Search Results: "Why You"

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06:26
Increasing Opportunity Cost

680 views / 0 likes - added 9 years ago

Why the opportunity cost may increase as you pursue more rabbits More free lessons at: http://www.khanacademy.org/video?v=00fgAG6VrRQ
14:27 Popular
Singular Matrices

707 views / 0 likes - added 9 years ago

When and why you can't invert a matrix. More free lessons at: http://www.khanacademy.org/video?v=UqyN7-tRS00
09:05 Popular
The Bicameral Congress: Crash Course Government and Politics #2

706 views / 0 likes - added 9 years ago

In which Craig Benzine teaches you about the United States Congress, and why it's bicameral, and what bicameral means. Craig tells you what the Senate and House of Representatives are for, some of the history of the institutions, and reveal to you just ho
06:36
Congressional Decisions: Crash Course Government and Politics #10

637 views / 0 likes - added 9 years ago

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
09:46 Popular
Moon Phases: Crash Course Astronomy #4

1,971 views / 6 likes - added 9 years ago

In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases. -- Why the Moon Has Phases 0:36.1 Spheres in Orbit 1:05.4 Name of the Moon Phases 2:25.5 How We See It 7:48.2 -- PBS Digital Studios: http://youtube
13:43 Popular
Rethinking Civilization - Crash Course World History 201

752 views / 0 likes - added 9 years ago

In which John Green returns to teaching World History! This week, we'll be talking about the idea of civilization, some of the traditional hallmarks of so-called civilization, and why some people would choose to live outside the civilization model. It tur
14:04 Popular
Money&Debt: Crash Course World History 202

911 views / 0 likes - added 9 years ago

In which John Green teaches about filthy, filthy lucre. Money. And Debt. So, what is money? And what is it for? And why do we use money? And why does it all disappear so quickly after payday? John will look into 75% of these questions, and if he doesn't c
09:10 Popular
HOW World War I Started: Crash Course World History 209

1,513 views / 6 likes - added 9 years ago

In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates, but the way that things unfolded in July and August of 1914 are kind of important to understanding the Great War. You'll learn ab
10:56 Popular
Who Started World War I: Crash Course World History 210

1,081 views / 3 likes - added 9 years ago

In which John Green teaches you WHY World War I started. Or tries to anyway. With this kind of thing, it's kind of hard to assign blame to any one of the nations involved. Did the fault lie with Austria-Hungary? Germany? Russia? Julius Caesar? One thing w
12:59 Popular
The End of Civilization (In the Bronze Age): Crash Course World History 211

869 views / 1 likes - added 9 years ago

In which John Green teaches you about the Bronze Age civilization in what we today call the middle east, and how the vast, interconnected civilization that encompassed Egypt, The Levant, and Mesopotamia came to an end. What's that you say? There was no su
11:54 Popular
The Rise of the West and Historical Methodology: Crash Course World History #212

906 views / 2 likes - added 9 years ago

In which John Green talks about the methods of writing history by looking at some of the ways that history has been written about the rise of the West. But first he has to tell you what the West is. And then he has to explain the Rise of the West. And the
13:16 Popular
Charles V and the Holy Roman Empire: Crash Course World History #219

1,096 views / 2 likes - added 9 years ago

Get the new Crash Course World History Character poster here: http://store.dftba.com/products/crashcourse-characters-poster In which John Green teaches you about the Holy Roman Empire by teaching you about Charles V. Charles Hapsburg was the holy Roman Em
12:14 Popular
War and Nation Building in Latin America: Crash Course World History 225

894 views / 0 likes - added 9 years ago

In which John Green teaches you about nation building and nationalism in Latin America. Sometimes, the nations of Latin America get compared to the nations of Europe, and are found wanting. This is kind of a silly comparison. The rise of democratic, econo
09:34 Popular
Consciousness - Crash Course Psychology #8

1,103 views / 0 likes - added 9 years ago

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.
10:41 Popular
To Sleep, Perchance to Dream - Crash Course Psychology #9

1,318 views / 0 likes - added 9 years ago

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.
10:18 Popular
Remembering and Forgetting - Crash Course Psychology #14

1,070 views / 1 likes - added 9 years ago

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.
11:20 Popular
The Power of Motivation: Crash Course Psychology #17

1,024 views / 0 likes - added 9 years ago

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.
12:24 Popular
Rorschach&Freudians: Crash Course Psychology #21

712 views / 0 likes - added 9 years ago

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

1,040 views / 1 likes - added 9 years ago

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.
10:51 Popular
Feeling All the Feels: Crash Course Psychology #25

744 views / 2 likes - added 9 years ago

***Subbable Message*** To Robert, Thank you for showing me the world, darling! From Amy and That's happiness; to be dissolved into something complete and great. From Ty Scaletta ****** You can directly support Crash Course at http://www.subbable.com/crash
10:48 Popular
Social Thinking: Crash Course Psychology #37

718 views / 0 likes - added 9 years ago

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.
10:08 Popular
Social Influence: Crash Course Psychology #38

775 views / 0 likes - added 9 years ago

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.
10:12 Popular
The Nucleus: Crash Course Chemistry #1

920 views / 1 likes - added 9 years ago

Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron and electron - come together in trillions of combinations to f
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The Periodic Table: Crash Course Chemistry #4

1,156 views / 1 likes - added 9 years ago

Hank gives us a tour of the most important table ever, including the life story of the obsessive man who championed it, Dmitri Mendeleev. The periodic table of elements is a concise, information-dense catalog of all of the different sorts of atoms in the
12:47
Stoichiometry: Chemistry for Massive Creatures - Crash Course Chemistry #6

687 views / 0 likes - added 9 years ago

Chemists need stoichiometry to make the scale of chemistry more understandable - Hank is here to explain why, and to teach us how to use it. Table of Contents Atomic Mass Units 2:24 Moles 5:12 Molar Mass 5:59 Equation Balancing 8:45 Molar Ratios 11:11 Cra
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Enthalpy: Crash Course Chemistry #18

1,136 views / 0 likes - added 9 years ago

Energy is like the bestest best friend ever and yet, most of the time we take it for granted. Hank feels bad for our friend and wants us to learn more about it so that we can understand what it's trying to tell us - like that any bond between two atoms co
13:41 Popular
Entropy: Embrace the Chaos! Crash Course Chemistry #20

781 views / 0 likes - added 9 years ago

Life is chaos and the universe tends toward disorder. But why? If you think about it, there are only a few ways for things to be arranged in an organized manner, but there are nearly infinite other ways for those same things to be arranged. Simple rules o
10:46 Popular
Polar&Non-Polar Molecules: Crash Course Chemistry #23

