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  • 10:14 The Earth: Crash Course Astronomy #11

    The Earth: Crash Course Astronomy #11

    464 views / 0 likes - added

    Phil starts the planet-by-planet tour of the solar system right here at home, Earth. -- Table of Contents Earth is a Planet 0:03 Layers of Earth 1:25 The Magnetic Field 5:10 Atmosphere and the Human Influence 6:14 -- PBS Digital Studios: http://youtube.co

  • 12:12 Introduction to Astronomy: Crash Course Astronomy #1

    Introduction to Astronomy: Crash Course Astronomy #1

    349 views / 1 likes - added

    Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?" -- Table of Contents: What is Astronomy? 3:00 Who Studie

  • 11:23 Everything, The Universe...And Life: Crash Course Astronomy #46

    Everything, The Universe...And Life: Crash Course Astronomy #46

    401 views / 1 likes - added

    Here it is, folks: the end. In our final episode of Crash Course Astronomy, Phil gives the course a send off with a look at some of his favorite topics and the big questions that Astronomy allows us to ask. Thank you for watching. -- Crash Course Astronom

  • 15:15 Deep Time: Crash Course Astronomy #45

    Deep Time: Crash Course Astronomy #45

    333 views / 0 likes - added

    As we approach the end of Crash Course Astronomy, it’s time now to acknowledge that our Universe’s days are numbered. Stars will die out after a few trillion years, protons will decay and matter will dissolve after a thousand trillion trillion trillion ye

  • 09:22 Pollution: Crash Course Ecology #11

    Pollution: Crash Course Ecology #11

    386 views / 0 likes - added

    Hank talks about the last major way humans are impacting the environment in this penultimate episode of Crash Course Ecology. Pollution takes many forms - from the simplest piece of litter to the more complex endocrine distruptors - and ultimately, humans

  • 12:00 Dark Matter: Crash Course Astronomy #41

    Dark Matter: Crash Course Astronomy #41

    261 views / 0 likes - added

    Today on Crash Course Astronomy, Phil dives into some very dark matters. The stuff we can actually observe in the universe isn’t all there is. Galaxies and other large structures in the universe are created and shifted by a force we detect mostly indirect

  • 12:26 Black Holes: Crash Course Astronomy #33

    Black Holes: Crash Course Astronomy #33

    465 views / 3 likes - added

    We’ve covered a lot of incredible stuff, but this week we’re talking about the weirdest objects in space: BLACK HOLES. Stellar mass black holes form when a very massive star dies, and its core collapses. The core has to be more than about 2.8 times the Su

  • 12:36 A Brief History Of The Universe: Crash Course Astronomy #44

    A Brief History Of The Universe: Crash Course Astronomy #44

    375 views / 0 likes - added

    Thanks to the wonders of physics, astronomers can map a timeline of the universe’s history. Today, Phil’s going to give you an overview of those first few minutes (yes, MINUTES) of the universe’s life. It started with a Big Bang, when the Universe was inc

  • 13:23 The Big Bang: Crash Course Astronomy #42

    The Big Bang: Crash Course Astronomy #42

    508 views / 0 likes - added

    Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the universe began - with a

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

    Star Clusters: Crash Course Astronomy #35

    227 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.

  • 11:21 Distances: Crash Course Astronomy #25

    Distances: Crash Course Astronomy #25

    274 views / 2 likes - added

    How do astronomers make sense out of the vastness of space? How do they study things so far away? Today Phil talks about distances, going back to early astronomy. Ancient Greeks were able to find the size of the Earth, and from that the distance to and th

  • 11:14 The Milky Way: Crash Course Astronomy #37

    The Milky Way: Crash Course Astronomy #37

    256 views / 0 likes - added

    Today we’re talking about our galactic neighborhood: The Milky Way. It’s a disk galaxy, a collection of dust, gas, and hundreds of billions of stars, with the Sun located about halfway out from the center. The disk has grand spiral patterns in it, formed

  • 12:03 Low Mass Stars: Crash Course Astronomy #29

    Low Mass Stars: Crash Course Astronomy #29

    291 views / 0 likes - added

    Today we are talking about the life -- and death -- of stars. Low mass stars live a long time, fusing all their hydrogen into helium over a trillion years. More massive stars like the Sun live shorter lives. They fuse hydrogen into helium, and eventually

  • 12:16 Nebulae: Crash Course Astronomy #36

    Nebulae: Crash Course Astronomy #36

    255 views / 1 likes - added

    Astronomers study a lot of gorgeous things, but nebulae might be the most breathtakingly beautiful of them all. Nebulae are clouds of gas and dust in space. They can glow on their own or reflect light from nearby stars. When they glow it’s usually predomi

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

    Seasons And The Sun: Crash Course Kids 11.1

    585 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

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

    Moon Phases: Crash Course Astronomy #4

    935 views / 2 likes - added

    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

  • 12:57 Neutron Stars: Crash Course Astronomy #32

    Neutron Stars: Crash Course Astronomy #32

    367 views / 0 likes - added

    In the aftermath of a 8 – 20 solar mass star’s demise we find a weird little object known as a neutron star. Neutrons stars are incredibly dense, spin rapidly, and have very strong magnetic fields. Some of them we see as pulsars, flashing in brightness as

