Crash Course Computer Science #7

    1,141 views / 0 likes - added

    Take the 2017 PBS Digital Studios Survey: http://surveymonkey.com/r/pbsds2017. Today we’re going to build the ticking heart of every computer - the Central Processing Unit or CPU. The CPU’s job is to execute the programs we know and love - you know like G

  • 09:28 Popular Stock Market Crash of 1929: The Great Depression

    Stock Market Crash of 1929: The Great Depression

    934 views / 1 likes - added

    History and lessons from the 1929 stock market crash.

  • 11:32 Popular OCD&Anxiety Disorders: Crash Course Psychology #29

    OCD&Anxiety Disorders: Crash Course Psychology #29

    906 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 10:54 Popular Intro to Psychology - Crash Course Psychology #1

    Intro to Psychology - Crash Course Psychology #1

    1,014 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 09:20 Popular Lymphatic System: Crash Course A&P #44

    Lymphatic System: Crash Course A&P #44

    1,691 views / 0 likes - added

    Today Hank explains your unsung lymphatic system and how it supports cardiovascular function by collecting, filtering, and returning interstitial fluid back into the bloodstream via a system of lymphatic vessels. He also explains the system’s major role i

  • 14:04 Popular American Imperialism: Crash Course US History #28

    American Imperialism: Crash Course US History #28

    1,409 views / 0 likes - added

    In which John Green teaches you about Imperialism. In the late 19th century, the great powers of Europe were running around the world obtaining colonial possessions, especially in Africa and Asia. The United States, which as a young country was especially

  • 12:07 Einstein's Revolution: Crash Course History of Science #32

    Einstein's Revolution: Crash Course History of Science #32

    338 views / 0 likes - added

    There was physics before Einstein in the same way that there was biology before Darwin. Einstein didnt just add some new ideas to physics. And he didnt just add a unifying framework for doing physics, like Newton. Einstein took what people thought was phy

  • 11:04 Why Star Stuff Matters: Crash Course Big History 202

    Why Star Stuff Matters: Crash Course Big History 202

    578 views / 0 likes - added

    So, the stars made the elements, we're all made of star stuff, etc. But what does all this mean? This week Emily Graslie teaches you how the formation of chemical elements in the bellies of the earliest stars made life as we know it possible. Namely, we'l

  • 10:38 Popular The Skeletal System: Crash Course A&P #19

    The Skeletal System: Crash Course A&P #19

    2,037 views / 3 likes - added

    Today Hank explains the skeletal system and why astronauts Scott Kelly and Mikhail Kornienko are out in space studying it. He talks about the anatomy of the skeletal system, including the flat, short, and irregular bones, and their individual arrangements

  • 12:29 Training Neural Networks: Crash Course AI #4

    Training Neural Networks: Crash Course AI #4

    315 views / 0 likes - added

    Today were going to talk about how neurons in a neural network learn by getting their math adjusted, called backpropagation, and how we can optimize networks by finding the best combinations of weights to minimize error. Then well send John Green Bot into

  • 01:41 World's First Coffee-Making Refrigerator: GE sets world record

    World's First Coffee-Making Refrigerator: GE sets world record

    671 views / 1 likes - added

    NEW YORK, NY, USA -- The $3,300 GE Café series refrigerator features a Keurig (GMCR) K-Cup brewer that uses the fridge's filtered water to make a single cup of coffee, thus setting the world record for the World's First Coffee-Making Refrigerator, accordi

  • 09:51 Popular Patents, Novelty, And Trolls: Crash Course Intellectual Property #4

    Patents, Novelty, And Trolls: Crash Course Intellectual Property #4

    1,417 views / 0 likes - added

    This week, Stan teaches you about patents. It turns out, they're patently complicated! So, patents have some similarity to copyright, in that they grant a limited monopoly to people who invent things. The key difference in patents and copyright is that pa

  • 04:16 Popular The Basics Of Freshwater: Crash Course Kids 14.1

    The Basics Of Freshwater: Crash Course Kids 14.1

    1,983 views / 6 likes - added

    We have a lot of water on Earth, but we also can't actually drink much of it... or use it for farming. That's because most of the water on Earth is saltwater. We humans, like a lot of living things, need freshwater to survive. In this episode of Crash Cou

  • 15:54 Popular Napoleon Bonaparte: Crash Course European History #22

    Napoleon Bonaparte: Crash Course European History #22

    1,130 views / 5 likes - added

    We try not to get into too much great man history here at Crash Course, but we have to admit: Napoleon Bonaparte is a pretty big deal. Join us as we track the rise, further rise, fall, rise, fall, mortal fall, and posthumous rise of Napoleon. This guy cha

  • 15:15 Popular The 1960s in America: Crash Course US History #40

    The 1960s in America: Crash Course US History #40

    925 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th

  • 10:01 Popular Utilitarianism: Crash Course Philosophy #36

    Utilitarianism: Crash Course Philosophy #36

    1,116 views / 1 likes - added

    Our next stop in our tour of the ethical lay of the land is utilitarianism. With a little help from Batman, Hank explains the principle of utility, and the difference between act and rule utilitarianism. Get your own Crash Course Philosophy mug or Chom Ch

  • 03:49 Popular Constellation Location: Crash Course Kids #31.2

    Constellation Location: Crash Course Kids #31.2

    949 views / 2 likes - added

    Let's say you're looking for a specific constellation in the sky, but can't find it? That could be because you're on the wrong part of the planet to see it. In this episode of Crash Course Kids, Sabrina talks about how the Earth's rotation and axis can af

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  • 08:59 Studying for Exams: Crash Course Study Skills #7

    Studying for Exams: Crash Course Study Skills #7

    497 views / 0 likes - added

    It turns out that saving all of your studying until after midnight on the night before your big exam is not actually a great way to prepare. Today, Thomas explains some test prep strategies that actually work. Crash Course is made with Adobe Creative Clou

  • 10:10 Popular Introduction To Intellectual Property: Crash Course IP 1

    Introduction To Intellectual Property: Crash Course IP 1

    825 views / 0 likes - added

    This week, Stan Muller launches the Crash Course Intellectual Property mini-series. So, what is intellectual property, and why are we teaching it? Well, intellectual property is about ideas and their ownership, and it's basically about the rights of creat

  • 12:48 Popular Compression: Crash Course Computer Science #21

    Compression: Crash Course Computer Science #21

    1,396 views / 0 likes - added

    Get your first two months of CuriosityStream free by going to http://curiositystream.com/crashcourse and using the promo code “crashcourse”. So last episode we talked about some basic file formats, but what we didn’t talk about is compression. Often files

  • 11:30 Popular Why Human Evolution Matters: Crash Course Big History 204

    Why Human Evolution Matters: Crash Course Big History 204

    709 views / 0 likes - added

    This week on Crash Course Big History, Emily is talking about process of human evolution, and the knack for innovation that has allowed humans to become so dominant on the Earth. Human innovation, and the ability to build on those innovations generation a

  • 15:29 The French Revolution: Crash Course European History #21

    The French Revolution: Crash Course European History #21

    529 views / 0 likes - added

    In 1789, the French Monarchy's habit of supporting democratic popular revolutions in North America backfired. Today, we're talking about the French Revolution. Across the world, people were rising up to throw off monarchies, and Louis didn't see the writi

  • 09:22 Popular Respiratory System, Part 1: Crash Course A&P #31

    Respiratory System, Part 1: Crash Course A&P #31

    1,255 views / 2 likes - added

    So we all know that breathing is pretty important, right? Today we're going to talk about how it works, starting with the nameless evolutionary ancestor that we inherited this from, and continuing to the mechanics of both simple diffusion and bulk flow, a