1,020 views / 1 likes - added 9 years ago

*** PLEASE WATCH WITH ANNOTATIONS ON! SOME INACCURACIES IN GRAPHICS ARE NOTED AND CORRECTED IN ANNOTATIONS. THANKS! *** Molecules come in infinite varieties, so in order to help the complicated chemical world make a little more sense, we classify and cate
11:38 Popular
Bonding Models and Lewis Structures: Crash Course Chemistry #24

710 views / 0 likes - added 9 years ago

Models are great, except they're also usually inaccurate. In this episode of Crash Course Chemistry, Hank discusses why we need models in the world and how we can learn from them... even when they're almost completely wrong. Plus, Lewis Structures! -- Tab
10:52 Popular
Orbitals: Crash Course Chemistry #25

888 views / 0 likes - added 9 years ago

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
11:04 Popular
Liquids: Crash Course Chemistry #26

748 views / 1 likes - added 9 years ago

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
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Solutions: Crash Course Chemistry #27

702 views / 0 likes - added 9 years ago

This week, Hank elaborates on why Fugu can kill you by illustrating the ideas of solutions and discussing molarity, molality, and mass percent. Also, why polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes. All that plus
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Doing Solids: Crash Course Chemistry #33

1,106 views / 0 likes - added 9 years ago

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.
11:20 Popular
The Black Legend, Native Americans, and Spaniards: Crash Course US History #1

932 views / 1 likes - added 9 years ago

In which John Green kicks off Crash Course US History! Why, you may ask, are we covering US History, and not more World History, or the history of some other country, or the very specific history of your home region? Well, the reasons are many. But, like
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The Quakers, the Dutch, and the Ladies: Crash Course US History #4

657 views / 2 likes - added 9 years ago

In which John Green teaches you about some of the colonies that were not in Virginia or Massachussetts. Old New York was once New Amsterdam. Why they changed it, I can say; ENGLISH people just liked it better that way, and when the English took New Amster
10:40 Popular
The Seven Years War and the Great Awakening: Crash Course US History #5

35.9k views / 309 likes - added 9 years ago

In which John Green teaches you about the beginnings of the American Revolution in a video titled The Seven Years War. Confusing? Maybe. John argues that the Seven Years War, which is often called the French and Indian War in the US, laid a lot of the gro
13:04 Popular
The Constitution, the Articles, and Federalism: Crash Course US History #8

1,078 views / 3 likes - added 9 years ago

In which John Green teaches you about the United States Constitution. During and after the American Revolutionary War, the government of the new country operated under the Articles of Confederation. While these Articles got the young nation through its wa
12:43 Popular
The War of 1812 - Crash Course US History #11

931 views / 1 likes - added 9 years ago

In which John Green teaches you about the War of 1812. The War of 1812 was fought between the United States and its former colonial overlord England. It started in, you guessed it 1812. The war lasted until 1815, and it resolved very little. John will tak
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14:11 Popular
The Market Revolution: Crash Course US History #12

786 views / 0 likes - added 9 years ago

In which John Green teaches you about the Market Revolution. In the first half of the 19th century, the way people lived and worked in the United States changed drastically. At play was the classic (if anything in a 30 year old nation can be called classi
12:01 Popular
The Civil War, Part I: Crash Course US History #20

1,318 views / 11 likes - added 9 years ago

In which John Green ACTUALLY teaches about the Civil War. In part one of our two part look at the US Civil War, John looks into the causes of the war, and the motivations of the individuals who went to war. The overarching causes and the individual motiva
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Reconstruction and 1876: Crash Course US History #22

1,023 views / 1 likes - added 9 years ago

In which John Green teaches you about Reconstruction. After the divisive, destructive Civil War, Abraham Lincoln had a plan to reconcile the country and make it whole again. Then he got shot, Andrew Johnson took over, and the disagreements between Johnson
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The Great Depression: Crash Course US History #33

1,895 views / 8 likes - added 9 years ago

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
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How and Why We Read: Crash Course English Literature #1

1,127 views / 2 likes - added 9 years ago

In which John Green kicks off the Crash Course Literature mini series with a reasonable set of questions. Why do we read? What's the point of reading critically. John will argue that reading is about effectively communicating with other people. Unlike a d
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Of Pentameter&Bear Baiting - Romeo&Juliet Part I: Crash Course English Literature #2

714 views / 0 likes - added 9 years ago

In which John Green examines Romeo&Juliet by William Shakespeare. John delves into the world of Bill Shakespeare's famous star-crossed lovers and examines what the play is about, its structure, and the context in which it was written. Have you ever wanted
10:26
PTSD and Alien Abduction - Slaughterhouse-Five Part 2: Crash Course Literature 213

668 views / 0 likes - added 9 years ago

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

1,433 views / 0 likes - added 9 years ago

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
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Water - Liquid Awesome: Crash Course Biology #2

1,645 views / 0 likes - added 9 years ago

Hank teaches us why water is one of the most fascinating and important substances in the universe. Follow SciShow on Twitter: http://www.twitter.com/scishow Like SciShow on Facebook: http://www.facebook.com/scishow Review: Re-watch = 00:00 Introduction =
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10:28 Popular
Plant Cells: Crash Course Biology #6

1,491 views / 1 likes - added 9 years ago

Hank describes why plants are so freaking amazing - discussing their evolution, and how their cells are both similar to&different from animal cells. Crash Course Biology now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-S
10:54 Popular
Animal Behavior - CrashCourse Biology #25

1,142 views / 0 likes - added 9 years ago

Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like Crash Course on Facebook: http://www.facebook.com/youtubecrashcour
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The Digestive System: CrashCourse Biology #28

1,073 views / 6 likes - added 9 years ago

Hank takes us through the bowels of the human digestive system and explains why it's all about surface area. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like Crash Course? http://www.facebook.com/youtubecrashcourse Follow Crash Cours
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Ecology - Rules for Living on Earth: Crash Course Biology #40

2,246 views / 0 likes - added 9 years ago

Hank introduces us to ecology - the study of the rules of engagement for all of us earthlings - which seeks to explain why the world looks and acts the way it does. The world is crammed with things, both animate and not, that have been interacting with ea
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09:35 Popular
Indus Valley Civilization: Crash Course World History #2

891 views / 1 likes - added 9 years ago

In which John Green teaches you about the Indus Valley Civilization, one of the largest of the ancient civilizations. John teaches you the who, how, when, where and why of the Indus Valley Civilization, and dispenses advice on how to be more successful in
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The Amazing Life and Strange Death of Captain Cook: Crash Course World History #27

813 views / 2 likes - added 9 years ago

In which John Green teaches you about the life and death of one of history's great explorers, Captain James Cook of the British Navy. He charted large swaths of the Pacific ocean, laid claim to Australia and New Zealand, and died a bizarre death in the Sa
11:55 Popular
The French Revolution: Crash Course World History #29