  • 11:23 Dark Energy, Cosmology Part 2: Crash Course Astronomy #43

    Dark Energy, Cosmology Part 2: Crash Course Astronomy #43

    256 views / 0 likes - added

    The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy accelerates the expansion of space. We think this means the Universe will expand f

  • 11:17 Naked Eye Observations: Crash Course Astronomy #2

    Naked Eye Observations: Crash Course Astronomy #2

    346 views / 0 likes - added

    Today on Crash Course Astronomy, Phil invites you to head outside and take a look at all the incredible things you can see with your naked eye. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of the

  • 12:04 The Sun: Crash Course Astronomy #10

    The Sun: Crash Course Astronomy #10

    421 views / 1 likes - added

    Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our planet. This epis

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

    Why No Polar Pineapples: Crash Course Kids #11.2

    362 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

  • 15:35 Galaxies, Part 2: Crash Course Astronomy #39

    Galaxies, Part 2: Crash Course Astronomy #39

    267 views / 0 likes - added

    Active galaxies pour out lots of energy, due to their central supermassive black holes gobbling down matter. Galaxies tend not to be loners, but instead exist in smaller groups and larger clusters. Our Milky Way is part of the Local Group, and will one da

  • 12:17 High Mass Stars: Crash Course Astronomy #31

    High Mass Stars: Crash Course Astronomy #31

    310 views / 0 likes - added

    Massive stars fuse heavier elements in their cores than lower mass stars. This leads to the creation of heavier elements up to iron. Iron robs critical energy from the core, causing it to collapse. The shock wave, together with a huge swarm of neutrinos,

  • 11:33 Asteroids: Crash Course Astronomy #20

    Asteroids: Crash Course Astronomy #20

    349 views / 0 likes - added

    Now that we’ve finished our tour of the planets, we’re headed back to the asteroid belt. Asteroids are chunks of rock, metal, or both that were once part of smallish planets but were destroyed after collisions. Most orbit the Sun between Mars and Jupiter,

  • 10:17 Introduction to the Solar System: Crash Course Astronomy #9

    Introduction to the Solar System: Crash Course Astronomy #9

    527 views / 1 likes - added

    In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today. This episode is sponsored by Squaresp

  • 12:06 Galaxies, Part 1: Crash Course Astronomy #38

    Galaxies, Part 1: Crash Course Astronomy #38

    302 views / 0 likes - added

    The Milky Way is our neighborhood in the universe. It’s a galaxy and there are many others out there. Galaxies contain gas, dust, and billions of stars or more. They come in four main shapes: elliptical, spiral, peculiar, and irregular. Galaxies can colli

  • 12:01 Binary And Multiple Stars: Crash Course Astronomy #34

    Binary And Multiple Stars: Crash Course Astronomy #34

    343 views / 0 likes - added

    Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are actually part of binary or multiple systems. If they are close enough together they can actually t

  • 11:55 Comets: Crash Course Astronomy #21

    Comets: Crash Course Astronomy #21

    382 views / 0 likes - added

    Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long tail, and also releases dust that forms a different tail. We’ve visited comets

  • 11:50 Exoplanets: Crash Course Astronomy #27

    Exoplanets: Crash Course Astronomy #27

    269 views / 0 likes - added

    Today Phil explains that YES, there are other planets out there and astonomers have a lot of methods for detecting them. Nearly 2000 have been found so far. The most successful method is using transits, where a planet physically passes in front of its par

  • 08:56 Rotational Motion: Crash Course Physics #11

    Rotational Motion: Crash Course Physics #11

    347 views / 0 likes - added

    Get Your Crash Course Physics Mug here: http://store.dftba.com/products/crashcourse-physics-mug Did you know that, at a certain point on a moving wheel... there's no motion? I mean, kinda... it's all relative, right? Prepare to have your mind blown in thi

  • 14:05 Gamma-Ray Bursts: Crash Course Astronomy #40

    Gamma-Ray Bursts: Crash Course Astronomy #40

    324 views / 0 likes - added

    Gamma-ray bursts are not only incredible to study, but their discovery has an epic story all its own. Today Phil takes you through some Cold War history and then dives into what we know. Bursts come in two rough varieties: Long and short. Long ones are fr

  • 10:08 Central Nervous System: Crash Course A&P #11

    Central Nervous System: Crash Course A&P #11

    540 views / 1 likes - added

    Today Hank talks about your central nervous system. In this episode we'll explore how your brain develops and how important location is for each of your brain's many functions. Table of Contents Central Nervous System, Location and Brain Function 1:48 Bra

  • 10:01 Special Effects: Crash Course Film Production #11

    Special Effects: Crash Course Film Production #11

    224 views / 0 likes - added

    Chances are, when you hear the phrase "Special Effects," you may have images pop into your mind. The Hulk smashing a city, a lightsaber fight, or maybe an alien world. But effects can be much more subtle and have been around really since the beginning of

  • 11:50 How to Train a Brain - Crash Course Psychology #11

    How to Train a Brain - Crash Course Psychology #11

    590 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.

