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Space TimeSpace Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth.
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- Now Playing11minThe Hazy Evolution of Cannabis
- Now Playing11minMeasuring the Universe With a 14-Billion Light-Year Ruler
- Now Playing16minHow Eclipses Revealed Our Solar System
- Now Playing10minA Giant Monster With a Giant Problem
- Now Playing10minWhat Will Earth Be Like 300 Million Years From Now?
- Now Playing16minWhat If Gravity is Not A Fundamental Force?
- Now Playing15minDoes Space Emerge From A Holographic Boundary?
- Now Playing8minIs the Southern Accent Disappearing?
- Now Playing15minThis Winter Trend Is Overpowering Global Warming
- Now Playing8minWhat Was The Earliest Surgery?
It's Okay to Be Smart
- Now Playing5minThis Land Is Your Land - Project For Awesome 2016
- Now Playing8minWhy Don't Birds Lay Square Eggs?
- Now Playing5minDo Fish Pee?
- Now Playing8minWhen Science Fiction Becomes Science Fact
- Now Playing5minNature's Living Fireworks
- Now Playing10minThe Mystery of the World's Greatest Butterfly Migration
- Now Playing2minCarbon and Oxygen and You: Explained
- Now Playing9minWhy Do We Get Dizzy (...and Astronauts Don't?)
- Now Playing7minWill You Still Eat Raw Fish After Watching This Video?
- Now Playing6minCould We Clone Ourselves?
- Now Playing7minHow Do Glaciars Move?
- Now Playing3minHow Do Squirrels Find Their Nuts?
- Now Playing8min6 Chemical Reactions That Changed History
- Now Playing6minCould We Clone Ourselves?
- Now Playing9minCan We Get Older Without Aging?
- Now Playing6minIlluminating the Universe: The History of Light
- Now Playing7minEl Niño and Why We Can't Predict the Weather
- Now Playing3minWhat Color is the Universe?
- Now Playing6minDefusing the Population Bomb
- Now Playing7minWhy Are We The Only Humans Left?
Origin of Everything
- Now Playing10minHow Did Makeup Ads Go From Style to Science?
- Now Playing9minWhy Do We Drink Milk in School?
- Now Playing11minWhat is Racial Passing?
- Now Playing10minWhy Is There a Minimum Wage?
- Now Playing9minWhat If Islam Conquered Europe?
- Now Playing7minIs Poisoned Halloween Candy a Myth?
- Now Playing5minWhat Was Jesus' Real Name?
- Now Playing7minHow Your Rubber Ducky Explains Colonialism
- Now Playing9minIs the Rosa Parks Story True?
- Now Playing12minWhy Do Schools Teach Sex Education?
- Now Playing7minThe True Origin of Killer Clowns
- Now Playing8minWhy Do Kids Have Their Own Bedrooms?
- Now Playing8minWhy Do Women Shave Their Legs?
- Now Playing7minIs Poisoned Halloween Candy a Myth?
- Now Playing10minHow WWII Created Godzilla & Mecha Robots
- Now Playing11minWhy Do So Many Religions Have Headwear?
- Now Playing7minWhy Do We Say "Asian American" Not "Oriental"?
- Now Playing8minWhen DId Marriage Become about Love?
- Now Playing8minWhy Was Crossdressing Illegal?
- Now Playing8minWhy Do Women Give Birth Lying Down?
Two Cents
- Now Playing7minIs the Stock Market Just a Big Casino?
- Now Playing5minBudgeting Basics
- Now Playing6minWhat the Heck Are Mutual Funds?
- Now Playing6minDoes Wealth Make You Meaner?
- Now Playing4minWhat is the DOW?
- Now Playing6minThe Ugly Truth About Airline Miles
- Now Playing6minShould You Break Up With Your Big Bank?
- Now Playing6minWhat is The Cost of Pet Ownership?
- Now Playing6minShould I Buy Bitcoin?
- Now Playing8minAre "Free" Video Games Really Free?
- Now Playing8min5 Ways People Are Dumb About Money
- Now Playing6minHow Do You Actually Buy A House?
- Now Playing6minHacking Your Brain to Get Out Of Debt
- Now Playing6minWhat Are The Most Lucrative Trades?
- Now Playing7minCan You Really Retire in Your 30s?
- Now Playing6minWomen Financial Superpowers
- Now Playing6minMoving Without Spending a Fortune
- Now Playing5minHow Cars Can Keep You Poor
- Now Playing7minLove and Money
- Now Playing6minDo I Need To Buy A House?
Monstrum
- Now Playing12minWas Púca the Nightmare Bunny That Inspired Donnie Darko?