  • 10:57 Popular Equilibrium: Crash Course Chemistry #28

    Equilibrium: Crash Course Chemistry #28

    1,195 views / 0 likes - added

    In this episode of Crash Course Chemistry, Hank goes over the ideas of keeping your life balance... well, your chemical life. Equilibrium is all about balance and today Hank discusses Chemical Equilibrium, Concentration, Temperature, and Pressure. Also, h

  • 05:00 Popular H2O-NO! - Fresh Water Problems: Crash Course Kids #33.1

    H2O-NO! - Fresh Water Problems: Crash Course Kids #33.1

    1,106 views / 2 likes - added

    What happens to a single ecosystem when the amount of freshwater available in it changes? Not really much good. In this episode of Crash Course Kids, Sabrina talks about ecosystems and how one small change can lead to a cascade effect in the entire ecosys

  • 03:45 Popular Measurement Mystery: Crash Course Kids #9.2

    Measurement Mystery: Crash Course Kids #9.2

    1,060 views / 0 likes - added

    So now that we know what Properties are, how can we use them to figure things out? In this episode of Crash Course Kids, Sabrina uses them to solve the mystery of what she tripped over last night. This first series is based on 5th grade science. We're sup

  • 12:59 Graphical User Interfaces: Crash Course Computer Science #26

    Graphical User Interfaces: Crash Course Computer Science #26

    662 views / 0 likes - added

    Today, we're going to discuss the critical role graphical user interfaces, or GUIs played in the adoption of computers. Before the mid 1980's the most common way people could interact with their devices was through command line interfaces, which though ef

  • 12:51 Big Data Problems: Crash Course Statistics #39

    Big Data Problems: Crash Course Statistics #39

    425 views / 0 likes - added

    There is a lot of excitement around the field of Big Data, but today we want to take a moment to look at some of the problems it creates. From questions of bias and transparency to privacy and security concerns, there is still a lot to be done to manage t

  • 04:33 Popular Weather Vs. Climate: Crash Course Kids #28.1

    Weather Vs. Climate: Crash Course Kids #28.1

    2,313 views / 5 likes - added

    So we have Weather and Climate... but are they the same thing? No, no they are not. But they are both super important to how the geosphere is shaped. In this episode of Crash Course Kids, Sabrina chats with us about the differences between Weather and Cli

  • 03:43 Popular What On Earth: Crash Course Kids #10.1

    What On Earth: Crash Course Kids #10.1

    1,306 views / 2 likes - added

    We've already talked about how the Earth is divided into four spheres (The Hydrosphere, the Biosphere, the Geosphere, and the Atmosphere). But, how do these different sphere interact with each other? In this episode of Crash Course Kids, Sabrina chats wit

  • 10:24 Popular Digestive System, Part 3: Crash Course A&P #35

    Digestive System, Part 3: Crash Course A&P #35

    932 views / 1 likes - added

    Nachos are great...if you are among the lucky ones whose body can digest them. When digestion goes according to plan, the small intestine performs most of your chemical digestion in the duodenum, while accessory organs including the liver, gallbladder, an

  • 11:27 Popular The Normal Distribution: Crash Course Statistics #19

    The Normal Distribution: Crash Course Statistics #19

    1,168 views / 0 likes - added

    Today is the day we finally talk about the normal distribution! The normal distribution is incredibly important in statistics because distributions of means are normally distributed even if populations aren't. We'll get into why this is so - due to the Ce

  • 10:25 Popular Endocrine System, Part 1 - Glands & Hormones: Crash Course A&P #23

    Endocrine System, Part 1 - Glands & Hormones: Crash Course A&P #23

    1,946 views / 0 likes - added

    Hank begins teaching you about your endocrine system by explaining how it uses glands to produce hormones. These hormones are either amino-acid based and water soluble, or steroidal and lipid-soluble, and may target many types of cells or just turn on spe

  • 14:28 1984 by George Orwell, Part 1: Crash Course Literature 401

    1984 by George Orwell, Part 1: Crash Course Literature 401

    615 views / 1 likes - added

    In which John Green returns for a dystopian new season of Crash Course Literature! We're starting with George Orwell's classic look at the totalitarian state that could be in post-war England. Winston Smith is under the eye of Big Brother, and making us t

  • 09:55 Popular Work, Energy, And Power: Crash Course Physics #9

    Work, Energy, And Power: Crash Course Physics #9

    1,383 views / 0 likes - added

    When you hear the word, "Work," what is the first thing you think of? Maybe sitting at a desk? Maybe plowing a field? Maybe working out? Work is a word that has a little bit of a different meaning in Physics and today, Shini is going to walk us through it

  • 11:31 Precipitation Reactions: Crash Course Chemistry #9

    Precipitation Reactions: Crash Course Chemistry #9

    674 views / 0 likes - added

    A lot of ionic compounds dissolve in water, dissociating into individual ions. But when two ions find each other that form an insoluble compound, they suddenly fall out of solution in what's called a precipitation reaction. In this episode of Crash Course

  • 09:32 Contractarianism: Crash Course Philosophy #37

    Contractarianism: Crash Course Philosophy #37

    673 views / 0 likes - added

    Today we explore the penultimate ethical theory in this unit: contractarianism. Hank explains Hobbes’ state of nature, and implicit and explicit contracts, as well as the Prisoner’s Dilemma, and the benefits, and costs, of violating contracts. Get your ow

  • 10:56 Unsupervised Machine Learning: Crash Course Statistics #37

    Unsupervised Machine Learning: Crash Course Statistics #37

    335 views / 0 likes - added

    Today we're going to discuss how machine learning can be used to group and label information even if those labels don't exist. We'll explore two types of clustering used in Unsupervised Machine Learning: k-means and Hierarchical clustering, and show how t

  • 09:26 Popular Artificial Intelligence & Personhood: Crash Course Philosophy #23

    Artificial Intelligence & Personhood: Crash Course Philosophy #23

    744 views / 0 likes - added

    Today Hank explores artificial intelligence, including weak AI and strong AI, and the various ways that thinkers have tried to define strong AI including the Turing Test, and John Searle’s response to the Turing Test, the Chinese Room. Hank also tries to

  • 16:34 Expansion and Consequences: Crash Course European History #5

    Expansion and Consequences: Crash Course European History #5

    410 views / 0 likes - added

    European exploration had a lot of side effects. When the Old World and the New World began to interact, people, wealth, food, animals, and disease began to flow in both directions. In the New World, countless millions were killed by smallpox, measles, and

  • 11:28 Reinforcement Learning: Crash Course AI#9

    Reinforcement Learning: Crash Course AI#9

    359 views / 1 likes - added

    Reinforcement learning is particularly useful in situations where we want to train AIs to have certain skills we dont fully understand ourselves. Unlike some of the techniques weve discussed so far, reinforcement learning generally only looks at how an AI

  • 10:04 Popular The Problem Of Evil: Crash Course Philosophy #13

    The Problem Of Evil: Crash Course Philosophy #13

    728 views / 0 likes - added

    After weeks of exploring the existence of nature of god, today Hank explores one of the biggest problems in theism, and possibly the biggest philosophical question humanity faces: why is there evil? -- Images and video via VideoBlocks or Wikimedia Commons

  • 05:10 Popular Glow On: Crash Course Kids #20.2

    Glow On: Crash Course Kids #20.2

    1,077 views / 3 likes - added

    So, have you ever wondered why some stars are brighter than others? You might think it's because they're closer to us, but that's not the whole story? In this episode of Crash Course Kids, Sabrina chats about how stars glow and how astronomers judge their

  • 15:23 Supervised Learning: Crash Course AI #2

    Supervised Learning: Crash Course AI #2

    318 views / 0 likes - added

    Today were going to teach John Green Bot how to tell the difference between donuts and bagels using supervised learning! Supervised learning is the process of learning WITH training labels, and is the most widely used kind of learning with it comes to AI

