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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 Playing22minCan AI Help Us Talk to Whales?
- Now Playing16minWhy Is The World Rushing Back To The Moon?
- 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?
It's Okay to Be Smart
- Now Playing7minEl Niño and Why We Can't Predict the Weather
- Now Playing7minCould Bigfoot REALLY Exist?
- Now Playing10minMoney Is A Technological Fiction
- Now Playing4minWhat is Deja Vu?!
- Now Playing5minClaude Monet Was Half Honeybee
- Now Playing6minCan Coral Reefs Survive Climate Change? #OursToLose
- Now Playing6minWhy Are Cicadas So Good At Math?
- Now Playing3minWhy I PBS
- Now Playing4minSpace Sounds
- Now Playing7minThe Real "Doctor Frankenstein"
- Now Playing4minThis is a SUPER BLOOD MOON! Lunar Eclipses Explained
- Now Playing4minWhy I'm Scared of Spiders
- Now Playing6minThe Surprising Reason We Eat Spicy Food
- Now Playing9minCan You Bend Light Like This?
- Now Playing3minWhere Does the Smell of Rain Come From?
- Now Playing5minWhy Does February Have 28 Days?
- Now Playing4minHow Ingenious Animals Have Engineered Air Conditioning
- Now Playing6minHow Habits are Formed
- Now Playing5minHow Much Plastic is in the Ocean?
- Now Playing5minRemembering Carl Sagan
Origin of Everything
- Now Playing10minHow Did Makeup Ads Go From Style to Science?
- Now Playing9minWhy Do We Drink Milk in School?
- Now Playing5minWhat Was Jesus' Real Name?
- Now Playing7minIs Poisoned Halloween Candy a Myth?
- Now Playing9minWhat If Islam Conquered Europe?
- Now Playing11minWhat is Racial Passing?
- Now Playing10minWhy Is There a Minimum Wage?
- Now Playing12minWhy Do Schools Teach Sex Education?
- Now Playing7minThe True Origin of Killer Clowns
- Now Playing9minIs the Rosa Parks Story True?
- Now Playing7minHow Your Rubber Ducky Explains Colonialism
- Now Playing7minIs Poisoned Halloween Candy a Myth?
- Now Playing8minWhy Do Women Shave Their Legs?
- Now Playing8minWhy Do Kids Have Their Own Bedrooms?
- Now Playing11minWhy Do So Many Religions Have Headwear?
- Now Playing10minHow WWII Created Godzilla & Mecha Robots
- Now Playing8minWhy Was Crossdressing Illegal?
- Now Playing8minWhy Do Women Give Birth Lying Down?
- Now Playing8minWhen DId Marriage Become about Love?
- Now Playing7minWhy Do We Say "Asian American" Not "Oriental"?
Two Cents
- Now Playing6minHow Do You Actually Buy A House?
- Now Playing8min5 Ways People Are Dumb About Money
- Now Playing8minAre "Free" Video Games Really Free?
- Now Playing6minShould I Buy Bitcoin?
- Now Playing6minWhat is The Cost of Pet Ownership?
- Now Playing6minShould You Break Up With Your Big Bank?
- Now Playing6minThe Ugly Truth About Airline Miles
- Now Playing4minWhat is the DOW?
- Now Playing6minWhat the Heck Are Mutual Funds?
- Now Playing6minDoes Wealth Make You Meaner?
- Now Playing5minBudgeting Basics
- Now Playing7minIs the Stock Market Just a Big Casino?
- Now Playing8min5 Strange Investor Crazes!
- Now Playing5minHow are credit scores calculated?
- Now Playing5minHow Do Your Tax Dollars Get Spent?
- Now Playing7minIs It Even POSSIBLE to Save for Retirement?
- Now Playing6minDo I Need To Buy A House?
- Now Playing7minLove and Money
- Now Playing5minHow Cars Can Keep You Poor
- Now Playing6minMoving Without Spending a Fortune
Monstrum
- Now Playing11minThe Original Urban Legend: Spring-Heeled Jack
- Now Playing6minRethinking Frankenstein's Monster
- Now Playing6minThe Origin of Medusa
- Now Playing10minWill-o'-the-Wisp: Monstrous Flame or Scientific Phenomenon?