- Now Playing8minCreepy Clowns: The Horror Behind the Laughter
- Now Playing11minThe Fatal Song of the Sirens
- Now Playing14minThe Evolution of Creepy Dolls
- Now Playing8minNuckelavee: Scotland's Skinless Evil Monstrosity
- Now Playing11minBasilisk or Cockatrice? The Mysterious King of Serpents
- Now Playing10minJorōgumo: The Deadly Spider Woman from Yokai Lore
- Now Playing10minWill-o'-the-Wisp: Monstrous Flame or Scientific Phenomenon?
- Now Playing6minThe Origin of Medusa
- Now Playing6minRethinking Frankenstein's Monster
- Now Playing11minThe Original Urban Legend: Spring-Heeled Jack
- Now Playing10minThe Enchanting Fairies of Celtic Lore
- Now Playing10minPontianak: The Vampiric Ghost of Southeast Asia
- Now Playing10minYara-ma-yha-who: Australia's Regurgitating, Blood-Sucking Mo
- Now Playing13minThe SCP Foundation: Declassified
- Now Playing15minBaba Yaga: The Ancient Origins of the Famous 'Witch'
- Now Playing8minWerehyena: The Terrifying Shapeshifters of African Lore
- Now Playing12minDeath Worms: Fact or Fiction?
- Now Playing13minWhat Happened During Our Scary Slumber Party
- Now Playing13minLeprechaun: From Gold-Loving Cobbler to Cultural Icon
Eons
- Now Playing11minWhen We First Walked
- Now Playing12minThe Island of Huge Hamsters and Giant Owls
- Now Playing12minWhen Mammals Only Went Out At Night
- Now Playing9minThe Evolution of the Heart (A Love Story)
- Now Playing10minThe Last Time the Globe Warmed
- Now Playing12minWhat Was the Ancestor of Everything?
- Now Playing10minHow Horses Took Over North America (Twice)
- Now Playing6minThe Story of Saberteeth
- Now Playing6minHow Did Dinosaurs Get So Huge?
- Now Playing9minHow Vertebrates Got Teeth... And Lost Them Again
- Now Playing8minHow We Domesticated Cats (Twice)
- Now Playing8minHow Dinosaurs Coupled Up
- Now Playing9minThe First and Last North American Primates
- Now Playing9minWhen Insects First Flew
- Now Playing9minThe Fuzzy Origins of the Giant Panda
- Now Playing4minThe Strange Case of the Buzzsaw Jaws
- Now Playing8minThese Fossils Were Supposed To Be Impossible
- Now Playing10minWhen Rodents Rafted Across the Ocean
- Now Playing6minHow Sex Became A Thing
- Now Playing9minWhat a Dinosaur Looks Like Under a Microscope
Hot Mess
- Now Playing6minCan We Get Solar Power To Everyone Who Wants It?
- Now Playing6minWhat If We Burned All The World's Fossil Fuels?
- Now Playing6minWill Big Oil Have To Pay Up Like Big Tobacco?
- Now Playing5minWho Should Pay To Fix Climate Change?
- Now Playing5minClimate change will push millions out. Where will they go?
- Now Playing6minHow To Suck Carbon Dioxide Out of the Sky
- Now Playing5minWho Should Pay To Fix Climate Change?
- Now Playing5minWhy Don't We Hear About the Ozone Hole Anymore?
- Now Playing7minHow To Make Clothes Less Terrible for the Planet
- Now Playing6minWhat If We Burned All The World's Fossil Fuels?
- Now Playing10minFeeling Guilty About Climate Change feat. Hank Green
- Now Playing7minWhat's The Best Car For The Climate?
- Now Playing6minHow To Suck Carbon Dioxide Out of the Sky
- Now Playing6minWhat Indigenous Communities Teach Us About Climate Change
- Now Playing10minFeeling Guilty About Climate Change feat. Hank Green
- Now Playing10minAre You Scared Enough? feat. David Wallace-Wells
- Now Playing5minWhy Climate Change is Unjust
- Now Playing5minWhy We Confuse Weather and Climate
- Now Playing5minWhy Climate Change is Unjust
- Now Playing6minCoral Reefs Are Dying. But They Don't Have To.
Space Time
- Now Playing11minNo Dark Matter = Proof of Dark Matter?
- Now Playing12minWhat's On The Other Side Of A Black Hole?
- Now Playing13minHow Will the Universe End?
- Now Playing14minWhat If Physics IS Not Describing Reality?
- Now Playing10minS2: The Strange Universe of Gravitational Lensing
- Now Playing8minAbsolute Cold
- Now Playing11minSupervoids vs Colliding Universes!