  • 03:25 Popular Fabulous Food Chains: Crash Course Kids #7.1

    Fabulous Food Chains: Crash Course Kids #7.1

    1,441 views / 4 likes - added

    Everyone eats, right? But how does that food get the energy to power you? In this episode of Crash Course Kids, Sabrina talks about the way energy moves, or flows, through an ecosystem and how that movement forms Food Chains! This first series is based on

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  • 04:59 Popular Super Stars (Constellations): Crash Course Kids #31.1

    Super Stars (Constellations): Crash Course Kids #31.1

    1,291 views / 0 likes - added

    So, you know about stars. But what if those stars formed a super group like The Avengers? Well, then you have a Constellation! In this episode of Crash Course Kids, Sabrina chats about stars, constellations, and how humans have used constellations to tell

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  • 11:20 Algorithmic Bias and Fairness: Crash Course AI #18

    Algorithmic Bias and Fairness: Crash Course AI #18

    283 views / 1 likes - added

    Check out my collab with "Above the Noise" about Deepfakes: https://www.youtube.com/watch?v=Ro8b69VeL9UToday, we're going to talk about five common types of algorithmic bias we should pay attention to: data that reflects existing biases, unbalanced classe

  • 10:27 Procrastination: Crash Course Study Skills #6

    Procrastination: Crash Course Study Skills #6

    689 views / 0 likes - added

    You’re on YouTube right now, but you should probably be studying or writing that research paper. But as long as you’re here, we’re going to help you figure out how to get the better of your desire to procrastinate in the future. Just don’t forget about us

  • 11:08 Popular Measuring Personality: Crash Course Psychology #22

    Measuring Personality: Crash Course Psychology #22

    1,043 views / 1 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 03:33 Popular Danger! Falling Objects: Crash Course Kids #32.1

    Danger! Falling Objects: Crash Course Kids #32.1

    1,318 views / 1 likes - added

    So, what would happen if you dropped a hammer and a feather at the same time, from the same height? Well, the hammer would hit the ground first, right? But why? You might think it's because the hammer is heavier, or has more mass than the feather. But it'

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  • 10:06 Vectors And 2D Motion: Crash Course Physics #4

    Vectors And 2D Motion: Crash Course Physics #4

    651 views / 0 likes - added

    Continuing in our journey of understanding motion, direction, and velocity... today, Shini introduces the ideas of Vectors and Scalars so we can better understand how to figure out motion in 2 Dimensions. But what does that have to do with baseball? Or tw

  • 11:48 Marie Curie and Spooky Rays: Crash Course History of Science #31

    Marie Curie and Spooky Rays: Crash Course History of Science #31

    636 views / 3 likes - added

    It's time to talk about one of the most awesome scientists that has ever been awesome: Marie Curie. She figured out ways to get an amazing education despite the limitations of her homeland, discovered some really important answers to the question "what is

  • 08:49 The World's Blackest Water vs The World's Brightest Flashlight (32,000 Lumens)-Which Will Win?

    The World's Blackest Water vs The World's Brightest Flashlight (32,000 Lumens)-Which Will Win?

    648 views / 0 likes - added

    Get your Action Lab Box Now! https://www.theactionlab.com/ Follow me on Twitter: https://twitter.com/theactionlabman Facebook: https://www.facebook.com/theactionlabrat In this video I show you what happens when you shine one of the World's brightest flash

  • 10:16 Why Moving People is Complicated: Crash Course Engineering #41

    Why Moving People is Complicated: Crash Course Engineering #41

    306 views / 0 likes - added

    Transportation is a big part of our world and engineers play a big role in making it happen. Today well explore how transportation systems are designed and some things transportation engineers have to take into consideration, like signaling, user behavior

  • 04:33 Popular Look Who's Talking: Crash Course Kids #27.2

    Look Who's Talking: Crash Course Kids #27.2

    932 views / 0 likes - added

    Plants! We absolutely depend on them. Oxygen, food, and looking super nice to boot! But, plants have a lot more going on than meets the eye. How do we know that? Investigations and Experimentations! Watch More Crash Course Kids: https://www.youtube.com/us

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  • 03:31 Popular What's Matter? - Crash Course Kids #3.1

    What's Matter? - Crash Course Kids #3.1

    3,115 views / 12 likes - added

    Hey... what's matter? No no no, not what's THE matter. What's MATTER? In this episode of Crash Course Kids, Sabrina talks about what matter is and the three states of matter: Solid, Liquid, and Gas. She also does a quick experiment that you can do at home

  • 10:18 Popular How To Argue - Induction & Abduction: Crash Course Philosophy #3

    How To Argue - Induction & Abduction: Crash Course Philosophy #3

    813 views / 1 likes - added

    We continue our look at philosophical reasoning by introducing two more types: induction and abduction. Hank explains their strengths and weaknesses, as well as counterarguments and the Socratic method. -- Images and video via VideoBlocks or Wikimedia Com

  • 06:36 Congressional Decisions: Crash Course Government and Politics #10

    Congressional Decisions: Crash Course Government and Politics #10

    641 views / 0 likes - added

    This week Craig breaks out the crystal ball to try and figure out why our congresspeople do the things that they do. We’ll talk about the three motivating factors of congressional decisions - constituency, interest groups, and political parties - and we’l

  • 09:56 Sociology & the Scientific Method: Crash Course Sociology #3

    Sociology & the Scientific Method: Crash Course Sociology #3

    614 views / 0 likes - added

    What puts the “science” in social science? Today we’ll explore positivist sociology and how sociologists use empirical evidence to explore questions about the social world. We’ll also introduce two alternatives: interpretative sociology and critical socio

  • 13:42 Popular The Cold War in Asia: Crash Course US History #38

    The Cold War in Asia: Crash Course US History #38

    972 views / 1 likes - added

    Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything

  • 09:04 Popular Blood Vessels, Part 2: Crash Course A&P #28

    Blood Vessels, Part 2: Crash Course A&P #28

    1,479 views / 0 likes - added

    And now we return to blood vessels. In this episode, we start discussing what blood pressure is, how it can become "high", and what that means for our health. One of the more interesting points is that your body has ways of dealing with high blood pressur

  • 09:26 Popular Aesthetic Appreciation: Crash Course Philosophy #30

    Aesthetic Appreciation: Crash Course Philosophy #30

    789 views / 0 likes - added

    Today we are talking about art and aesthetic appreciation. What makes something an artwork? Can art really be defined? Is aesthetic value is objective or subjective? Can taste be developed? How? Get your own Crash Course Philosophy mug or Chom Chom shirt

  • 09:30 Popular Blood Vessels, Part 1 - Form And Function: Crash Course A&P #27

    Blood Vessels, Part 1 - Form And Function: Crash Course A&P #27

    1,407 views / 0 likes - added

    Now that we've discussed blood, we're beginning our look at how it gets around your body. Today Hank explains your blood vessels and their basic three-layer structure of your blood vessels. We're also going over how those structures differ slightly in dif

  • 11:25 The 2008 Financial Crisis: Crash Course Economics #12

    The 2008 Financial Crisis: Crash Course Economics #12

    646 views / 0 likes - added

    Today on Crash Course Economics, Adriene and Jacob talk about the 2008 financial crisis and the US Goverment's response to the troubles. So, all this starts with home mortgages, and the use of mortgages as an investment instrument. For years, it seemed li

  • 12:30 Cybersecurity: Crash Course Computer Science #31

    Cybersecurity: Crash Course Computer Science #31

    670 views / 0 likes - added

    Cybersecurity is a set of techniques to protect the secrecy, integrity, and availability of computer systems and data against threats. In today’s episode, we’re going to unpack these three goals and talk through some strategies we use like passwords, biom