- Now Playing11minBasilisk or Cockatrice? The Mysterious King of Serpents
- Now Playing10minJorōgumo: The Deadly Spider Woman from Yokai Lore
- Now Playing8minNuckelavee: Scotland's Skinless Evil Monstrosity
- Now Playing14minThe Evolution of Creepy Dolls
- Now Playing11minThe Fatal Song of the Sirens
- Now Playing8minCreepy Clowns: The Horror Behind the Laughter
- Now Playing12minWas Púca the Nightmare Bunny That Inspired Donnie Darko?
- Now Playing11minCan All Monsters Be Traced Back to Tiamat?
- Now Playing10minHow Bloody Mary Turns Fear Into Fun
- Now Playing10minIs Yuki-onna the Most Terrifying Snow Monster?
- Now Playing17minModern Zombies: The Rebirth of the Undead
- Now Playing12minThe Origins of 'Big Bug' Science Fiction
- Now Playing13minLeprechaun: From Gold-Loving Cobbler to Cultural Icon
- Now Playing8minWerehyena: The Terrifying Shapeshifters of African Lore
- Now Playing15minBaba Yaga: The Ancient Origins of the Famous 'Witch'
- Now Playing13minWhat Happened During Our Scary Slumber Party
Eons
- Now Playing10minLife, Sex & Death Among the Dire Wolves
- Now Playing5minThat Time Oxygen Almost Killed Everything
- Now Playing11minFrom the Cambrian Explosion to the Great Dying
- Now Playing9minOur Ancient Relative That Said 'No Thanks' To Life On Land
- Now Playing11minDid These Giant Sloths Poop Themselves to Death?
- Now Playing13minAn Illustrated History of Dinosaurs
- Now Playing12minWhen Birds Had Teeth
- Now Playing7minThe Trouble With Trilobites
- Now Playing10minWhen Giant Hypercarnivores Prowled Africa
- Now Playing10minHow Chilis Got Spicy (and Why We Love the Burn)
- Now Playing8minWhat Was The Earliest Surgery?
- Now Playing10minHow Blood Evolved (Many Times)
- Now Playing8minHow the Walrus Got Its Tusks
- Now Playing9minThe Oddest Couple in the Fossil Record
- Now Playing12minYour Place in the Primate Family Tree
- Now Playing10minThe Hidden Genes That Make Us Human
- Now Playing13minDid Raptorex Really Exist?
- Now Playing12minWhen Sharks Swam the Great Plains
- Now Playing11minWhen Giant Lemurs Ruled Madagascar
- Now Playing9minHow Our Deadliest Parasite Turned To The Dark Side
Hot Mess
- Now Playing6minWhat Indigenous Communities Teach Us About Climate Change
- Now Playing5minBeef Is Bad For The Climate. Can We Make It Better?
- Now Playing5minClimate change will push millions out. Where will they go?
- Now Playing6minWhat if Carbon Emissions Stopped Tomorrow?
- Now Playing11minClimate Change is Too Big for our Brains feat. Mike Rugnetta
- Now Playing6minWhat if Carbon Emissions Stopped Tomorrow?
- Now Playing5minWhat's actually the worst greenhouse gas?
- Now Playing5minWhat Can You Actually Do About Climate Change?
- Now Playing5minHow A Sticker Kept 3 Billion Tons of CO2 Out of The Air
- Now Playing5minWe've Ignored Climate Change For More Than a Century
- Now Playing5minWhat the Cutest Animal Can Teach Us About Saving Ourselves
- Now Playing4minWhy Are Hurricanes Getting Stronger?
- Now Playing5minWe've Ignored Climate Change For More Than a Century
- Now Playing5minWhat the Cutest Animal Can Teach Us About Saving Ourselves
- Now Playing5minBeef Is Bad For The Climate. Can We Make It Better?
- Now Playing5minWhy Don't We Hear About the Ozone Hole Anymore?
- Now Playing10minThe Link Between Extreme Weather and Climate Change
- Now Playing5minWhat Can You Actually Do About Climate Change?
- Now Playing5minCan Farms and Forests Coexist?
- Now Playing6minCan We Get Solar Power To Everyone Who Wants It?
Space Time
- Now Playing20minDoes Many Worlds Explain Quantum Probabilities?
- Now Playing5minCould NASA Start the Zombie Apocalypse?
- Now Playing16minGalaxies, part 2: Crash Course Astronomy #39
- Now Playing11minMartian Evolution
- Now Playing12minAnti-Matter and Quantum Relativity
- Now Playing12minThe Real Science of the EHT Black Hole
- Now Playing15minWhat If the Galactic Habitable Zone LIMITS Intelligent Life?