  • 11:22 Meteors: Crash Course Astronomy #23

    Meteors: Crash Course Astronomy #23

    308 views / 2 likes - added

    Today Phil helps keep you from ticking off an astronomer in your life by making sure you know the difference between a meteor, meteorite, and meteoroid. When the Earth plows through the stream emitted by a comet we get a meteor shower. Meteors burn up abo

  • 10:32 Eclipses: Crash Course Astronomy #5

    Eclipses: Crash Course Astronomy #5

    379 views / 0 likes - added

    The big question in the comments last week was, "BUT WHAT ABOUT ECLIPSES?" Today, Phil breaks 'em down for you. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse -- As promised, Phil's sun spotting recommendations: Astronome

  • 10:18 Mercury: Crash Course Astronomy #13

    Mercury: Crash Course Astronomy #13

    587 views / 5 likes - added

    Mercury is the closest planet to the sun. It has no atmosphere and is, as such, covered in craters. It's also incredibly hot but, surprisingly, has water ice hiding beneath its surface. -- Table of Contents Closest Planet to the Sun 0:03 Rotation Locked t

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  • 10:34 Light: Crash Course Astronomy #24

    Light: Crash Course Astronomy #24

    339 views / 0 likes - added

    In order to understand how we study the universe, we need to talk a little bit about light. Light is a form of energy. Its wavelength tells us its energy and color. Spectroscopy allows us to analyze those colors and determine an object’s temperature, dens

  • 09:47 Tides: Crash Course Astronomy #8

    Tides: Crash Course Astronomy #8

    414 views / 0 likes - added

    Today Phil explores the world of tides! What is the relationship between tides and gravity? How do planets and their moons become tidally locked? What would happen if you were 300km tall? Important questions. -- Gravity Over Distance 0:44 Tidal Force Para

  • 12:19 Popular Uranus & Neptune: Crash Course Astronomy #19

    Uranus & Neptune: Crash Course Astronomy #19

    1,016 views / 7 likes - added

    Today we’re rounding out our planetary tour with ice giants Uranus and Neptune. Both have small rocky cores, thick mantles of ammonia, water, and methane, and atmospheres that make them look greenish and blue. Uranus has a truly weird rotation and relativ

  • 10:50 Venus: Crash Course Astronomy #14

    Venus: Crash Course Astronomy #14

    524 views / 2 likes - added

    Venus is a gorgeous naked-eye planet, hanging like a diamond in the twilight -- but it’s beauty is best looked at from afar. Even though Mercury is closer to the sun, Venus is the hottest planet in the solar system, due to a runaway greenhouse effect, and

  • 11:10 White Dwarfs & Planetary Nebulae: Crash Course Astronomy #30

    White Dwarfs & Planetary Nebulae: Crash Course Astronomy #30

    223 views / 0 likes - added

    Today Phil follows up last week’s look at the death of low mass stars with what comes next: a white dwarf. White dwarfs are incredibly hot and dense objects roughly the size of Earth. They also can form planetary nebulae: huge, intricately detailed object

  • 12:16 Saturn: Crash Course Astronomy #18

    Saturn: Crash Course Astronomy #18

    472 views / 1 likes - added

    Saturn is the crown jewel of the solar system, beautiful and fascinating. It is a gas giant, and has a broad set of rings made of ice particles. Moons create gaps in the rings via their gravity. Saturn has dozens of moons, including Titan, which is as big

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

    Money And Finance: Crash Course Economics #11

    394 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

  • 10:03 The Gravity of the Situation: Crash Course Astronomy #7

    The Gravity of the Situation: Crash Course Astronomy #7

    370 views / 0 likes - added

    In today's episode, Phil looks at how gravity plays out across the universe. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse -- Gravity is a Force 2:17 Different Types of Orbit 3:41 Escape Velocity 5:30 Weightless Mass 7:0

  • 14:08 DNA, Hot Pockets,&The Longest Word Ever: Crash Course Biology #11

    DNA, Hot Pockets,&The Longest Word Ever: Crash Course Biology #11

    404 views / 0 likes - added

    Hank imagines himself breaking into the Hot Pockets factory to steal their secret recipes and instruction manuals in order to help us understand how the processes known as DNA transcription and translation allow our cells to build proteins. Crash Course B

  • 09:38 Casual Gaming: Crash Course Games #11

    Casual Gaming: Crash Course Games #11

    229 views / 0 likes - added

    Today, we’re moving on from game consoles to talk about a bigger shift that was happening in the gaming industry. In the mid 2000s, we saw a proliferation of Internet accessible devices and with them gaming would expand to a new audience. We’re going to t

  • 12:01 Telescopes: Crash Course Astronomy #6

    Telescopes: Crash Course Astronomy #6

    350 views / 0 likes - added

    Today Phil explains how telescopes work and offers up some astronomical shopping advice. -- How Telescopes Work 1:07 Refractors vs Reflectors 2:50 Technology and the Light Spectrum 7:45 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow P

  • 10:44 Jupiter: Crash Course Astronomy #16

    Jupiter: Crash Course Astronomy #16

    473 views / 3 likes - added

    Jupiter is the biggest planet in our solar system. The gas giant is NOT a failed star, but a really successful planet! It has a dynamic atmosphere with belts and zones, as well as an enormous red spot that’s actually a persistent hurricane. Jupiter is sti

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

    Presidential Power: Crash Course Government and Politics #11

    368 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

  • 10:12 Mars: Crash Course Astronomy #15

    Mars: Crash Course Astronomy #15

    421 views / 3 likes - added

    The fourth planet from the sun and the outermost of the terrestrial planets, Mars has long been a popular spot for missions and imagination. Phil walks you through the planet's topography, core, and features. We'll take a look back to Mars's past and make