  • 09:43 Popular How To Argue - Philosophical Reasoning: Crash Course Philosophy #2

    How To Argue - Philosophical Reasoning: Crash Course Philosophy #2

    900 views / 0 likes - added

    Before we dive into the big questions of philosophy, you need to know how to argue properly. We’ll start with an overview of philosophical reasoning and breakdown of how deductive arguments work (and sometimes don’t work). -- Images and video via VideoBlo

  • 04:26 Popular Severe Weather: Crash Course Kids #28.2

    Severe Weather: Crash Course Kids #28.2

    1,926 views / 5 likes - added

    So, what's the difference between "weather" and "severe weather"? Is it just how hard the wind is blowing? Is it just thunder and lighting? Well, it can be some or all of those things. In this episode of Crash Course Kids, Sabrina talks to us about what m

  • 03:33 Popular Why No Polar Pineapples: Crash Course Kids #11.2

    Why No Polar Pineapples: Crash Course Kids #11.2

    1,083 views / 0 likes - added

    Plants are amazing. Really! Photosynthesis is an incredible thing. But it also means that some plants can't live everywhere. They need to get the right amount of sunlight for the right amount of time. In this episode of Crash Course Kids, Sabrina chats ab

  • 06:47 Popular Introduction: Crash Course U.S. Government and Politics

    Introduction: Crash Course U.S. Government and Politics

    823 views / 0 likes - added

    In which Craig Benzine introduces a brand new Crash Course about U.S. Government and Politics! This course will provide you with an overview of how the government of the United States is supposed to function, and we'll get into how it actually does functi

  • 11:14 Bayes in Science and Everyday Life: Crash Course Statistics #25

    Bayes in Science and Everyday Life: Crash Course Statistics #25

    372 views / 0 likes - added

    Today we're going to finish up our discussion of Bayesian inference by showing you how we can it be used for continuous data sets and be applied both in science and everyday life. From A/B testing of websites and getting a better understanding of psycholo

  • 04:04 Popular Water Fight!: Crash Course Kids #36.1

    Water Fight!: Crash Course Kids #36.1

    1,532 views / 1 likes - added

    So, what happens when there's not enough water? Well... not good things. Do we let homes have more water for showering and cooking? Or do we let farms have the water for growing crops? There aren't any easy solutions, but today Sabrina chats with us about

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  • 11:23 Intro to Big Data: Crash Course Statistics #38

    Intro to Big Data: Crash Course Statistics #38

    413 views / 0 likes - added

    Today, we're going to begin our discussion of Big Data. Everything from which videos we click (and how long we watch them) on YouTube to our likes on Facebook say a lot about us - and increasingly more and more sophisticated algorithms are being designed

  • 08:13 Popular Interest Groups: Crash Course Government And Politics #42

    Interest Groups: Crash Course Government And Politics #42

    749 views / 0 likes - added

    Today, Craig is going to talk about something you fans out there have been demanding for months - money in politics. Specifically, we're going to talk about special interest groups and their role in the U.S. political system. Special interest groups are g

  • 13:29 Natural Language Processing: Crash Course AI #7

    Natural Language Processing: Crash Course AI #7

    486 views / 0 likes - added

    For more information go to https://curiositystream.com/crashcourse So far in this series, we've mostly focused on how AI can interpret images, but one of the most common ways we interact with computers is through language - we type questions into search e

  • 14:34 Florence and the Renaissance: Crash Course European History #2

    Florence and the Renaissance: Crash Course European History #2

    566 views / 0 likes - added

    The Renaissance was a cultural revitalization that spread across Europe, and had repercussions across the globe, but one smallish city-state in Italy was in many ways the epicenter of the thing. Florence, or as Italians might say, Firenze, was the home to

  • 04:00 Popular Hunting For Properties: Crash Course Kids #9.1

    Hunting For Properties: Crash Course Kids #9.1

    800 views / 1 likes - added

    Remember pre-school? If not, IT WAS SO MUCH EASIER! But when you were stacking blocks and figuring out which block went into which shaped hole, you were learning about properties. In this episode of Crash Course Kids, Sabrina talks about what properties a

  • 11:04 Popular Liquids: Crash Course Chemistry #26

    Liquids: Crash Course Chemistry #26

    753 views / 1 likes - added

    In this episode of Crash Course Chemistry, Hank gives you the low down on things like London Dispersion Forces, Hydrogen Bonds, Cohesion, Adhesion, Viscosity, Capillary Action, Surface Tension, and why liquids are just... WEIRD! -- TABLE OF CONTENTS Londo

  • 10:08 Popular Metabolism & Nutrition, Part 2: Crash Course Anatomy & Physiology #37

    Metabolism & Nutrition, Part 2: Crash Course Anatomy & Physiology #37

    1,609 views / 0 likes - added

    If you're like us, you love the sound of a brunch buffet. But not everything you eat at that glorious buffet is going to be turned into energy. Your body has to work with different forms of food in different ways. In this episode of Crash Course Anatomy &

  • 07:25 Controlling Bureaucracies: Crash Course Government And Politics #17

    Controlling Bureaucracies: Crash Course Government And Politics #17

    650 views / 0 likes - added

    In which Craig Benzine tells you how we keep bureaucracy in check. So we've spent the last few episodes telling you all about what bureaucracies are and why they are formed. And throughout we've hinted about this ever-expanding power within the executive

  • 03:00 Popular Vegetation Transformation: Crash Course Kids #5.2

    Vegetation Transformation: Crash Course Kids #5.2

    1,110 views / 0 likes - added

    Have you ever seen a magic trick where one thing changes to another thing? Well, that's nothing compared to what plants can do through a process called photosynthesis. In this episode, Sabrina talks about how photosynthesis works! This first series is bas

  • 03:57 Popular Seasons And The Sun: Crash Course Kids 11.1

    Seasons And The Sun: Crash Course Kids 11.1

    2,263 views / 1 likes - added

    Updated with graphics fixed. Thanks for pointing that out! Ever wonder why we have seasons? A lot of people think it's because the Earth gets further away from the sun in winter, and closer in the summer. But, it's actually more interesting than that. In

  • 08:16 Pitching and Pre-Production: Crash Course Film Production #2

    Pitching and Pre-Production: Crash Course Film Production #2

    554 views / 0 likes - added

    Pitching your movie to people can be hard. A studio, a friend, your mom... each of these entities will have different stressed and give you different results. But, what's important in a pitch? And what happens after the pitch? How do you get your movie re

  • 04:26 Popular Star Personalities: Crash Course Kids #25.2

    Star Personalities: Crash Course Kids #25.2

    751 views / 0 likes - added

    Down here, on Earth, if you look up at the night sky, it seems like all the stars up there look the same. Or maybe at least similar. But, it turns out that stars are very different and we shouldn't stereotype them. Some are bigger, some burn through their

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  • 14:22 Italian and German Unification: Crash Course European History #27

    Italian and German Unification: Crash Course European History #27

    580 views / 0 likes - added

    So, we haven't talked much about Italy and Germany so far in Crash Course Euro, and that's because prior to the mid-19th century, those two nation-states weren't really a thing. Today we'll look at how Italy and Germany pulled it together in the second ha

  • 11:24 Keyboards & Command Line Interfaces: Crash Course Computer Science #22

    Keyboards & Command Line Interfaces: Crash Course Computer Science #22

    694 views / 0 likes - added

    Today, we are going to start our discussion on user experience. We've talked a lot in this series about how computers move data around within the computer, but not so much about our role in the process. So today, we're going to look at our earliest form o