- Now Playing14minAre Virtual Particles A New Layer of Reality?
- Now Playing13minIs Time Travel Impossible?
- Now Playing14minDoes Life Need a Multiverse to Exist?
- Now Playing11minFirst Detection of Life
- Now Playing15minPerpetual Motion From Negative Mass?
- Now Playing10minSelf-Replicating Robots and Galactic Domination
- Now Playing14minWhy String Theory is Right
- Now Playing8minWhat Happens At The Edge Of The Universe?
- Now Playing10minLife on Europa?
- Now Playing9minHow Gaia Changed Astronomy Forever
- Now Playing13minAre We Living in an Ancestor Simulation? ft. Neil deGrasse T
- Now Playing11minWhat Happened Before the Big Bang?
- Now Playing14minThe NEW Warp Drive Possibilities
Beat Making Lab
- Now Playing3minPanama: Meet the Kids Behind the Beats
- Now Playing2minWhat's In the Backpack?
- Now Playing5minBehind the Beat: Portobelo
- Now Playing3minBeat Making Challenge #1: Accordion Trap
- Now Playing10minHeartbeats of Fiji
- Now Playing2minMashup: National Anthems
- Now Playing2minField Trip: Prison Beats
- Now Playing3minGet Your Drums Right
- Now Playing4minCho Cho Cho (Music Video) filmed in Goma, Congo
- Now Playing2minWalshy Fire [of Major Lazer] Wants Your Riddims
- 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 Playing4minDiablos (music video)
- Now Playing3minEpisode 1: Goma, Congo
- Now Playing3min#FijiChallenge w/ Walshy Fire of Major Lazer
- Now Playing3minProf. Angel Sound Prison Beats Interview
- Now Playing3minSampling w/ Flip Flops and Ski Beatz
- Now Playing3minBehind The Beat: First Beat Making Lab (2011)
- Now Playing4minPortobelo (music video)
Infinite Series
- Now Playing16minHow to Break Cryptography
- Now Playing14minBuilding an Infinite Bridge
- Now Playing9minAssociahedra: The Shapes of Multiplication
- Now Playing11minThe Geometry of SET
- Now Playing14minMaking Probability Mathematical
- Now Playing11minWhat are Numbers Made of?
- Now Playing12minProving Pick's Theorem
- Now Playing10minInstant Insanity Puzzle
- Now Playing13minNetwork Mathematics and Rival Factions | Infinite Series
- Now Playing17minSplitting Rent with Triangles
- Now Playing15minDissecting Hypercubes with Pascal's Triangle
- Now Playing11minDefining Infinity
- Now Playing8minTelling Time on a Torus
- Now Playing9minThis Video was Not Encrypted with RSA
- Now Playing13minThe Mathematics of Quantum Computers
- Now Playing12minWhen Pi is Not 3.14
- Now Playing11minWhat was Fermat's "Marvelous" Proof?
- Now Playing9minCan You Solve the Poison Wine Challenge?
- Now Playing8minAre Prime Numbers Made Up?
- Now Playing10minWhat Does It Mean to Be a Number? (The Peano Axioms)
Idea Channel
- Now Playing6minAre Virtual Video Game Economies Becoming Real?
- Now Playing3minSuper Mario Brothers as Surrealist Art?
- Now Playing6minIs Futurama the Best Argument Against Transhumanism?
- Now Playing3minAre Holograms Nostalgia or a New Form of Art?
- Now Playing3minAre Holograms Nostalgia or a New Form of Art?
- Now Playing6minIs Doctor Who a Religion?
- Now Playing9minDoes Math Really Exist?
- Now Playing8minIs Sad Music Actually Sad?
- Now Playing5minAre You a Hipster?
- Now Playing3minIs the Web Browser Replacing the Art Gallery?
- Now Playing8minIs Developing Artificial Intelligence (AI) Ethical?
- Now Playing8minIs Piracy Helping Game of Thrones?
- Now Playing9minIs Community a Postmodern Masterpiece?
- Now Playing4minIs Twitter the Newest Form of Literature?
- Now Playing3minWhat Makes a Pop Star Authentic?
- Now Playing4minThe Bronies Phenomenon
- Now Playing6minWhat do MP3s and Magic Spells Have in Common?
- Now Playing4minHas the Microsoft Kinect revolutionized art?
- Now Playing5minIs Facebook Changing Our Identity?
- Now Playing6minAre MP3s & Vinyl Better than Live Music?