  • 09:29 Cycles in the Sky: Crash Course Astronomy #3

    Cycles in the Sky: Crash Course Astronomy #3

    304 views / 0 likes - added

    This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of

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

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

    245 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

  • 02:59 Popular Down To Earth: Crash Course Kids #4.2

    Down To Earth: Crash Course Kids #4.2

    1,020 views / 0 likes - added

    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! /

  • 10:41 Stars: Crash Course Astronomy #26

    Stars: Crash Course Astronomy #26

    310 views / 0 likes - added

    Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots stars’ luminosity

  • 09:34 Intelligent Design: Crash Course Philosophy #11

    Intelligent Design: Crash Course Philosophy #11

    325 views / 0 likes - added

    Last week we introduced Thomas Aquinas’s four cosmological arguments for the existence of god; today we introduce his fifth argument: the teleological argument, and the ensuing dialogue it initiated. -- Bokeh Spiral by Eric Wüstenhagen: https://www.flickr

  • 11:06 Brown Dwarfs: Crash Course Astronomy #28

    Brown Dwarfs: Crash Course Astronomy #28

    296 views / 0 likes - added

    While Jupiter is nowhere near massive enough to initiate fusion in its core, there are even more massive objects out there that fall just short of that achievement as well called brown dwarfs. Brown dwarfs, have a mass that places them between giant plane

  • 11:52 Programming Languages: Crash Course Computer Science #11

    Programming Languages: Crash Course Computer Science #11

    324 views / 0 likes - added

    Get your first two months of Curiosity Stream free by going to http://curiositystream.com/crashcourse and using the promo code “crashcourse”. So we ended last episode with programming at the hardware level with things like plugboards and huge panels of sw

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  • 10:30 Jupiter's Moons: Crash Course Astronomy #17

    Jupiter's Moons: Crash Course Astronomy #17

    424 views / 0 likes - added

    Before moving on from Jupiter to Saturn, we’re going to linger for a moment on Jupiter’s moons. There are 67 known moons, and 4 huge ones that we want to explore in greater detail. Ganymede is the largest - larger, in fact, than any other moon in the sola

  • 11:41 The Oort Cloud: Crash Course Astronomy #22

    The Oort Cloud: Crash Course Astronomy #22

    323 views / 0 likes - added

    Now that we’re done with the planets, asteroid belt, and comets, we’re heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system. The Kuiper Belt i

  • 10:43 How To Speak Chemistrian: Crash Course Chemistry #11

    How To Speak Chemistrian: Crash Course Chemistry #11

    234 views / 0 likes - added

    Learning to talk about chemistry can be like learning a foreign language, but Hank is here to help with some straightforward and simple rules to help you learn to speak Chemistrian like a native. Table of Contents Determining Formulas and Names of Monatom

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

    Earth's Rotation & Revolution: Crash Course Kids 8.1

    613 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

  • 11:37 Christianity from Judaism to Constantine: Crash Course World History #11

    Christianity from Judaism to Constantine: Crash Course World History #11

    277 views / 0 likes - added

    In which John Green teaches you the history of Christianity, from the beginnings of Judaism and the development of monotheism, right up to Paul and how Christianity stormed the Roman Empire in just a few hundred years. Along the way, John will cover Abram

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

    What On Earth: Crash Course Kids #10.1

    574 views / 0 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

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

    What On Earth: Crash Course Kids #10.1

    99 views / 1 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

  • 02:58 How A Meteorite Crash Ended The Age Of Dinosaurs | Life Of Earth From Space

    How A Meteorite Crash Ended The Age Of Dinosaurs | Life Of Earth From Space

    50 views / 1 likes - added

    Experts detail and speculate how a meteorite crash contributed towards the extinction of dinosaurs on planet Earth. Subscribe to Discovery UK for more great clips:http://www.youtube.com/subscription_center?add_user=DiscoveryTVFollow Discovery UK on Twitte

  • 10:26 Ecology - Rules for Living on Earth: Crash Course Biology #40

    Ecology - Rules for Living on Earth: Crash Course Biology #40

    682 views / 0 likes - added

    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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  • 12:43 The War of 1812 - Crash Course US History #11

    The War of 1812 - Crash Course US History #11

    398 views / 0 likes - added

    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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  • 14:33 The Sun&The Earth: Crash Course Big History #3

    The Sun&The Earth: Crash Course Big History #3

    415 views / 1 likes - added

    In which John Green, Hank Green, and Emily Graslie teach you about our Sun, and the formation of the planets. We're going to focus on the formation and development of the Earth, because that's where people live. You'll learn about the Solar nebula, the bi

  • 02:25 Stephen Hawking: We Must Leave Earth To Survive | Expedition New Earth | Earth Lab

    Stephen Hawking: We Must Leave Earth To Survive | Expedition New Earth | Earth Lab

    123 views / 0 likes - added

    Stephen Hawking predicts humans must be prepared to leave earth in the next 100 years if we are to survive. This video is to promote the program Expedition New Earth, part of the Being Human season on BBC Earth. Subscribe to Earth Lab for more fascinating

  • 13:37 The History Of Life On Earth - Crash Course Ecology #1

    The History Of Life On Earth - Crash Course Ecology #1

    436 views / 0 likes - added

    With a solid understanding of biology on the small scale under our belts, it's time for the long view - for the next twelve weeks, we'll be learning how the living things that we've studied interact with and influence each other and their environments. Li