  • 15:09 Modern Thought and Culture in 1900: Crash Course European History #31

    Modern Thought and Culture in 1900: Crash Course European History #31

    362 views / 0 likes - added

    Europe was in transition politically and culturally at the beginning of the 20th century. Today, we're looking at the dawn of modern science, and the rise of Modernism in the arts, especially in music, dance, and visual arts. We'll look at changes in musi

  • 09:23 Political Parties: Crash Course Government And Politics #40

    Political Parties: Crash Course Government And Politics #40

    672 views / 1 likes - added

    Today, Craig is going to talk about political parties and their role in American politics. So, when most people think about political parties they associate them with the common ideologies of the voters and representatives within that party, but the goal

  • 08:51 Popular Taking Notes: Crash Course Study Skills #1

    Taking Notes: Crash Course Study Skills #1

    833 views / 0 likes - added

    The first step in honing your new study skills is to take better notes. This week Thomas will tell you everything you need to know to come to class prepared and find a note-taking system that will help you retain and review like a champ. Resources: Study

  • 05:28 Popular History of the 4th of July: Crash Course US History Special

    History of the 4th of July: Crash Course US History Special

    835 views / 3 likes - added

    In which John Green teaches you a bit about the 4th of July. In this special short Crash Course, John celebrates American Independence Day by teaching you how the holiday came to be on the 4th of July, and the many ways that Americans celebrate the day. T

  • 12:17 Popular Registers and RAM: Crash Course Computer Science #6

    Registers and RAM: Crash Course Computer Science #6

    739 views / 0 likes - added

    Take the 2017 PBS Digital Studios Survey: http://surveymonkey.com/r/pbsds2017. Today we’re going to create memory! Using the basic logic gates we discussed in episode 3 we can build a circuit that stores a single bit of information, and then through some

  • 12:17 Memory & Storage: Crash Course Computer Science #19

    Memory & Storage: Crash Course Computer Science #19

    590 views / 0 likes - added

    Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here! https://store.dftba.com/products/computer-science-coasters So we’ve talked about computer memory a couple times in this series, but what we haven’t talked about is sto

  • 05:58 Types Of Bureaucracies: Crash Course Government And Politics #16

    Types Of Bureaucracies: Crash Course Government And Politics #16

    612 views / 0 likes - added

    This week Craig Benzine breaks down the different types of bureaucracies. I mean sure, they’re all part of the executive branch, but some work more directly with the president than others. Some bureaucracies exist solely to independently regulate industry

  • 15:33 Witchcraft: Crash Course European History #10

    Witchcraft: Crash Course European History #10

    430 views / 2 likes - added

    During our last several episodes, Europe and the European-controlled world have been in crisis. Wars, disease, climate changes, and shifts in religious and political power threw the European world into turmoil. People were looking for a scapegoat, and for

  • 10:16 Popular Tissues, Part 2 - Epithelial Tissue: Crash Course A&P #3

    Tissues, Part 2 - Epithelial Tissue: Crash Course A&P #3

    1,553 views / 0 likes - added

    •••SUBBABLE MESSAGE••• TO : Phoebe and James McMullan FROM : Dad Continue being awesome Phoebe&James from John&Hank! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything

  • 09:00 Papers & Essays: Crash Course Study Skills #9

    Papers & Essays: Crash Course Study Skills #9

    550 views / 0 likes - added

    Writing research papers is an essential skill in your career as a student, and this week we’re going to help you do that like a pro. From figuring out where to begin, to finding the best systems, to breaking out of “research recursion system” (maybe just

  • 17:06 The Industrial Revolution: Crash Course European History #24

    The Industrial Revolution: Crash Course European History #24

    590 views / 0 likes - added

    We've talked about a lot of revolutions in 19th Century Europe, and today we're moving on to a less warlike revolution, the Industrial Revolution. You'll learn about the development of steam power and mechanization, and the labor and social movements that

  • 11:32 Screens & 2D Graphics: Crash Course Computer Science #23

    Screens & 2D Graphics: Crash Course Computer Science #23

    592 views / 0 likes - added

    Today we begin our discussion of computer graphics. So we ended last episode with the proliferation of command line (or text) interfaces, which sometimes used screens, but typically electronic typewriters or teletypes onto paper. But by the early 1960s a

  • 14:51 Popular The Rise of Conservatism: Crash Course US History #41

    The Rise of Conservatism: Crash Course US History #41

    715 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th

  • 16:34 Economic Depression and Dictators: Crash Course European History #37

    Economic Depression and Dictators: Crash Course European History #37

    550 views / 0 likes - added

    We're still leading up to World War II, but first we gotta talk about the rise of the dictators. Today we talk about the rise of militaristic dictatorships in Germany, the Soviet Union, Japan, and Spain, and the economic depression that set the stage for

  • 10:23 Popular Respiratory System, Part 2: Crash Course A&P #32

    Respiratory System, Part 2: Crash Course A&P #32

    1,174 views / 1 likes - added

    Can a paper bag really help you when you are hyperventilating? It turns out that it can. In part 2 of our look at your respiratory system Hank explains how your blood cells exchange oxygen and CO2 to maintain homeostasis. We'll dive into partial pressure

  • 12:22 Why the Evolutionary Epic Matters: Crash Course Big History #203

    Why the Evolutionary Epic Matters: Crash Course Big History #203

    448 views / 0 likes - added

    Today we're talking about evolution–basically the history of all life on Earth. The thing is, why are we talking about this. Well, the story of life, all the way back to single celled microbes billions of years ago, is all part of our human story. An impo

  • What Are Rocks and How Do They Form? Crash Course Geography #18

    What Are Rocks and How Do They Form? Crash Course Geography #18

    229 views / 0 likes - added

    From towering mountains to pebbles along a river, the Earth is made of a huge variety of rocks. In today's episode, we're going to follow the rock cycle of a piece of granite in the Himalayan mountains, and as you'll see, every rock has a far-reaching sto

  • 09:13 Popular Immune System, Part 1: Crash Course A&P #45

    Immune System, Part 1: Crash Course A&P #45

    1,253 views / 2 likes - added

    Our final episodes of Anatomy & Physiology explore the way your body keeps all that complex, intricate stuff alive and healthy -- your immune system. The immune system’s responses begin with physical barriers like skin and mucous membranes, and when they’

  • 15:40 The Age of Exploration: Crash Course European History #4

    The Age of Exploration: Crash Course European History #4

    530 views / 0 likes - added

    The thing about European History is that it tends to leak out of Europe. Europeans haven't been great at staying put in Europe. As human beings do, the people of Europe were very busy traveling around to trade, to spread religion, and in a lot of cases to

  • 09:36 Breaking the Silence: Crash Course Film History #10

    Breaking the Silence: Crash Course Film History #10

    559 views / 1 likes - added

    Nothing changed movies like the arrival of synchronous sound. NOTHING! Acting, directing, cinematography, and presentation all had to be rethought. Some studios were more quick to take on the challenge while others waited until the last moment. Some actor

  • 05:42 Popular She has the world's largest mouth! - Guinness World Records

    She has the world's largest mouth! - Guinness World Records

    891 views / 2 likes - added

    Preorder Guinness World Records 2022 || https://gwr.co/2022 Watch the GWR’s Favourites || http://gwr.co/YT-Favs You may have seen Sam's monster mouth on TikTok, but now it's Guinness World Records official! Samantha Ramsdell, from the USA, holds the

  • 04:06 Fast-Food Restaurants From 12 Countries Around The World | Around The World

    Fast-Food Restaurants From 12 Countries Around The World | Around The World

    463 views / 0 likes - added

    Though American fast food chains like McDonald's, KFC, and Domino's tend to dominate the fast food industry in many countries around the world, that doesnt mean those are the only ones that exist. Most countries have their own popular fast food chains lik

  • 11:05 Popular Digestive System, Part 1: Crash Course A&P #33

    Digestive System, Part 1: Crash Course A&P #33

    1,810 views / 5 likes - added

    Nachos are delicious. And versatile because today they're also going to help us learn a thing or two about your digestive system. Nachos can provide us with energy and raw materials, by first ingesting something nutritious, propelling it through the alime

  • 10:30 Popular Taste&Smell: Crash Course A&P #16

    Taste&Smell: Crash Course A&P #16

    986 views / 0 likes - added

    Hank resists the urge to devour a slice of pizza so that he can walk you through the way we experience our major special senses. It all boils down to one thing: sensory cells translating chemical, electromagnetic, and mechanical stimuli into action potent

  • 03:55 Popular Wood, Water, And Properties: Crash Course Kids #15.1

    Wood, Water, And Properties: Crash Course Kids #15.1

    827 views / 1 likes - added

    Quick, think of three words to describe yourself. TIME'S UP! What did you think of? Chances are you thought of descriptive words that we call Properties. In this episode of Crash Course Kids, Sabrina talks about how properties help us understand objects.