1,425 views / 3 likes - added 9 years ago

In which John Green examines the French Revolution, and gets into how and why it differed from the American Revolution. Was it the serial authoritarian regimes? The guillotine? The Reign of Terror? All of this and more contributed to the French Revolution
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Coal, Steam, and The Industrial Revolution: Crash Course World History #32

905 views / 1 likes - added 9 years ago

Mongols Shirts and Crash Course Posters! http://www.dftba.com/crashcourse In which John Green wraps up revolutions month with what is arguably the most revolutionary of modern revolutions, the Industrial Revolution. While very few leaders were beheaded in
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World War II: Crash Course World History #38

1,563 views / 4 likes - added 9 years ago

Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. In which John Green teaches you about World War II, aka The Great Patriotic War, aka The Big One. So how did this war happen? And wha
04:28 Popular
Sesame Street: House of Bricks (House of Cards Parody)

796 views / 0 likes - added 9 years ago

Some people say there's too much pork in this town. Frank Underwolf could not agree more. And that is why Mr. Underwolf is on a mission to huff and puff and blow down all the little pigs' houses. In this town, you have to know which way the wind is blowin
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Sesame Street: Catch the Cookie Thief!

937 views / 0 likes - added 9 years ago

There's a thief on the loose who has snatched up all the Cookie Art at the Cookie Museum. Who is the prime suspect? Why is the thief taking all the cookie art? Will Rachel Dratch and her posse of police penguins pin the perpetrator? Find out on PBS on Feb
01:14 Popular
Sesame Street: Number 4 (Number of the Day)

1,234 views / 1 likes - added 9 years ago

Number 4, you're what our hearts beat four. You're the number of squares and rectangles and rock and roll. Its so fun to count you , I think that's why musicians do! Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?a
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Sesame Street: Follow My Teacher

464 views / 0 likes - added 9 years ago

Once a week Sarah's mom takes her to yoga class. Sarah always follows the teacher for directions. Want to know why? Because following directions is what you do when you want to do things right. When you get back to school this year, make sure you follow d
03:31
Sesame Street: U/V Salesman

476 views / 0 likes - added 9 years ago

Hey Bud, we've had this letter U in our family for years, and we're gonna hate to do this but we've gotta sell it. What's that? You say you need a V? Why? What kinds of words start with the letter V? Are you interested in vegetables? or a Vespa scooter? a
03:30 Popular
Sesame Street: Michelle Obama&the Most Important Meal

1,010 views / 4 likes - added 9 years ago

Breakfast is the first meal of the day and it is a very important meal. That's why the First Lady, Michelle Obama, makes sure she eats breakfast even when she visits Sesame Street. So make time for breakfast, even if you're a very busy monster like Grover
05:48 Popular
Sesame Street: Confidence (Word on the Street Podcast)

951 views / 0 likes - added 9 years ago

Come on! Stand up straight! Smile and make eye contact. Be confident! Why? Because you're you and no one does a better job being you than you! You got this! Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=S
05:48 Popular
Sesame Street: Courteous (Word on the Street Podcast)

961 views / 1 likes - added 9 years ago

Being courteous is important when you are a wee little kiddo. Why, you may politely ask? Because it's important to be respectful and use manners and being polite when you are interacting with other people. Subscribe to the Sesame Street Channel here: http
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Sesame Street: What Begins with Letter I?

678 views / 0 likes - added 9 years ago

Isabella loves the letter I. Wanna know why? Well, her name begins with the Letter I. Additionally, words like ivy, igloo, ice cream, insect and ice cubes all begin with letter I. Aren't those words so fun? You can imagine why Isabella loves the letter I
01:46 Popular
Sesame Street: J is for Jump

774 views / 0 likes - added 9 years ago

From Venice to the Taj Mahal to the streets of the Big Apple, kids everywhere are jumping. Why? Because its so much fun! Have you tried it? Go ahead, just jump up and down! Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_c
03:27 Popular
Sesame Street: The Bert and Ernie Christmas Special with Tony Sirico and Steve Schirripa

712 views / 1 likes - added 9 years ago

Sometimes Bert and Ernie seem like a couple of wise guys and that's why they've hired actual wise guys, Tony Sirico and Steve Schirripa, to play themselves in this very festive Bert and Ernie Christmas Special. Subscribe to the Sesame Street Channel here:
01:42
Sesame Street: Elmo and Jesse Williams explain Furious

595 views / 0 likes - added 9 years ago

Have you ever been furious? It means to be really really angry. Jesse Williams and Elmo call on their pal Felix the Fly to explain why he's so furious. Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=Sesame
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Sesame Street: I Love My Hair Song (Mando's Spanish Version)

1,160 views / 1 likes - added 9 years ago

Is your hair frizzy or wavy or straight or curly or long or short or red or black or brown? Whatever it is, you should love your hair! It's a part of who you are. Listen to Mando sing about why he loves his hair! Watch the original: http://youtu.be/enpFde
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Sesame Street: Romeo Santos and Elmo sing "Quiero Ser Tu Amigo"

978 views / 0 likes - added 9 years ago

When you see somebody you'd like to get to know, why not just walk up to them with an hola or hello? Or you could just say "Quiero Ser Tu Amigo." That means "I want to be your friend" Romeo Santos and Elmo sing a song to help you make friends. Try it out
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Sesame Street: Peter Dinklage in Simon Says

510 views / 0 likes - added 9 years ago

Simon says "watch this." Why do we always have to do what Simon Says? Peter Dinklage explains in the song "Whatever Simon Says." Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=SesameStreet For more fun gam
02:16 Popular
Sesame Street: Telly is Jealous!

787 views / 3 likes - added 9 years ago

Baby Bear's pet parrot can count to six, speak fluent Spanish, AND make a fruit salad. Telly's pet hamster can't do any of that. Why is Telly so jealous of Baby Bear and his new pet? Gordon helps Telly recognize his feelings and gives him a strategy to co
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The Road Where Cars Roll Uphill | World's Strangest

772 views / 1 likes - added 9 years ago

There is a road in Scotland where bicyclists have to pedal hard to ride downhill... but then coast uphill. Why? | For more World's Strangest, visit http://www.sciencechannel.com/tv-shows/worlds-strangest/#mkcpgn=ytsci1 Catch World's Strangest Tuesdays at
03:16 Popular
Why Solar Storms Are So Dangerous | Strip the Cosmos

750 views / 1 likes - added 9 years ago

More than 20 solar storms a day can occur on the surface of the sun. These energy surges can cause real problems down on Earth. | For more STRIP THE COSMOS, visit http://www.sciencechannel.com/tv-shows/strip-the-cosmos/#mkcpgn=ytsci1 Subscribe to Science
05:05
Why Sitting Is Bad For You - Murat Dalkilinç