- Now Playing14minGamma-Ray Bursts: Crash Course Astronomy #40
- Now Playing12minReversing Entropy with Maxwell's Demon
- Now Playing3minThe Leap Second Explained
- Now Playing10minThe Death of the Sun
- Now Playing14minSecrets of the Cosmic Microwave Background
- Now Playing14min'Oumuamua Is Not Aliens
- Now Playing14minOur Antimatter, Mirrored, Time-Reversed Universe
- Now Playing11minSuperluminal Time Travel + Time Warp Challenge Answer
- Now Playing9minGeneral Relativity & Curved Spacetime Explained!
- Now Playing13minSound Waves from the Beginning of Time
- Now Playing11minStar Clusters: Crash Course Astronomy #35
- Now Playing10minLife on Europa?
- Now Playing11minWe Are Star Stuff
Beat Making Lab
- Now Playing2minField Trip: Prison Beats
- Now Playing3minGet Your Drums Right
- Now Playing10minHeartbeats of Fiji
- Now Playing2minMashup: National Anthems
- Now Playing5minBehind the Beat: Portobelo
- Now Playing2minWhat's In the Backpack?
- Now Playing3minBeat Making Challenge #1: Accordion Trap
- Now Playing3minPanama: Meet the Kids Behind the Beats
- Now Playing2minWalshy Fire [of Major Lazer] Wants Your Riddims
- Now Playing4minCho Cho Cho (Music Video) filmed in Goma, Congo
- Now Playing3minProf. Angel Sound Prison Beats Interview
- Now Playing3min#FijiChallenge w/ Walshy Fire of Major Lazer
- Now Playing4minDiablos (music video)
- Now Playing3minEpisode 1: Goma, Congo
- Now Playing3minFemale Hip Hop Crew Makes Beats in Senegal
- Now Playing3minBeat Making Challenge #2: Kora Riddim
- Now Playing3minExclusive Zenga (Music Video) by Flamme Kapaya
- Now Playing2minHealth Worker Beat
- Now Playing4minTrapped In Paradise
- Now Playing3minBehind The Beat: First Beat Making Lab (2011)
Infinite Series
- Now Playing15minArrow's Impossibility Theorem
- Now Playing9minA Hierarchy of Infinities
- Now Playing8minHow to Divide by "Zero"
- Now Playing9minHow Many Humans Have the Same Number of Body Hairs?
- Now Playing10minUnraveling DNA with Rational Tangles
- Now Playing14minTopology Riddles | Infinite Series
- Now Playing12minThe Honeycombs of 4-Dimensional Bees ft. Joe Hanson
- Now Playing9minHow Many Humans Have the Same Number of Body Hairs?
- Now Playing10minThe Assassin Puzzle
- Now Playing11minVoting Systems and the Condorcet Paradox
- Now Playing14minInfinite Chess
- Now Playing15minDissecting Hypercubes with Pascal's Triangle
- Now Playing9minBeyond the Golden Ratio
- Now Playing11minSingularities Explained
- Now Playing11minSingularities Explained
- Now Playing12minThe Honeycombs of 4-Dimensional Bees ft. Joe Hanson
- Now Playing10minThe Assassin Puzzle
- Now Playing17minSplitting Rent with Triangles
- Now Playing14minWhy Computers are Bad at Algebra
- Now Playing16minHow to Break Cryptography
Idea Channel
- Now Playing5minIs William Gibson A Modern Day Oracle?
- Now Playing4minAre Mashups the End of Music Genres?
- Now Playing4minAre LOLCats and Internet Memes Art?
- Now Playing4minRussian Meteorites and Surveillance Culture
- Now Playing5minAre Olympic Competitors Geniuses?
- Now Playing7minHow are Justin Bieber, Franz Liszt and Jerusalem Connected?
- Now Playing5minAre Memes and Internet Culture Creating a Singularity?
- Now Playing6minIs Minecraft the Ultimate Educational Tool?
- Now Playing5minIs William Gibson A Modern Day Oracle?
- Now Playing8minIs a Tagged Instagram More Than Just a Photo?
- Now Playing5minNicolas Cage, Taoism, and YOLO
- Now Playing9minWill Kickstarter Replace Hollywood?
- Now Playing4minFrom Sherlock Holmes to 50 Shades of Grey
- Now Playing3minIs the Web Browser Replacing the Art Gallery?
- Now Playing4minHas the Microsoft Kinect revolutionized art?
- Now Playing4minIs Twitter the Newest Form of Literature?
- Now Playing5minHow will the Animated GIF affect the Presidential Election?
- Now Playing9minIs the Universe a Computer?
- Now Playing5minAre Olympic Competitors Geniuses?
- Now Playing5minIs CSS and Website Design a Fashion Statement?