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  • 06:51 How The Moon Affects Our Lives On Earth | Space on Earth | BBC Earth

    How The Moon Affects Our Lives On Earth | Space on Earth | BBC Earth

    20 views / 0 likes - added

    Our Moon is far more than just a lump of rock floating through space. @hashemalghaili visits the Royal Observatory in London to find out about our lunar neighbour.Subscribe: http://bit.ly/BBCEarthSub #TheMoon #Space #UniverseWatch more: Planet Earth http:

  • 03:37 Plankton. The Most Vital Organisms On Earth - World Oceans Day - BBC Earth

    Plankton. The Most Vital Organisms On Earth - World Oceans Day - BBC Earth

    476 views / 2 likes - added

    Happy World Oceans Day! Click here to watch our SpongeBob SquarePants video https://www.youtube.com/watch?v=WLNe3TutnNM The BBC Earth Unplugged team take over BBC Earth to delve a little deeper into why plankton are the most important organisms on the pla

  • 03:45 Swarm Of Locusts Devour Everything In Their Path - Planet Earth - BBC Earth

    Swarm Of Locusts Devour Everything In Their Path - Planet Earth - BBC Earth

    559 views / 0 likes - added

    Stunning footage of one of Planet Earth's greatest spectacles, the swarm of the Desert Locust - Eggs that have remained in the ground for twenty years now begin to hatch. Considering that an adult Locust can eat its entire body weight everyday, it's hardl

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  • 02:47 Planet Earth II: Official Extended Trailer - BBC Earth

    Planet Earth II: Official Extended Trailer - BBC Earth

    378 views / 1 likes - added

    10 years ago Planet Earth changed our view of the world. Now we take you closer than ever before. This is life in all its wonder. This is Planet Earth II. A decade ago, the landmark television series Planet Earth redefined natural history filmmaking, givi

  • 04:04 17 Year Periodical Cicadas - Planet Earth - BBC Earth

    17 Year Periodical Cicadas - Planet Earth - BBC Earth

    409 views / 0 likes - added

    The biggest insect emergence on the planet is underway - after an absence of 17 years the next batch of Periodical Cicadas will grace the Forest for just a mere few days. For the Turtle and other Forest inhabitants this will be one very rare but ultimatel

  • 02:45 Skip Counting By 11 Song | The 11 Times Table Song For Kids

    Skip Counting By 11 Song | The 11 Times Table Song For Kids

    169 views / 1 likes - added

  • 03:43 Gliding Leaf Frogs - Planet Earth - BBC Earth

    Gliding Leaf Frogs - Planet Earth - BBC Earth

    307 views / 1 likes - added

    Breathtaking slow motion footage of the male Gliding Leaf Frog taking flight. In slowing his descent he uses his extra large webbed feet like a Parachute. It is later on when it comes to mating that we learn these feet serve an entirely different purpose.

  • 03:01 Sailfish Are Master Hunters - Planet Earth - BBC Earth

    Sailfish Are Master Hunters - Planet Earth - BBC Earth

    317 views / 0 likes - added

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  • 01:38 Earth: One Amazing Day - BBC Earth

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  • 08:04 How Do Satellites Help Us Communicate? | Space on Earth | BBC Earth

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  • 02:46 Eagle Eyes Vlog#11 Hooplakidz Lab

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  • 01:29 Pink River Dolphins Of The Amazon Rainforest's Hunting Secret | Earth's Great Rivers |  BBC Earth

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  • 02:13 Shaolin Kung Fu Training: Spectacular Display Caught From Satellite | Earth From Space | BBC Earth

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  • 02:57 Turtle Travels Through Desert | Earth From Space | BBC Earth

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  • 04:56 Ecuador's Melting Mountain | Earth From Space Web Exclusive | Earth Unplugged

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  • 03:46 Voyager 2's 11 billion mile journey at a human scale

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    363 views / 0 likes - added

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  • 10:35 Minecraft 1.11 | ULTIMATE ITEM TRANSPORTATION!!

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  • 16:11 11 Levels of Origami: Easy to Complex | WIRED

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  • 10:51 The Video Game Crash Of 1983: Crash Course Games #6

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    314 views / 0 likes - added

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    Everything Revolves Around You: Crash Course Kids #22.1

    393 views / 0 likes - added

    So, why doesn't the moon just crash into the Earth? And why doesn't the Earth crash into the Sun? What are orbits exactly and why do they happen? Well, it has to do with gravity and velocity. In this episode of Crash Course Kids, Sabrina talks to us about

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    139 views / 0 likes - added

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  • 08:00 Will a Levitating Earth Spin Forever in a Vacuum Chamber? The Earth in Space Experiment

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    215 views / 3 likes - added

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  • 06:02 Total Solar Eclipse: 360 VR Video Seen From Space | Earth From Space | BBC Earth

    Total Solar Eclipse: 360 VR Video Seen From Space | Earth From Space | BBC Earth

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  • 10:19 Everything NEW added in Minecraft 1.11

    Everything NEW added in Minecraft 1.11

    85 views / 4 likes - added

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    248 views / 0 likes - added

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  • 04:02 How To Draw A Slurpee 7-11

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    116 views / 0 likes - added

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  • 01:51 How the popsicle was invented | Moments of Vision 11 - Jessica Oreck