578 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/why-sitting-is-bad-for-you-murat-dalkilinc Sitting down for brief periods can help us recover from stress or recuperate from exercise. But nowadays,...
04:58 Popular
How Does Your Brain Respond To Pain? - Karen D. Davis

757 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/how-does-your-brain-respond-to-pain-karen-d-davis Everyone experiences pain -- but why do some people react to the same painful stimulus in different...
04:58
Why Do We Pass Gas? - Purna Kashyap

661 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/why-do-we-pass-gas-purna-kashyap Flatulence is a daily phenomenon. In fact, most human beings pass gas 10-20 times a day (yes, that includes you)....
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Why Is Ketchup So Hard To Pour? - George Zaidan

664 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/why-is-ketchup-so-hard-to-pour-george-zaidan Ever go to pour ketchup on your fries...and nothing comes out? Or the opposite happens, and your plate...
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11:39
The Ingenious Design of the Aluminum Beverage Can

611 views / 0 likes - added 9 years ago

Bill details the engineering choices underlying the design of a beverage can He explains why it is cylindrical, outlines the manufacturing steps needed to created the can, notes why the can narrows near it lid, show close ups of the double-seam that hold
15:33 Popular
Democracy, Authoritarian Capitalism, and China: Crash Course World History 230

895 views / 1 likes - added 9 years ago

In which John Green teaches you about the end of World History, and the end of the world as we know it, kind of. For the last hundred years or so, it seemed that one important ingredient for running an economically successful country was a western-style d
07:24
Superbugs: The Empire Strikes Bacteria

688 views / 0 likes - added 9 years ago

Check out GROSS SCIENCE: http://bit.ly/1DH5zbv Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart↓ More info and sources below ↓ Are we entering the post-antibiotic era? Antibiotic-resistant bacteria are on the rise, with millions of infections re
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07:05
The Recipe For Life…

609 views / 0 likes - added 9 years ago

We're cookin' in the primordial kitchen! Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart↓ More info and sources below ↓ If the human body could be distilled down into one molecule, what would our chemical formula be? And WHY is it that way? Is
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05:06 Popular
%$?# Allergies!

900 views / 0 likes - added 9 years ago

It’s the season for sneezin’! Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Springtime means the arrival of green grass, bright flowers, and buzzing bees. But for many of us, it’s also about sneezing, watery re
04:01 Popular
How Many Stars Are There?

1,018 views / 2 likes - added 9 years ago

Counting stars from the shore of the cosmic ocean… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ LIKE THE SHIRT I'M WEARING? It's glow in the dark! You can get it here (along with space undies and other good st
03:12 Popular
What Color Is The Universe?

1,605 views / 2 likes - added 9 years ago

Hint: It’s not black Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ When you stare up at the night sky, you might think that the universe is really black, but that’s just because our eyes aren’t sensitive enough
06:35 Popular
Attack Of The Zombie Parasites!

833 views / 3 likes - added 9 years ago

Did someone say BRAAAAAINS…? Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Shows like The Walking Dead are full of hungry, mindless, surprisingly fleet-footed armies of brain-eating zombies. Could they actually
04:47 Popular
Why Does February Only Have 28 Days?

951 views / 4 likes - added 9 years ago

It's not the size of the month that matters… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Why does February only get 28 days when all the other months get 30 or 31? The answer is part superstition, part politi
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07:23 Popular
Why Vaccines Work

914 views / 1 likes - added 9 years ago

A dose of reality about vaccines… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ As more and more parents are choosing not to vaccinate their children or are vaccinating them later, diseases like measles are mak
04:46 Popular
How Many Heartbeats Do We Get?

1,444 views / 1 likes - added 9 years ago

Science really gets my heart going… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart
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04:05
What Is Déjà Vu?!

539 views / 0 likes - added 9 years ago

I feel like I’ve seen this video before… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobe
05:13 Popular
5 Weird Involuntary Behaviors Explained!

768 views / 0 likes - added 9 years ago

Yawns, hiccups, twitchy eyes (and more) explained! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on In
05:02 Popular
There's No Such Thing As Cold

753 views / 1 likes - added 9 years ago

If cold isn’t real, then how can I feel it? Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram
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04:34 Popular
How Many Smells Can You Smell?

816 views / 0 likes - added 9 years ago

How do we smell? Great! Thanks for asking! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram:
06:34 Popular
Does My Dog Know What I'm Thinking?

864 views / 0 likes - added 9 years ago

Head to BrainCraft for more doggy science! http://youtu.be/OBy3idLwwYM Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesm
07:34 Popular
Why People Don't Believe In Climate Science

800 views / 0 likes - added 9 years ago

Watch Part 1:“The Facts” http://youtu.be/ffjIyms1BX4 Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on
06:20
Climate Science: What You Need To Know

650 views / 1 likes - added 9 years ago

Learn the basic science of climate change in 24 easy steps Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Foll
04:32 Popular
Where Do Birds Go In Winter?

901 views / 1 likes - added 9 years ago

And where do they keep their suitcases? Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: ht
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09:12 Popular
The Sixth Extinction

809 views / 2 likes - added 9 years ago

This time, we’re the asteroid. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://inst
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05:31
Why Are Some People Left-Handed?

683 views / 0 likes - added 9 years ago

The science of their sinister ways… Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http:/
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15:39 Popular
How To Draw Peppa Pig

1,789 views / 4 likes - added 9 years ago

Why I started Art For Kids Hub and more, come over to The Wired Homeschool and listen to my interview: http://bit.ly/afkhwired And a special thanks to our art friends that we featured today! Heather Collins and Sophie (rose vase): http://instagram.com/p/y
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03:42
How To See Time Travel!!!

586 views / 1 likes - added 9 years ago

Behold the COSMOTRON 5000!!! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instag
04:52 Popular
Why Does The Earth Have Layers?

1,261 views / 3 likes - added 9 years ago

…or why we live on an onion made of magma. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram:
06:29 Popular
Why Do Clouds Stay Up?

979 views / 2 likes - added 9 years ago

There’s nothing wrong with having your head in the clouds. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Foll
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03:59 Popular
A Slice Of Pizza Science!

1,171 views / 1 likes - added 9 years ago

How does math keep a folded slice from drooping? And what does pizza have to do with the speed of light?↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com How a 19th Century
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05:21 Popular
Bats: Guardians Of The Night

960 views / 9 likes - added 9 years ago

To see all the great bat action, please watch in HD!! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Visit Bat
06:03
The Physics Of Space Battles

678 views / 0 likes - added 9 years ago

How scientifically accurate is your favorite sci-fi space battle? Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.c
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05:45 Popular
What's The Deadliest Animal In The World?