  • 03:33 Popular Land And Water: Crash Course Kids #16.1

    Land And Water: Crash Course Kids #16.1

    1,240 views / 2 likes - added

    Remember Sol, the closest star to Earth? We like to call it The Sun and we haven't talked about it in a little while. One interesting thing about the energy we get from the sun is that it's not absorbed the same way by different materials. In fact, even a

  • 11:02 Cheese, Catastrophes, & Process Control: Crash Course Engineering #25

    Cheese, Catastrophes, & Process Control: Crash Course Engineering #25

    361 views / 0 likes - added

    Engineering, like life, could really use a lot more cheese. This week we are looking at a cheese factory in Toronto and what it can teach us about process control systems. Well explore feedforward and feedback systems, and see how integrating them both wi

  • 10:57 Popular The Nervous System, Part 3 - Synapses!: Crash Course A&P #10

    The Nervous System, Part 3 - Synapses!: Crash Course A&P #10

    1,429 views / 0 likes - added

    •••SUBBABLE MESSAGE••• TO: NerdFighteria FROM: Dave at DTXC.CO Cycling t-shirts at DTXC.CO. Don't give up the Road! DFTBA! *** Subbable Co-Sponsors: Logan Sanders https://www.facebook.com/perrylogans Dr. Boyev http://youtube.com/taichiknees *** You can di

  • 09:36 Popular Alkenes&Alkynes - Crash Course Chemistry #41

    Alkenes&Alkynes - Crash Course Chemistry #41

    1,093 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 10:36 Popular Money And Finance: Crash Course Economics #11

    Money And Finance: Crash Course Economics #11

    849 views / 1 likes - added

    So, we've been putting off a kind of basic question here. What is money? What is currency? How are the two different. Well, not to give away too much, but money has a few basic functions. It acts as a store of value, a medium of exchange, and as a unit of

  • 09:50 Popular Public Opinion: Crash Course Government And Politics #33

    Public Opinion: Crash Course Government And Politics #33

    1,204 views / 0 likes - added

    So today, Craig is finally going to start talking about politics. Now up until this point we've specifically been looking at government - that is answering the questions of who, what, and how in relation to policies. But politics is different in that it l

  • 09:29 Popular The Language of Film: Crash Course Film History #5

    The Language of Film: Crash Course Film History #5

    762 views / 0 likes - added

    In this episode of Crash Course Film History, we talk about the development of the language of films by filmmakers like Edwin S. Porter and his films; Life of an American Fireman and The Great Train Robbery. Produced in collaboration with PBS Digital Stud

  • 10:55 Popular Digestive System, Part 2: Crash Course A&P #34

    Digestive System, Part 2: Crash Course A&P #34

    1,650 views / 1 likes - added

    Nearly 200 years ago, Alexis St. Martin was shot in the stomach. He was saved by local army doctor William Beaumont, but had to live out his remaining years with a gaping hole in the stomach -- allowing Beaumont to learn a lot about how human digestion wo

  • 11:18 Popular Nuclear Chemistry Part 2: Fusion and Fission - Crash Course Chemistry #39

    Nuclear Chemistry Part 2: Fusion and Fission - Crash Course Chemistry #39

    1,742 views / 1 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 11:00 The Future of Artificial Intelligence: Crash Course AI #20

    The Future of Artificial Intelligence: Crash Course AI #20

    545 views / 0 likes - added

    Today, in our final episode of Crash Course AI, we're going to look towards the future. We've spent much of this series explaining how and why we don't have the Artificial General Intelligence (or AGI) that we see in the movies like Bladerunner, Her, or E

  • 12:33 Popular That's Why Carbon Is A Tramp: Crash Course Biology #1

    That's Why Carbon Is A Tramp: Crash Course Biology #1

    1,438 views / 0 likes - added

    And thus begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named Gilbert Lewis? It's all containe

  • 05:10 Popular Weather Channels: Crash Course Kids #34.2

    Weather Channels: Crash Course Kids #34.2

    1,330 views / 2 likes - added

    Why is my weather app sometimes wrong? Well it has a lot to do with wind. Jet Streams, air cells, the shape and movement of the Earth... there are a lot of things that make weather a little unpredictable. In this episode of Crash Course Kids, Sabrina talk

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  • 04:42 Popular Material Magic - Making Diamonds: Crash Course Kids #40.2

    Material Magic - Making Diamonds: Crash Course Kids #40.2

    972 views / 1 likes - added

    Did you know we can actually make diamonds in a lab? It's true! We can! And this is both really good and really cool. In this episode of Crash Course Kids, Sabrina shows us how materials scientists have done just that and why it's so important. Watch More

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  • 06:30 Popular Presidential Power: Crash Course Government and Politics #11

    Presidential Power: Crash Course Government and Politics #11

    747 views / 0 likes - added

    This week Craig looks at the expressed powers of the President of the United States - that is the ones you can find in the Constitution. From appointing judges and granting pardons, to vetoing laws and acting as the nation’s chief diplomat on foreign poli

  • 14:02 The Northern Renaissance: Crash Course European History #3

    The Northern Renaissance: Crash Course European History #3

    416 views / 0 likes - added

    The European Renaissance may have started in Florence, but it pretty quickly moved out of Italy and spread the art, architecture, literature, and humanism across Europe to places like France, Spain, England, and the Low Countries.SOURCES:Hunt, Lynn et al.

  • 10:32 Popular What Is God Like?: Crash Course Philosophy #12

    What Is God Like?: Crash Course Philosophy #12

    763 views / 0 likes - added

    Today we are moving on from the existence of God to look at the philosophical debate surrounding the traditional divine attributes - omnipotence, omniscience, omnitemporality, and omnibenevolence. We are exploring the puzzles that these attributes create

  • 04:20 Popular Oobleck And Non-Newtonian Fluids: Crash Course Kids #46.1

    Oobleck And Non-Newtonian Fluids: Crash Course Kids #46.1

    1,056 views / 1 likes - added

    Ever heard of Oobleck? How about Non-Newtonian fluids? Well, today Sabrina is going to show us that things can sometimes behave like a solid, and sometimes like a liquid depending on how much force is applied to them. In this episode of Crash Course Kids,

  • 10:44 Popular Sympathetic Nervous System: Crash Course A&P #14

    Sympathetic Nervous System: Crash Course A&P #14

    705 views / 0 likes - added

    Hank tries not to stress you out too much as he delves into the functions and terminology of your sympathetic nervous system. -- Table of Contents Sympathetic Nervous System Controls the Body's Stress Response 0:26 How Signals Travel to Effectors 1:48 Ace

  • 02:04 Popular This Great Dane is the World's Tallest Dog - Guinness World Records