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  • 12:13 11 Brain Teasers To Test Your Keen Eye And Analytical Mind

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    575 views / 1 likes - added

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  • 01:52 11-Year-Old Gets 3D-Printed Hands After Dad Meets Engineering Student in Uber

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    An 11-year-old girl born with a one finger on each hand has gotten a new pair of 3D-printed hands. Her father drives an Uber and after picking up a Notre Dame engineering student one night, the stranger offered to help the driver's daughter by designing h

  • 14:27 Peace Out Guided Relaxation for Kids | 11. Superhero Flying

    Peace Out Guided Relaxation for Kids | 11. Superhero Flying

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  • 03:04 Popular 11 Amazing & Mind Blowing Facts About The Human Eye By HooplaKidzLab

    11 Amazing & Mind Blowing Facts About The Human Eye By HooplaKidzLab

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  • 10:58 SHAKE BREAK Plus MORE! | 11 Minute Exercise For Kids | Pancake Manor

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    487 views / 1 likes - added

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  • 04:17 The Most Important Astronomy Picture Ever Taken

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    286 views / 0 likes - added

    http://gplus.to/TonyDarnell http://twitter.com/DeepAstronomy http://facebook.com/SpaceFan I've recently discovered an animation that was rendered using the measured redshift of all 10,000 galaxies in the Hubble Ultra Deep Field image. I've written a short

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  • 03:50 Sundials = Astronomy with a Stick!

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    142 views / 1 likes - added

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  • 02:03 What Apollo 11 Astronaut Michael Collins Feared Most

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    The Great Escape: Crash Course Kids #13.1

    535 views / 2 likes - added

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    311 views / 0 likes - added

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

    The Basics Of Freshwater: Crash Course Kids 14.1

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  • 03:25 Did Earth Always Have Water?

    Did Earth Always Have Water?

    534 views / 1 likes - added

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  • 14:27 Popular The Great Depression: Crash Course US History #33

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  • 09:47 Magnetism: Crash Course Physics #32

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    433 views / 0 likes - added

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    Decoding the ancient astronomy of Stonehenge

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  • 08:17 11 Dinners And Desserts You Can Make In A Microwave  Tasty

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

    Danger! Falling Objects: Crash Course Kids #32.1

    519 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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  • 32:18 A Mickey Mouse Cartoon : Season 1 Episodes 11-18 | Disney Shorts

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  • 05:29 An Interstellar Asteroid Just Flew Past Earth, Here’s What You Need to Know

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    190 views / 1 likes - added

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  • 04:01 Astronaut Experiment: Crash Course Kids #32.2

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  • 13:41 Migrations and Intensification: Crash Course Big History #7

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    362 views / 0 likes - added

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  • 01:48 How Deforestation Looks From Space | Earth From Space | BBC Earth

    How Deforestation Looks From Space | Earth From Space | BBC Earth

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  • 32:22 A Mickey Mouse Cartoon : Season 2 Episodes 11-19 | Disney Shorts

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    416 views / 1 likes - added

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

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    311 views / 0 likes - added

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  • 04:40 Apollo 11's Legacy in Pop Culture | The Moon Landing in TV and Movies

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    154 views / 0 likes - added

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    The 1995 Hubble photo that changed astronomy

    317 views / 0 likes - added

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  • 03:57 This Could Be the End of Urban Astronomy (360 Video)

    This Could Be the End of Urban Astronomy (360 Video)

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    Crash Course Economics Intro!

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  • 10:05 Is There Life on Earth?

    Is There Life on Earth?

    105 views / 0 likes - added

    I mean… how do you really know? SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ If we lived light years from Earth, how would we know there’s life here? Let’s take a look at the search for extraterrestri

  • 29:08 The Remarkable Science of Ancient Astronomy | The Great Courses

    The Remarkable Science of Ancient Astronomy | The Great Courses

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  • 10:02 Ecological Succession: Change Is Good - Crash Course Ecology #6

    Ecological Succession: Change Is Good - Crash Course Ecology #6

    278 views / 0 likes - added

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

    Up, Up & Away: Crash Course Kids #16.2

    453 views / 0 likes - added

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  • 14:02 11 SIMPLE ORIGAMI IDEAS FOR KIDS

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  • 09:21 Astrophysics and Cosmology: Crash Course Physics #46

    Astrophysics and Cosmology: Crash Course Physics #46

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

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  • 02:59 Apollo 11 Astronauts Share Their First Impressions Of The Moon | Apollo: The Forgotten Films

    Apollo 11 Astronauts Share Their First Impressions Of The Moon | Apollo: The Forgotten Films

    45 views / 0 likes - added

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  • 05:04 Skylight: Why Does Earth Have Seasons?

    Skylight: Why Does Earth Have Seasons?

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  • 06:22 Ben 10 | Ben vs. Kevin 11 Best Fights | Cartoon Network

    Ben 10 | Ben vs. Kevin 11 Best Fights | Cartoon Network

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  • 11:11 Adam Savage Meets Neil Armstrong's Apollo 11 Spacesuit!

    Adam Savage Meets Neil Armstrong's Apollo 11 Spacesuit!