852 views / 2 likes - added 9 years ago

Besides humans, of course. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Gates Foundation info on the world’s
03:11 Popular
Where Does The Smell Of Rain Come From?

895 views / 0 likes - added 9 years ago

I smell a science storm a-comin'!! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com References: “Nature of Argil
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04:51 Popular
What If There Were No Sharks?

2,065 views / 14 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Follow this link to more shark science videos by your favorite YouTubers!! http://bit.ly/1sugd0z↓ More info and sources below ↓ Follow on Twitter:
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06:10 Popular
The Oldest Living Things In The World

728 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow
02:02 Popular
The Sun Is A Magnet!

739 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Sunspots, solar flares, coronal mass ejections, OH MY! Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ F
04:46
How Your Body Knows Left From Right

650 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Why are our bodies so symmetrical, but our guts aren't?↓ More info and sources below ↓ Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub
04:14 Popular
You Are An Upside-Down Lobster

776 views / 1 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Here's why you aren't built like a lobster. Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ Follow on Tw
04:25 Popular
Why Your Brain Is In Your Head

792 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Check out BrainCraft: http://youtu.be/aucscX191vQ Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ Follow
05:54
The Delicious Science Of CHEESE!

559 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- There's science in cheese? You'd cheddar believe it. Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub Follow on Twitter: http://twitter.
12:23 Popular
Would Headlights Work At Light Speed?

724 views / 0 likes - added 9 years ago

If you were driving at the speed of light and turned on your headlights, what would happen? Twitter: http://www.twitter.com/tweetsauce Instagram: http://www.instagram.com/electricpants Sources and extras below!! Thanks to Jude for asking me this question
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Introduction To Intellectual Property: Crash Course IP 1

822 views / 0 likes - added 9 years ago

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
08:23 Popular
Is Ultron Inevitable?

822 views / 0 likes - added 9 years ago

Follow me to Vsauce3!! http://bit.ly/1zUxn7a Twitter: @okaytobesmart @jtotheizzoe Instagram: @jtotheizzoe↓ More info and sources below ↓ Will artificial intelligence ever surpass human intelligence? And if that happens, will AI be good or bad? Is evil AI
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Where Do Deleted Files Go?

743 views / 0 likes - added 9 years ago

Follow Michael Stevens for neat things every day! http://www.Twitter.com/tweetsauce LINKS AND SOURCES BELOW MUSIC BY: http://www.YouTube.com/JakeChudnow final song is "Midnight Sound" by Gareth Johnson / David O'Brien from: http://www.audionetwork.com Los
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Why Is It Harder To Drive Backwards?

512 views / 0 likes - added 9 years ago

Thanks to http://www.littlebits.com for supporting this episode of MinutePhysics – you can get $20 off an order of over $80 by using promo code MinutePhysics. And thanks to Shutterstock.com for providing us with access to their stock footage. MinutePhysic
03:29
Why Are Stars Star-Shaped?

586 views / 0 likes - added 9 years ago

Thanks to our Subbable subscriber SlugBooks.com - head over to http://www.slugbooks.com to find cheaper textbooks for college or university. And go to http://www.subbable.com/minutephysics if you want to support MinutePhysics on Subbable! And also to our
03:12
Why Is The Solar System Flat?

614 views / 0 likes - added 9 years ago

Thanks to Embry-Riddle Aeronautical University for supporting us on Subbable.com! - http://prescott.erau.edu A big thanks as well to Subbable supporters The Great Tobini (aka Tobyn Pearson) and Georgi Yanev! You make it possible for us to continue making
04:56 Popular
How to Learn to Code

1,061 views / 6 likes - added 9 years ago

Thanks to https://www.youtube.com/user/NerdyAndQuirky for the question! Shares appreciated! Twitters: https://twitter.com/cheerskevin There you go. Here’s the code that will get you past your first technical interview. By the way, don’t ever w
06:12 Popular
Could We Clone Ourselves?

1,002 views / 0 likes - added 9 years ago

Just be yourself! Or be your other self. Whichever. Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Is the science of Orphan Black realistic? Could we clone humans, or engineer them to have customized traits? We
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Copyright, Exceptions, And Fair Use: Crash Course Intellectual Property #3

728 views / 0 likes - added 9 years ago

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
10:01 Popular
Why You Should Embrace Your Stutter | Juan V. Lopez | TEDxUniversityofNevada

787 views / 1 likes - added 9 years ago

Juan V. Lopez is an MBA student at The University of Nevada. In this inspiring talk, Juan explains why he now embraces his stutter as an integral part of his unique self. Juan V López is a MBA Candidate at the University of Nevada, first-generation
29:18 Popular
Fire Log With Chemicals - YouTube Fireplace

773 views / 1 likes - added 9 years ago

This chemistry-style "Yule Log" is designed to enjoy (maybe in the background) over the festive period --- The good people from Chromecast supported the making of this video --- Why not warm up your holidays by casting this YouTube Fireplace from your sma
02:46
Two Colour Chemiluminescent Clock Reaction - Periodic Table Of Videos

570 views / 0 likes - added 9 years ago

More details in full description. Dr Sam Tang adds hydrogen peroxide to pyrogallol, formaldehyde and luminol. Chemiluminescence is caused by molecules being formed with some of their electrons in a higher energy level and then losing that energy as light.
02:44
Explosives Legend - Periodic Table Of Videos

520 views / 0 likes - added 9 years ago

The Professor oversees the installation of a "blue plaque" for the late great Colonel BD Shaw. See out-takes from this video (and why Brady gets angry at truck drivers) at: http://www.youtube.com/watch?v=LN7BLUWBuBI More chemistry at http://www.periodicvi
04:37
Sunlight Is Way Older Than You Think - Sten Odenwald

474 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/sunlight-is-way-older-than-you-think-sten-odenwald It takes light a zippy 8 minutes to reach Earth from the surface of the Sun. But how long does it take that same light to travel from the Sun’s core to its surf
04:22 Popular
Why Do Your Knuckles Pop? - Eleanor Nelsen

814 views / 3 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/why-do-your-knuckles-pop-eleanor-nelsen Some people love the feeling of cracking their knuckles, while others cringe at the sound. But what causes that trademark pop? And is it dangerous? Eleanor Nelsen gives th
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03:46 Popular
What Triggers A Chemical Reaction? - Kareem Jarrah

2,436 views / 3 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/what-triggers-a-chemical-reaction-kareem-jarrah Chemicals are in everything we see, and the reactions between them can look like anything from rust on a spoon to an explosion on your stovetop. But why do these r
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04:44 Popular
What Is The Heisenberg Uncertainty Principle? - Chad Orzel

1,596 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/what-is-the-heisenberg-uncertainty-principle-chad-orzel The Heisenberg Uncertainty Principle states that you can never simultaneously know the exact position and the exact speed of an object. Why not? Because ev
04:32 Popular
Why We Love Repetition In Music - Elizabeth Hellmuth Margulis