    This Great Dane is the World's Tallest Dog - Guinness World Records

    729 views / 0 likes - added

    Subscribe || https://gwr.co/YT-SubFavourites || http://gwr.co/YT-FavsRead more: https://www.guinnessworldrecords.com/news/2022/5/can-i-ride-him-zeus-the-great-dane-confirmed-as-worlds-tallest-dogZeus was measured at 1.046 metres (3 ft 5.18 in) when being

  • 03:59 Defining Success: Crash Course Kids #18.2

    Defining Success: Crash Course Kids #18.2

    624 views / 0 likes - added

    In our last episode, Sabrina talked about how Engineers define the problems they need to solve. But how do you know when you've actually solved a problem? What do you expect to happen that would equal success? In this episode, Sabrina chats about how Engi

  • 11:00 Why Cosmic Evolution Matters: Crash Course Big History #201

    Why Cosmic Evolution Matters: Crash Course Big History #201

    493 views / 0 likes - added

    Crash Course Big History is back! It turns out, we couldn't tell all of the 13.8 billion years of the history of the universe in 10 Crash Course Episodes. So, Big History host Emily Graslie has returned to add 6 more episodes that look at why the stuff we

  • 09:57 Popular The Integumentary System, Part 2 - Skin Deeper: Crash Course A&P #7

    The Integumentary System, Part 2 - Skin Deeper: Crash Course A&P #7

    763 views / 0 likes - added

    •••SUBBABLE MESSAGE••• TO: Helle Søndergaard FROM: Martin Søndergaard Congratulations for finishing first semester on physiotherapy! I'm so proud! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as

  • 09:26 Popular Planning & Organization: Crash Course Study Skills #4

    Planning & Organization: Crash Course Study Skills #4

    835 views / 1 likes - added

    The best way to make sure you’re making the most of the time you have is to start off well organized. This week we’re talking about planning and organizational systems and how to set yourself up for success. Resources: Planning Mode vs. Robot Mode: https:

  • 04:29 Popular The Great Aqua Adventure: Crash Course Kids #24.1

    The Great Aqua Adventure: Crash Course Kids #24.1

    891 views / 3 likes - added

    Water travels... a lot. In fact, the water cycle is amazing and takes water all over the planet by using evaporation, condensation, and precipitation. In this episode of Crash Course Kids, Sabrina shows us how the water cycle works and how you can create

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  • 04:53 Popular Following The Sun: Crash Course Kids #8.2

    Following The Sun: Crash Course Kids #8.2

    1,957 views / 7 likes - added

    Have you ever wondered why your shadow is longer sometimes and shorter others? It turns out it all has to do with that marvelous big ball of light in the sky; The Sun! This first series is based on 5th grade science. We're super excited and hope you enjoy

  • 07:53 Presidential Powers 2: Crash Course Government And Politics

    Presidential Powers 2: Crash Course Government And Politics

    673 views / 0 likes - added

    This week Craig continues our conversation on presidential powers by looking at those NOT found in the Constitution - implied or inherent powers. We’ll talk about how the president uses his or her power to negotiate executive agreements, recommend legisla

  • 15:01 Popular The Progressive Era: Crash Course US History #27

    The Progressive Era: Crash Course US History #27

    907 views / 1 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps keep the channel producing great conten

  • 13:14 Expansion and Resistance: Crash Course European History #28

    Expansion and Resistance: Crash Course European History #28

    531 views / 0 likes - added

    In 19th century Europe, with nation building well under way, thoughts turned outward, toward empire. This week, we're looking at how Europeans expanded into Africa, Asia, and Oceania during the 1800s. You'll learn about China and the Opium War, British In

  • 04:31 Popular Orbits Are Odd: Crash Course Kids #22.2

    Orbits Are Odd: Crash Course Kids #22.2

    777 views / 0 likes - added

    Last week we talked about the orbits of the Earth and our Moon. But today we're going to go a little bigger... well, a lot better. Did you know that there is a massive Black Hole at the center of our Galaxy? Or that Pluto's orbit is really... weird? Today

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  • 04:01 Popular Earth's Rotation & Revolution: Crash Course Kids 8.1

    Earth's Rotation & Revolution: Crash Course Kids 8.1

    1,531 views / 1 likes - added

    So, have you ever wondered why we have seasons? Or maybe where the sun goes when it's night time? *Hint: It doesn't actually go anywhere* In this episode of Crash Course Kids, Sabrina talks about the Earth's rotation and revolution and how these things co

  • Ancient & Medieval Medicine: Crash Course History of Science #9

    Ancient & Medieval Medicine: Crash Course History of Science #9

    545 views / 0 likes - added

    The history of medicine is about two of our big questions: one, what is life? What makes it so special, so fragile, so goopy!? Two, how do we know what we know? Why should I take my doctors advice? Why are deep-fried Oreos bad for me?It may be tempting to

  • 14:16 Popular Russian Revolution and Civil War: Crash Course European History #35

    Russian Revolution and Civil War: Crash Course European History #35

    707 views / 0 likes - added

    World War I was very hard on the Russian Empire. So hard, in fact, that it led to the end of the Russian Empire. As the global conflict ground on, Tsar Nicholas II faced increasing unrest at home. Today we'll learn about the Revolutions of 1917, the rise

  • 11:41 Popular Buffers, the Acid Rain Slayer: Crash Course Chemistry #31

    Buffers, the Acid Rain Slayer: Crash Course Chemistry #31

    1,024 views / 2 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 07:56 Popular Civil Rights & Liberties: Crash Course Government #23

    Civil Rights & Liberties: Crash Course Government #23

    710 views / 0 likes - added

    Today, Craig is going to give you an overview of civil rights and civil liberties. Often these terms are used interchangeably, but they are actually very different. Our civil liberties, contained in the Bill of Rights, once only protected us from the fede

  • 10:48 Party Systems: Crash Course Government And Politics #41

    Party Systems: Crash Course Government And Politics #41

    683 views / 0 likes - added

    Today, Craig is going to dive into the history of American political parties. So throughout most of United States history our political system has been dominated by a two-party system, but the policies and the groups that support these parties have change

  • 06:16 Congressional Delegation: Crash Course Government And Politics #13

    Congressional Delegation: Crash Course Government And Politics #13

    618 views / 0 likes - added

    In which Craig Benzine teaches you about delegation, and informal powers. What are all these federal agencies about? Well, the president has a lot of stuff to do as the chief executive, and as much as Americans like to talk about personal responsibility,

  • 02:29 Popular World's first 3D-printed pill: Spritam sets world record

    World's first 3D-printed pill: Spritam sets world record

    857 views / 0 likes - added

    Blue Ash, OH, USA -- Developed by Ohio-based pharmaceutical company Aprecia, Spritam levetiracetam is a new drug to control seizures brought on by epilepsy; approved by the US Food and Drug Administration, it employs the company's trademark "ZipDose" tech

  • 12:23 Neural Networks and Deep Learning: Crash Course AI #3

    Neural Networks and Deep Learning: Crash Course AI #3

    320 views / 1 likes - added

    You can learn more about CuriosityStream at https://curiositystream.com/crashcourse. Today, we're going to combine the artificial neuron we created last week into an artificial neural network. Artificial neural networks are better than other methods for m

  • 11:05 Reversibility & Irreversibility: Crash Course Engineering #8

    Reversibility & Irreversibility: Crash Course Engineering #8

    313 views / 0 likes - added

    How do we design the most efficient machines and processes? Today well try to figure that out as we discuss heat & work, reversibility & irreversibility, and how to use efficiency to measure a system. Crash Course Engineering is produced in association wi