    45 views / 0 likes - added

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    TED-Ed Earth Day Medley

    467 views / 0 likes - added

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    Do We REALLY Need To Sleep? | Earth Lab

    90 views / 0 likes - added

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    Land And Water: Crash Course Kids #16.1

    517 views / 0 likes - added

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    How To Draw The Earth As A Heart

    206 views / 0 likes - added

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    How Power Gets to Your Home: Crash Course Physics #35

    214 views / 0 likes - added

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    Here Comes The Sun: Crash Course Kids #5.1

    750 views / 3 likes - added

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    Resources: Welcome To The Neighborhood - Crash Course Kids #2.1

    557 views / 0 likes - added

    Welcome to the Neighborhood! Humans need a lot of things to survive (I'm sure you've noticed). We need food, water, and shelter and it takes a lot of resources to get all of those things. What are resources? In this episode of Crash Course Kids, Sabrina t

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    Specialization And Trade: Crash Course Economics #2

    844 views / 1 likes - added

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    Water Fix!: Crash Course Kids #36.2

    419 views / 0 likes - added

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  • 07:10 TOUGH Interview Question - Ways To Give 11 Coins To 3 People

    TOUGH Interview Question - Ways To Give 11 Coins To 3 People

    266 views / 0 likes - added

    How many ways can you divide 11 coins to 3 people? How many ways are there if each person has to get at least 1 coin? This puzzle is an example of a technical interview question. The video demonstrates the solution, which indicates the number of non-negat

  • 08:59 Special Relativity: Crash Course Physics #42

    Special Relativity: Crash Course Physics #42

    290 views / 0 likes - added

    This episode of Crash Course Physics is supported by Prudential. Go to www.raceforretirement.com to learn how, if you start saving today, you can continue to enjoy the things you love tomorrow. So we've all heard of relativity, right? But... what is relat

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

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

    460 views / 0 likes - added

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    Circuit Analysis: Crash Course Physics #30

    297 views / 0 likes - added

    How does Stranger Things fit in with Physics and, more specifically, circuit analysis? I'm glad you asked! In this episode of Crash Course Physics, Shini walks us through the differences between series and parallel circuits and how that makes Christmas li

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    How To Get Resources - Picky Pineapples: Crash Course Kids #2.2

    409 views / 0 likes - added

    Want a Pineapple? If you want a pineapple, it's possible you can just run down to the store and get one. But, if you wanted to grow one, that's a lot more difficult depending on where you live. In this episode of Crash Course Kids, Sabrina talks about how

  • 03:35 How do We Burn Calories? | Earth Lab

    How do We Burn Calories? | Earth Lab

    131 views / 0 likes - added

    How does our stomach break down and burn calories? Subscribe: http://bit.ly/SubscribeToEarthLab All the best Earth Lab videos http://bit.ly/EarthLabOriginals Best of BBC Earth videos http://bit.ly/TheBestOfBBCEarthVideos The Doctors Are In The House http:

  • 06:29 Is There Poo Everywhere? | Earth Lab

    Is There Poo Everywhere? | Earth Lab

    107 views / 0 likes - added

    95% of paper currency has a trace of faecal matter! Greg Foot investigates the grim topic of atomised poo. Subscribe to Earth Lab: http://bit.ly/SubscribeToEarthLab Best Earth Lab videos http://bit.ly/EarthLabOriginals 1 http://www.umass.edu/mycenter/docu

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    Temperature: Crash Course Physics #20

    251 views / 0 likes - added

    Welcome to the new Crash Course Physics Studio! This episode of Crash Course Physics is sponsored by Audible.com. You can go to http://audible.com/crashcourse to get a 30 day trial and help us out as well! Get Your Crash Course Physics Mug here: https://s

  • 03:33 Does Earth Come Back To The Same Spot In Space Every Year On Your Birthday?

    Does Earth Come Back To The Same Spot In Space Every Year On Your Birthday?

    120 views / 0 likes - added

    Since Earth completes one revolution around the sun in 1 year, it would make sense to think that after the completion of year, Earth would be exactly at the same spot where it was at the beginning of the year, wouldn't it? But is it actually true? Does Ea

  • 06:39 Where Do Waves Come From? Earth Lab

    Where Do Waves Come From? Earth Lab

    82 views / 0 likes - added

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  • 10:36 Optical Instruments: Crash Course Physics #41

    Optical Instruments: Crash Course Physics #41

    222 views / 0 likes - added

    This episode of Crash Course Physics is supported by Prudential. Go to www.raceforretirement.com to learn how, if you start saving today, you can continue to enjoy the things you love tomorrow. How do lenses work? How do they form images? Well, in order t

  • 13:29 Life Begins: Crash Course Big History #4

    Life Begins: Crash Course Big History #4

    449 views / 0 likes - added

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    Induction - An Introduction: Crash Course Physics #34

    199 views / 0 likes - added

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  • 04:11 How to Improve Your Memory | Earth Lab

    How to Improve Your Memory | Earth Lab

    86 views / 0 likes - added

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  • 09:45 Light Is Waves: Crash Course Physics #39

    Light Is Waves: Crash Course Physics #39

    320 views / 1 likes - added

    The way light behaves can seem very counter intuitive, and many physicists would agree with that, but once you figure out light waves it all starts to make more sense! In this episode of Crash Course Physics, Shini shows us how we know that light exists a

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    When will we Drive Autonomous Cars? | Earth Lab

    131 views / 0 likes - added

    When will self driving cars be safe enough to be used on the road? Greg Foot looks into the future of transport. Subscribe: http://bit.ly/SubscribeToEarthLab All the best Earth Lab videos http://bit.ly/EarthLabOriginals Best of BBC Earth videos http://bit