1,094 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/why-we-love-repetition-in-music-elizabeth-hellmuth-margulis How many times does the chorus repeat in your favorite song? How many times have you listened to that chorus? Repetition in music isn’t just a feature
04:35 Popular
What Causes Antibiotic Resistance? - Kevin Wu

1,528 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/how-antibiotics-become-resistant-over-time-kevin-wu Right now, you are inhabited by trillions of microorganisms. Many of these bacteria are harmless (or even helpful!), but there are a few strains of ‘super bact
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988 views / 0 likes - added 9 years ago

Watch my FIELD DAY video, “Home Sweet Whittier”: http://bit.ly/1QKKcuo And subscribe to FIELD DAY!! http://www.youtube.com/fieldday Jake and Kevin will be doing field days soon!! LINKS, SOURCES, and MORE are below: This video was shot in beautiful Buchare
04:08 Popular
What's The Loudest Possible Sound?

1,156 views / 2 likes - added 9 years ago

It’s definitely higher than “11” Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ What is the loudest possible sound? What about the quietest thing we can hear? And what do decibels measure, anyway? In this video
10:38 Popular
The Skeletal System: Crash Course A&P #19

2,033 views / 3 likes - added 9 years ago

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

648 views / 0 likes - added 9 years ago

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

1,077 views / 0 likes - added 9 years ago

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

2,252 views / 1 likes - added 9 years ago

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
04:30 Popular
What's An Engineer? Crash Course Kids #12.1

1,403 views / 3 likes - added 9 years ago

You've heard of Engineers, I'm sure. But, what are Engineers? Well, it turns out that they're all kinds of people doing all kinds of neat work! Want to be one? Well, join Sabrina in this episode of Crash Course Kids where she talks about what they do and
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04:53 Popular
Following The Sun: Crash Course Kids #8.2

1,948 views / 7 likes - added 9 years ago

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

1,522 views / 1 likes - added 9 years ago

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
05:17 Popular
The Engineering Process: Crash Course Kids #12.2

6,241 views / 15 likes - added 9 years ago

So, how do we go about being engineers? In this episode of Crash Course Kids, Sabrina talks to us about the Engineering Process and why we should do things in order, as well as many of the questions we should ask along the way. This first series is based
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02:59 Popular
Down To Earth: Crash Course Kids #4.2

1,629 views / 0 likes - added 9 years ago

In this episode of Crash Course Kids, Sabrina talks about why things on the bottom of the Earth, don't just fall off into space. Plus... PENGUINS! This first series is based on 5th grade science. We're super excited and hope you enjoy Crash Course Kids! /
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Defining Gravity: Crash Course Kids #4.1

1,970 views / 7 likes - added 9 years ago

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
06:17 Popular
The Fermi Paradox II — Solutions And Ideas – Where Are All The Aliens?

862 views / 2 likes - added 9 years ago

Where are all the aliens? The universe is too big and too old, why have we not met aliens yet? Do they live in computers? Were they wiped out by an ancient super intelligence? Or are we just to primitive to understand their motives? Whatever the answer is
06:22 Popular
The Fermi Paradox — Where Are All The Aliens? (1/2)

1,194 views / 1 likes - added 9 years ago

The universe is unbelievably big – trillions of stars and even more planets. Soo… there just has to be life out there, right? But where is it? Why don’t we see any aliens? Where are they? And more importantly, what does this tell us about our own fate in
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What’s The Big Deal With Gluten? - William D. Chey

669 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/what-s-the-big-deal-with-gluten-william-d-chey If you've been to a restaurant in the last few years, you’ve likely seen the words gluten-free written somewhere on the menu. But what exactly is gluten, and why ca
04:16 Popular
The Basics Of Freshwater: Crash Course Kids 14.1

1,977 views / 6 likes - added 8 years ago

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
05:11 Popular
Will We Ever Run Out Of Oil?

767 views / 2 likes - added 8 years ago

Check out our whole series on ENERGY! http://bit.ly/1BnH5zu Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ We’ve heard news of “peak oil” and “the end of the oil age” for years now, but we keep coming up with wa
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04:18 Popular
The Surprising Places We Waste Energy

1,101 views / 0 likes - added 8 years ago

Check out our whole series on ENERGY! http://bit.ly/1BnH5zu Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ We use a LOT of energy, but we waste a lot too. Where that waste happens might surprise, you though. We
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06:31 Popular
Did Dinosaurs Really Go Extinct?

1,180 views / 0 likes - added 8 years ago

Welcome to… Jurassic Pluck Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Most people are taught that dinosaurs went extinct 66 million years ago when a giant meteor crashed into the Yucatan peninsu
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05:22 Popular
The Essentials Of Energy

893 views / 1 likes - added 8 years ago

Check out our whole series on ENERGY! http://bit.ly/1BnH5zu Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ The world of energy is a confusing place. What’s better, nuclear or solar? What’s the difference between
03:25 Popular
Does The Moon Really Orbit The Earth?

1,361 views / 2 likes - added 8 years ago

What holds the moon up? Moonbeams! Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ According to Newton’s law of gravitation, the sun should “pull” way harder on the moon than the Earth does. So does the moon actu
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11:45 Popular
The Moon Terminator Illusion

947 views / 0 likes - added 8 years ago

http://www.twitter.com/tweetsauce http://instagram.com/electricpants Sources and sites to learn more below!!! dolly zoom effect: http://filmmakeriq.com/lessons/introduction-to-the-dolly-zoom/ visual angle: http://en.wikipedia.org/wiki/Angular_diameter htt
04:21 Popular
Why Are The Bees Dying?

1,572 views / 6 likes - added 8 years ago

If bees go, will they take us with them? Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Bees, wild and domesticated, are in big trouble. Bee colonies are dying off at alarming rates, and the cause i
05:39 Popular
Which Came First - Flowers Or Bees?

841 views / 2 likes - added 8 years ago

Stop and smell the flowers… and watch this video Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Bees and flowers have an amazingly close relationship. Flowers need bees in order to reproduce, and be
03:37 Popular
Up, Up & Away: Crash Course Kids #16.2

1,010 views / 0 likes - added 8 years ago

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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02:54 Popular
Why Raindrops Are Mathematically Impossible

1,425 views / 1 likes - added 8 years ago

Rain shouldn't happen, according to basic physics. Click here to watch the MinuteEarth video about rain: https://www.youtube.com/watch?v=87v_9Bud7vw This video supported by Audible.com/minutephysics Thanks to the following Subbable subscribers for making
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02:56 Popular
Gotta Eat! - Crash Course Kids 1.1

1,177 views / 2 likes - added 8 years ago

Welcome to Crash Course Kids. In this first episode, Sabrina takes a look at why all living things need to eat. Plus, she shows you a way to investigate why all living things need to eat. This first series is based on 5th grade science. We're super excite
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03:15
Why Are There Clouds?