  • 09:23 Popular How Presidents Govern: Crash Course Government And Politics #14

    How Presidents Govern: Crash Course Government And Politics #14

    898 views / 0 likes - added

    This week Craig Benzine talks about how the president gets things done. Filling the role of the executive branch is a pretty big job - much too big for just one person. It's so big that the president employees an entire federal bureaucracy! Today, we’re j

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  • 10:33 Popular Metabolism & Nutrition, Part 1: Crash Course A&P #36

    Metabolism & Nutrition, Part 1: Crash Course A&P #36

    1,109 views / 0 likes - added

    Metabolism is a complex process that has a lot more going on than personal trainers and commercials might have you believe. Today we are exploring some of its key parts, including vital nutrients -- such as water, vitamins, minerals, carbs, fats, and prot

  • 10:08 Popular The Heart, Part 1 - Under Pressure: Crash Course A&P #25

    The Heart, Part 1 - Under Pressure: Crash Course A&P #25

    1,325 views / 0 likes - added

    Your heart gets a lot of attention from poets, songwriters, and storytellers, but today Hank's gonna tell you how it really works. The heart’s ventricles, atria, and valves create a pump that maintains both high and low pressure to circulate blood from th

  • 11:22 Comedies, Romances, and Shakespeare's Heroines: Crash Course Theater #16

    Comedies, Romances, and Shakespeare's Heroines: Crash Course Theater #16

    399 views / 1 likes - added

    This week we're continuing our discussion of William Shakespeare and looking at his comedies and romances. As well as something called problem plays. Some of his plays, they had problems. We'll also put on pants, escape to forest, and talk about Shakepear

  • 09:54 Popular Uniform Circular Motion: Crash Course Physics #7

    Uniform Circular Motion: Crash Course Physics #7

    1,349 views / 0 likes - added

    Did you know that centrifugal force isn't really a thing? I mean, it's a thing, it's just not real. In fact, physicists call it a "Fictitious Force." Mind blown yet? To explore this idea further, this week Shini sits down with us to discuss centripetal fo

  • 09:39 Popular Market Economy: Crash Course Government And Politics #46

    Market Economy: Crash Course Government And Politics #46

    885 views / 1 likes - added

    Today, we’re going to take a look at how the government plays a role in the economy. Specifically, the way the government creates and maintains our market economic system. Now sure, the government’s role in the economy can be controversial, some may even

  • 03:31 The Ecliptic: Crash Course Kids #37.2

    The Ecliptic: Crash Course Kids #37.2

    551 views / 0 likes - added

    So, what is the Ecliptic? Well, it has to do with the Zodiac constellations and our sun and how they move in relation to one another. It's kind of cool! In this episode, Sabrina chats about this imaginary line called the Ecliptic and its cycle in the sky.

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  • 08:36 Heat Transfer: Crash Course Engineering #14

    Heat Transfer: Crash Course Engineering #14

    378 views / 0 likes - added

    Today were talking about heat transfer and the different mechanisms behind it. Well explore conduction, the thermal conductivity of materials, convection, boundary layers, and radiation. Crash Course Engineering is produced in association with PBS Digital

  • 09:56 Popular The Golden Age of Hollywood: Crash Course Film History #11

    The Golden Age of Hollywood: Crash Course Film History #11

    792 views / 0 likes - added

    It's time for the glitz and the glamour of big motion pictures that helped keep American spirits up during and after the Great Depression. Sound was a huge change to motion pictures, but there were still a few technological innovations to come, like color

  • 10:52 Memory: Crash Course Study Skills #3

    Memory: Crash Course Study Skills #3

    590 views / 0 likes - added

    This episode is sponsored by The Great Courses Plus. Start your free one-month trial today (and let The Great Courses Plus know we sent you!): http://ow.ly/faUN30db5c7 An essential part of learning and studying is remembering things, so this week Thomas e

  • 10:51 Popular Psychological Research - Crash Course Psychology #2

    Psychological Research - Crash Course Psychology #2

    815 views / 1 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 27:11 Stampy's "Lovelier" World - World Tour - Part 2

    Stampy's "Lovelier" World - World Tour - Part 2

    601 views / 0 likes - added

    Welcome to a tour of an improved, remake of my Lovely World.Redstone's channel - https://www.youtube.com/channel/UCrzzjBJQagPRCqiOO8NcJqwDownload the world here - https://youtu.be/eiYbY0QNUeY Twitter - @stampylongnoseFacebook - www.facebook.com/stampylong

  • 06:59 Popular Bureaucracy Basics: Crash Course Government And Politics #15

    Bureaucracy Basics: Crash Course Government And Politics #15

    962 views / 0 likes - added

    This week Craig Benzine discuses bureaucracies. Bureaucracies tend to be associated with unintelligible rules and time-wasting procedures, but they play an important, though controversial, role in governing. From the FDA to the EPA, these agencies were es

  • 09:13 Popular Anselm And The Argument For God: Crash Course Philosophy #9

    Anselm And The Argument For God: Crash Course Philosophy #9

    821 views / 0 likes - added

    Today we are introducing a new area of philosophy – philosophy of religion. We are starting this unit off with Anselm’s argument for God’s existence, while also considering objections to that argument. -- “That’s a Neigh” David Goehring https://www.flickr

  • 09:29 Popular Equilibrium Equations: Crash Course Chemistry #29

    Equilibrium Equations: Crash Course Chemistry #29

    748 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 07:38 Popular Search And Seizure: Crash Course Government And Politics #27

    Search And Seizure: Crash Course Government And Politics #27

    703 views / 0 likes - added

    This week Craig talks about police searches and seizures. Now, the fourth amendment says that you have the right to be protected against "unreasonable searches and seizures" but what exactly this mean? Well, it's complicated. The police often need warrant

  • 10:39 Silicon, Semiconductors, & Solar Cells: Crash Course Engineering #22

    Silicon, Semiconductors, & Solar Cells: Crash Course Engineering #22

    303 views / 0 likes - added

    Today were looking at silicon, and how introducing small amounts of other elements allow silicon layers to conduct currents, turning them into semiconductors. Well explore how putting two different types N and P semiconductors together gives us electrical

  • 08:51 Popular Comparative Anatomy: What Makes Us Animals - Crash Course Biology #21

    Comparative Anatomy: What Makes Us Animals - Crash Course Biology #21

    1,767 views / 0 likes - added

    Hank introduces us to comparative anatomy, which studies the similarities and differences in animal anatomy to support the theory of evolution and the shared ancestry of living things. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like

  • 04:09 Popular Vacation Or Conservation (Of Mass): Crash Course Kids #23.1

    Vacation Or Conservation (Of Mass): Crash Course Kids #23.1

    4,249 views / 0 likes - added

    So when water evaporates, what happens? Where does that water go? Does just vanish? Is it no more? Can matter every just go away? Well, the answer is no, it can't. But it can LOOK like it does. In this episode of Crash Course Kids, Sabrina shows us how Co

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  • 14:59 18th Century Warfare: Crash Course European History #20

    18th Century Warfare: Crash Course European History #20

    424 views / 0 likes - added

    European powers had a lot of wars in the 18th century, and they weren't confined to Europe. Conflict raged across the globe, in what might be called a World War...but we don't call it that, because we already have a couple of those coming up in the 20th c

  • 09:50 Popular Aromatics and Cyclic Compounds - Crash Course Chemistry #42

    Aromatics and Cyclic Compounds - Crash Course Chemistry #42

    1,823 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 05:07 Popular Current Events: Crash Course Kids #34.1

    Current Events: Crash Course Kids #34.1

    1,264 views / 2 likes - added

    What are air currents? Air currents are like rivers of wind caused by areas of high and low pressure.The air above the land is warmer and less dense, so it rises. The air over the water is cooler and heavier. The cool air rushes in toward the low-pressure

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