  • 06:49 Are There Oceans In Space? | Earth Lab

    Are There Oceans In Space? | Earth Lab

    90 views / 0 likes - added

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    How do we get the Caffeine OUT of Coffee? | Earth Lab

    163 views / 0 likes - added

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    Water and Solutions -- for Dirty Laundry: Crash Course Chemistry #7

    369 views / 0 likes - added

    Dihydrogen monoxide (better know as water) is the key to nearly everything. It falls from the sky, makes up 60% of our bodies, and just about every chemical process related to life takes place with it or in it. Without it, none of the chemical reactions t

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    Measuring Personality: Crash Course Psychology #22

    467 views / 1 likes - added

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  • 02:02 Flying Over The Cloud Forest Of Mexico - Wilderness Sessions - BBC Earth

    Flying Over The Cloud Forest Of Mexico - Wilderness Sessions - BBC Earth

    345 views / 1 likes - added

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  • 10:04 The Hydrologic And Carbon Cycles: Always Recycle! - Crash Course Ecology #8

    The Hydrologic And Carbon Cycles: Always Recycle! - Crash Course Ecology #8

    243 views / 0 likes - added

    Hank introduces us to biogeochemical cycles by describing his two favorites: carbon and water. The hydrologic cycle describes how water moves on, above, and below the surface of the Earth, driven by energy supplied by the sun and wind. The carbon cycle do

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    The Creation of Chemistry - The Fundamental Laws: Crash Course Chemistry #3

    241 views / 0 likes - added

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  • 03:48 How do we Skate on Ice? | Earth Lab

    How do we Skate on Ice? | Earth Lab

    167 views / 0 likes - added

    What's the science behind ice skating? An experiment demonstrates what makes it possible, and how pressure affects ice. Subscribe to Earth Lab for more fascinating science videos - http://bit.ly/SubscribeToEarthLab All the best Earth Lab videos http://bit

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    When will Robots Kill Us All? | Earth Lab

    94 views / 0 likes - added

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  • 05:40 When Will We Have Synthetic Food? | Earth Lab

    When Will We Have Synthetic Food? | Earth Lab

    228 views / 0 likes - added

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    How to Survive a Lightning Strike | Earth Lab

    299 views / 0 likes - added

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  • 04:04 How do Stem Cells Actually Work? | Earth Lab

    How do Stem Cells Actually Work? | Earth Lab

    86 views / 0 likes - added

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    Stoichiometry: Chemistry for Massive Creatures - Crash Course Chemistry #6

    298 views / 0 likes - added

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    Is There Proof Aliens Exist? | Earth Lab

    99 views / 0 likes - added

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    Could we live forever? | Earth Lab

    260 views / 0 likes - added

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  • 08:46 Quantum Mechanics - Part 1: Crash Course Physics #43

    Quantum Mechanics - Part 1: Crash Course Physics #43

    257 views / 0 likes - added

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  • 10:24 Homunculus - Crash Course Psychology #6

    Homunculus - Crash Course Psychology #6

    322 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.

  • 03:33 Where Does Gold Come From? | Earth Lab

    Where Does Gold Come From? | Earth Lab

    92 views / 0 likes - added

    Where does gold come from before it makes its way into jewelry? Helen Czerski explores the methods old prospectors used to find gold. Subscribe to Earth Lab for more fascinating science videos - http://bit.ly/SubscribeToEarthLab All the best Earth Lab vid

  • 04:14 Why Is Salt White? | Earth Lab

    Why Is Salt White? | Earth Lab

    94 views / 0 likes - added

    Why does salt look white. This clip from In Search of Science Explains. Subscribe to Earth Lab for more fascinating science videos - http://bit.ly/SubscribeToEarthLab All the best Earth Lab videos http://bit.ly/EarthLabOriginals Best of BBC Earth videos h

  • 10:21 Engines: Crash Course Physics #24

    Engines: Crash Course Physics #24

    232 views / 0 likes - added

    One of the greatest inventions is the steam engine. But why? What makes it so useful? And how does it work? In this episode of Crash Course Physics, Shini talks to us about how engines work, what makes them efficient, and why they're pretty cool. Get your

  • 03:34 What If Earth Only Had One Season?

    What If Earth Only Had One Season?

    53 views / 0 likes - added

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  • 07:10 Could the Northern Lights Signal a Global Catastrophe | Earth Lab

    Could the Northern Lights Signal a Global Catastrophe | Earth Lab

    133 views / 0 likes - added

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  • 09:03 Things to Know About Chimps | BBC Earth

    Things to Know About Chimps | BBC Earth

    164 views / 0 likes - added

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

    Climate Change: Crash Course Kids #41.2

    470 views / 1 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

  • 09:08 Quantum Mechanics - Part 2: Crash Course Physics #44

    Quantum Mechanics - Part 2: Crash Course Physics #44

    216 views / 0 likes - added

    e=mc2... it's a big deal, right? But why? And what about this grumpy cat in a box and probability? In this episode of Crash Course Physics, Shini attempts to explain a little more on the topic of Quantum Mechanics. *** Get your own Crash Course Physics mu

  • 10:14 The Chemical Mind - Crash Course Psychology #3

    The Chemical Mind - Crash Course Psychology #3

    482 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.


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