645 views / 0 likes - added 8 years ago

Thanks to the awesome science YouTube channel Animalogic for supporting this video. Check them out! https://www.youtube.com/channel/UCwg6_F2hDHYrqbNSGjmar4w?sub_confirmation=1 Thanks also to our Patreon patrons: - @AntoineCoeur - Jeff Straathof - Mark - f
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02:48 Popular
Why Don't Scavengers Get Sick?

776 views / 1 likes - added 8 years ago

Thanks to Harry’s for supporting this video. Use the coupon code MINUTEEARTH for $5 off your order! https://www.harrys.com/ Thanks also to our Patreon patrons: - @AntoineCoeur - Mark - @TodayIFoundOut1 - Emil Kampp Please support MinuteEarth on Patreon: h
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02:28 Popular
Why Do We Only See One Side Of The Moon?

813 views / 0 likes - added 8 years ago

Thanks to squarespace.com for supporting this video. Go build a website! http://www.squarespace.com/minuteearth Thanks also to our Patreon patrons: - @AntoineCoeur - salar tel - @TodayIFoundOut1 - @82abhilash - Emil Kampp and our Subbable supporter: - @Gr
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06:01 Popular
Thomas Jefferson And The Giant Moose

1,006 views / 3 likes - added 8 years ago

E pluribus moose-um Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ America’s first great science battle wasn’t the space race or the atom bomb, it was fought between Thomas Jefferson, a French noble
05:14
Evaporative Cooling

584 views / 0 likes - added 8 years ago

Evaporative cooling. Why sweating cools you down.
11:56
Did The Past Really Happen?

679 views / 2 likes - added 8 years ago

Greece is full of wonderful new things and wonderful old things. But when WE become old things, will our ruins also be tourist attractions? **Sources and extra info below!!** me on twitter: http://www.twitter.com/tweetsauce on instagram: http://www.instag
09:48 Popular
COLD HARD SCIENCE.The Physics Of Skating On Ice (With SlowMo) - Smarter Every Day 110

727 views / 2 likes - added 8 years ago

Tweet this: http://bit.ly/IcePhysics -- FB it: http://bit.ly/IcePhys Download a free Audio book: http://bit.ly/AudibleSED Infographics are Here: http://smartereveryday.tumblr.com/ Figure skate, Hockey skate, and blade diagram Graphics by Kelly Richard. ht
06:26 Popular
Robot Butterflies FOR THE FUTURE - DEEP DIVE 3 - Smarter Every Day 106

925 views / 1 likes - added 8 years ago

Download the music from AShellInThePit: http://ashellinthepit.bandcamp.com/ Click to view Deep Dive #3 - Butterflies http://bit.ly/SED_3 Click here for more Information: ⇊⇊⇊⇊⇊⇊ Including info on the Butterfly Research Check it out! This research has been
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07:05
Why Are Bugs Attracted To Light? - Smarter Every Day 103

642 views / 1 likes - added 8 years ago

Download your free Audio Book Here: http://bit.ly/AudibleSED Seriously... it's a pretty cool way to support my video making habit. ⇊ Click to Expand! ⇊ Filmed on location in the Rainforests of Eastern Peru. I was on a tour run by Rainforest Expeditions (h
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02:40 Popular
Why Do People Go Bald?

858 views / 2 likes - added 8 years ago

How does balding work? Why does it happen? And why are men so much more likely to lose their hair than women? Quick Questions has the answers! Hosted by: Hank Green ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make Sci
01:52 Popular
Why Does Your Breath Stink In The Morning?

713 views / 1 likes - added 8 years ago

At night, your mouth becomes the perfect home for growing bacteria. Forgive us if we don’t talk to you until after you brush your teeth. ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out
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08:54 Popular
How Recycling Works

1,472 views / 5 likes - added 8 years ago

Join SciShow as we explore what happens to your stuff after you toss it into the little green bin with the arrows on it. ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove,
01:47 Popular
Why Does Music Make Us Feel?

918 views / 2 likes - added 8 years ago

"Music is the wallpaper of our minds" - Jamie Wheal Subscribe now! http://www.youtube.com/subscription_center?add_user=shotsofawe Join Jason Silva every week as he freestyles his way into the complex systems of society, technology and human existence and
02:06 Popular
We Don't Cry Because We're Sad

1,008 views / 1 likes - added 8 years ago

"The moment we cry in a film is not when things are sad but when they turn out to be more beautiful than we expected them to be." - Alain de Button More from Alain de Button http://alaindebotton.com Why Do We Cry When We Are Happy? https://www.psychologyt
03:32 Popular
The Science Of BACON!

763 views / 1 likes - added 8 years ago

Bacon bacon bacon bacon bacon! The Science of FOOD PORN: https://youtu.be/OKzNcuWMNkI Get a free audiobook! http://audible.com/asap GET OUR BOOK: http://asapscience.com/book/ Written by Mitchell Moffit and Greg Brown Instagram and Twitter: @whalewatchmepl
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02:35
Why Do We Blush When We're Embarrassed? - Big Questions - (Ep. 35)

699 views / 2 likes - added 8 years ago

A weekly show where we endeavor to answer one of your big questions. This week, Rennie DiCarlo asks, "Why do we blush when we're embarrassed?" -- Mental Floss Video on Twitter: http://www.twitter.com/mf_video Select Images and Footage provided by Shutters
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03:26 Popular
“Hey Bill Nye, What’s Science Good For Outside Of School?” #tuesdayswithbill

759 views / 0 likes - added 8 years ago

On this week's Tuesdays With Bill, Lillian has the whole summer ahead of her, and wants to know what kind of science-related activities she can do outside of the classroom. Do you want to ask Bill a question for a future "Tuesdays with Bill?" Click here t
06:43 Popular
Shelf Life Episode 8 - Voyage Of The Giant Squid

954 views / 1 likes - added 8 years ago

Getting a giant squid from New Zealand to New York is no easy feat. Curator Neil Landman tells the tale of a sizable specimen’s journey to the collections at the American Museum of Natural History, and Curator Mark Siddall explains why this giant cephalop
03:21 Popular
Why Do Some Species Thrive In Cities?

721 views / 1 likes - added 8 years ago

Urban development can be tough on wildlife. But some plants and animals are adapting to our cities in surprising ways. Thanks to squarespace.com for supporting this video. Go build a website! http://www.squarespace.com/minuteearth (use your 10% discount c
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04:09
Why Tomatoes Are Fruits, And Strawberries Aren't Berries

606 views / 2 likes - added 8 years ago

Did you know that bananas are berries, but strawberries aren’t? A lot of thought goes into classifying fruits and vegetables, and it all has to do with anatomy. ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow
02:53
Why Does Cilantro Taste Like Soap?

605 views / 0 likes - added 8 years ago

Cilantro tastes like soap to some people, but they may not just be picky. It could be genetic. Hosted by: Hank Green ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove, Just
02:16 Popular
Why Do Things Fade In The Sun?

911 views / 1 likes - added 8 years ago

Have you ever noticed that sunlight makes colors fade? Join Quick Questions as we explore why that happens. Hosted by: Hank Green ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Chr
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02:49 Popular
Why Is Only Half Of My Nose Working?

724 views / 0 likes - added 8 years ago

Ever notice how one side of your nose always seems to be more stuffed than the other? What’s up with that? Quick Questions knows! Hosted by: Hank Green ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without
02:04
Why Do Things Look Darker When They're Wet?

595 views / 0 likes - added 8 years ago

It’s kinda embarrassing when you spill stuff on your shirt and it makes a stain. So you might as well understand the science behind it, so at least you can act all smart and explain it to people. Hosted by: Michael Aranda Spill Man: Stefan Chin Angry Mob:
06:20 Popular
The Death Of Bees Explained – Parasites, Poison And Humans

1,395 views / 6 likes - added 8 years ago

In 2015 the bees are still dying in masses. Which at first seems not very important until you realize that one third of all food humans consume would disappear with them. Millions could starve. The foes bees face are truly horrifying – some are a direct c
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04:21 Popular
3 Reasons Why Nuclear Energy Is Awesome! 3/3

1,677 views / 3 likes - added 8 years ago

Nuclear energy might have a lot of unused potential. Not only is it one of the best mid term solutions for global warming bit despite what gut feeling tells us, it has saved millions of lives. By investing more into better technologies we might be able to
04:10 Popular
3 Reasons Why Nuclear Energy Is Terrible! 2/3

1,136 views / 3 likes - added 8 years ago

Nuclear energy might be a failed experiment. In over sixty years the technology has not only failed to keep its promise of cheap, clean and safe energy, it also caused major catastrophes and enabled more nuclear weapons while the nuclear waste problem is
05:57 Popular
What Is Life? Is Death Real?

1,007 views / 1 likes - added 8 years ago

So what is the difference between you and a rock? This seems like an easy, even stupid question. But even the smartest people on earth have no idea where to draw the line between living and dead things. Which leads to mind-blowing implications. What is li
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05:46 Popular
Is War Over? — A Paradox Explained

1,264 views / 6 likes - added 8 years ago

We live in the most peaceful time in human history. Wait, what? Seriously? That can't be right, there are more wars than ever! Well, no and they're killing fewer and fewer people, even though the world population is at an all-time high...and the numbers p
06:49 Popular
The Immune System Explained I – Bacteria Infection

1,482 views / 4 likes - added 8 years ago

Every second of your life you are under attack. Bacteria, viruses, spores and more living stuff wants to enter your body and use its resources for itself. The immune system is a powerful army of cells that fights like a T-Rex on speed and sacrifices itsel
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07:11
The History And Future Of Everything -- Time

637 views / 0 likes - added 8 years ago

How much time do you have left? Time makes sense in small pieces. But when you look at huge stretches of time, it's almost impossible to wrap your head around things. So we teamed up with the awesome blog "Wait but Why" and made this video to help you put
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03:34 Popular
How The Stock Exchange Works (For Dummies)

820 views / 1 likes - added 8 years ago

Why are there stocks at all? Everyday in the news we hear about the stock exchange, stocks and money moving around the globe. Still, a lot of people don't have an idea why we have stock markets at all, because the topic is usually very dry. We made a shor
06:12 Popular
Shelf Life Episode 7 - The Language Detectives

711 views / 0 likes - added 8 years ago

What does it take to solve a mystery about an ancient Native American language group? 16th-century missionary texts, DNA sequencing methods, and lots of algorithms. Curators Peter Whiteley and Ward Wheeler discuss their project to map the evolution of Uto
11:26 Popular
Why Are GMOs Bad?

1,128 views / 0 likes - added 8 years ago

Why are GMOs bad? They aren’t. They just aren’t, not intrinsically, and certainly not for your health. We’ve been eating them for decades with no ill effects, which makes sense, because a genetically modified organism is simply an organism, like every oth
02:34
What Causes Sunburns?

567 views / 0 likes - added 8 years ago

Why does too much sun turn some people’s skin all red and shiny? Quick Questions explains! ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove, Chris Peters, John Szymakowski
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01:56 Popular
Why Does Pepper Make You Sneeze?

864 views / 0 likes - added 8 years ago

It shouldn’t be up your nose in the first place, but if it is, SciShow can explain why it makes you sneeze. Hosted by: Hank Green ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Jus
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05:31 Popular
The Ebola Virus Explained — How Your Body Fights For Survival

986 views / 0 likes - added 8 years ago

What does the Ebola virus actually do in your body? Why is it so dangerous and why does it kill so many people? We take a look at the apocalyptic war that rages in the body after an infection by the Ebola virus and the soldiers fighting. Videos, explainin
06:23
Your Salad Is Trying To Kill You

653 views / 0 likes - added 8 years ago

The dose makes the poison… Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Plants are the most important source of nutrients for pretty much all of Earth's animals, and many of the planet's bacteria
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04:29 Popular
How Does A Canyon Become Grand?

1,499 views / 8 likes - added 8 years ago

And a very Grand Canyon it is… Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Thanks to Mike from PBS Idea Channel and Jamin from PBS Game/Show for hanging out at the Grand Canyon with me! https://w
01:36
Quick And Easy Voting For Normal People

656 views / 0 likes - added 8 years ago

CGP GREY HOODIE: http://goo.gl/Gypvhx Read about why you might want email from me: http://www.cgpgrey.com/blog/the-professional-sharer Discuss this video: http://www.reddit.com/r/cgpgrey Music by Broke for Free
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03:38 Popular
What If There Was A Black Hole In Your Pocket?

1,055 views / 1 likes - added 8 years ago

What would happen to you if a black hole the size of a coin suddenly appeared in your pocket? Lets find out! Check out www.Quarksandcoffee.com for more stuff like this video! Original reddit askscience post: http://bit.ly/1fLEHi6 Kurzgesagt Subreddit: htt
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04:01
Ice Spikes Explained

629 views / 0 likes - added 8 years ago

Why do spikes form on ice cubes? Without them the world would be vastly different. Awesome Jingle by Accent: http://bit.ly/AccentVe Thanks to Prof. Stephen Morris from UofT: http://bit.ly/1GFANBE Filmed in part by Martin Marek in Olomouc, Czech Republic T

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