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Oops I Changed the WorldPavlov's investigations into dog digestion lead to phone addiction; a failed quest to find a safer refrigerant creates Teflon; a damaged delivery crate is instrumental in the invention of dynamite.

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Oops I Changed the WorldPavlov's investigations into dog digestion lead to phone addiction; a failed quest to find a safer refrigerant creates Teflon; a damaged delivery crate is instrumental in the invention of dynamite.0Oops I Changed the WorldThe failed experiment and the world's greatest crime-fighting tool; a clumsily dressed cut leads to the invention of plastics; how chance conversation and sausage poison changed the face of Hollywood.

4th and Forever

• Now Playing21minWelcome to Long Beach, Baby
• Now Playing21minGo Hard or Go Home
• Now Playing21minReality Check
• Now Playing21minDefend Our Territory
• Now Playing21minThey're Rich and We're Not
• Now Playing21minLive for the Moment
• Now Playing21minWe Better Battle
• Now Playing21minBack on Track
• Now Playing21minWe're Not Finished, Yet
• Now Playing21minThere's No Tomorrow

4th and Forever: Alcoa

• Now Playing35minAgainst all Odds
• Now Playing30minDefending the Legacy
• Now Playing31minThe Battle of Pistol Creek, Part 1
• Now Playing28minThe Battle of Pistol Creek, Part 2
• Now Playing29minCleaning the Wounds
• Now Playing32minThe Push Begins
• Now Playing33minHome Stretch
• Now Playing34minNever a Doubt

4th and Forever: DeSoto

• Now Playing42minGrowing Pains
• Now Playing42minRestless & Young
• Now Playing42minDuncanville or Doom
• Now Playing42minHomecoming
• Now Playing42minThe Hill
• Now Playing42minLong Time Coming
• Now Playing42minWin or Go Home
• Now Playing42minWhat We Must Do

4th and Forever: Muck City

• Now Playing37minThe Stage Is Set
• Now Playing38minA Rocky Start
• Now Playing34minTensions Mount
• Now Playing35minA Muck Homecoming
• Now Playing33minRabbit Hunt
• Now Playing31minDevastating Blow
• Now Playing30minMuck Bowl Madness
• Now Playing27minThere Can Be Only One

A Curious World

• Now Playing7minBeyond Gravity
• Now Playing9minBlack Holes
• Now Playing8minAncient Builders
• Now Playing6minLive Long & Prosper
• Now Playing7minUnderwater Worlds
• Now Playing9minThe Universe
• Now Playing8minWeather
• Now Playing7minFirst Life On Earth
• Now Playing6minSuper-Volcanoes
• Now Playing8minChanging Earth
• Now Playing6minWhy Do We Dream?
• Now Playing8minTraits
• Now Playing9minExtraterrestrials
• Now Playing8minTime Tellers
• Now Playing7minHuman Migration
• Now Playing9minCan We Colonize Mars?
• Now Playing9minCould Robots Rule The World?
• Now Playing9minNanomedicine Revolution
• Now Playing10minCreativity Or Madness
• Now Playing11minSupreme Human Machine

Adolf Galland Legacy

• Now Playing37minAdolf Galland Legacy: Part One: Ace Of The Luftwaffe
• Now Playing40minAdolf Galland Legacy: Part Two: The Fighter General
• Now Playing47minAdolf Galland Legacy: Part Three: Clash Of Legends

Age Of Big Cats

• Now Playing52minOrigins
• Now Playing52minWorld Domination
• Now Playing52minSurvivors

Amazing Dinoworld

• Now Playing49minThe Feather Revolution
• Now Playing49minThe World of Sea Monsters

American Icons

• Now Playing13minAbe Lincoln
• Now Playing13minBabe Ruth
• Now Playing14minFDR
• Now Playing14minTom Edison
• Now Playing12minMark Twain
• Now Playing11minThomas Jefferson
• Now Playing13minGeorge Washington
• Now Playing14minEleanor Roosevelt
• Now Playing11minWalt Disney

Ancient Earth

• Now Playing14minThe Permian
• Now Playing11minThe Triassic
• Now Playing15minThe Cretaceous

Ancient Earth: Dinosaurs of the Frozen Continent

• Now Playing51minTo the Ends of the Earth
• Now Playing51minWhat Lies Beneath

Ancient Engineering

• Now Playing50minRoads That Changed the World
• Now Playing50minThe Great Wall of China
• Now Playing50minSecrets of the Pyramids
• Now Playing50minRise of the Super-Castle
• Now Playing50minSecrets of Notre Dame
• Now Playing50minSecrets Of Angkor Wat
• Now Playing50minThe Power Of Water
• Now Playing50minHistory's Greatest Ships
• Now Playing50minStone Age Secrets
• Now Playing50minThe Taj Mahal And The Golden Age Of Islam
• Now Playing51minEarliest Arenas: The Colosseum
• Now Playing51minHow Gold Changed The World
• Now Playing51minHistory's Deadliest Weapons
• Now Playing51minNavigating The Globe
• Now Playing51minTools & Tech
• Now Playing51minAnatomy Of The House
• Now Playing51minExtreme Buildings
• Now Playing51minHistory's Hidden Marvels
• Now Playing51minAncient Waterways
• Now Playing51minBuilding Bridges

Ancient Yellowstone

• Now Playing15minAlien Life
• Now Playing14minFrozen Archeology
• Now Playing14minThe Petrified Forest
• Now Playing14minMammoth Country
• Now Playing22minThe Last Triceratops
• Now Playing17minPast and Future Yellowstone

Art Ninja, Part 1

• Now Playing29minDay Of The Birdman
• Now Playing29minDay Of The Disguise
• Now Playing29minDay Of The Goblins
• Now Playing29minDay Of The Lucky Trunks
• Now Playing29minDay Of The Angry Cloud
• Now Playing28minDay Of The Decoration
• Now Playing29minDay Of The Trash
• Now Playing29minDay Of The Aliens
• Now Playing29minDay Of The Bug
• Now Playing29minDay Of The Dog
• Now Playing29minDay Of The Prank
• Now Playing29minDay Of The Game
• Now Playing29minDay Of The Spider
• Now Playing29minDay Of The Diamond
• Now Playing29minDay Of The Time Machine
• Now Playing29minDay Of The Dragon
• Now Playing29minDay Of The Baby
• Now Playing29minDay Of The Band
• Now Playing28minDay Of The Werewolf
• Now Playing28minDay Of The Six Pack
• Now Playing29minDay Of The Animals
• Now Playing29minDay Of The Match
• Now Playing29minDay Of The Egg
• Now Playing29minDay Of The Yeti
• Now Playing29minDay Of The Dream

Art Ninja, Part 2

• Now Playing21minDay Of The Prophecy
• Now Playing21minDay Of The Magician
• Now Playing21minDay Of The Ghost
• Now Playing21minDay Of The Zapper
• Now Playing21minDay Of The Flashback

Awesome Adventure

• Now Playing21minNew Zealand
• Now Playing21minMaui
• Now Playing21minPacific North West
• Now Playing21minPoconos
• Now Playing21minAustralia
• Now Playing21minSan Diego
• Now Playing21minPittsburgh
• Now Playing20minCancun
• Now Playing20minPanama
• Now Playing21minHawaii
• Now Playing20minThailand
• Now Playing20minCuracao
• Now Playing20minIceland
• Now Playing20minMarco Island
• Now Playing20minSan Francisco
• Now Playing20minColorado
• Now Playing20minPhiladelphia
• Now Playing20minUtah
• Now Playing20minCroatia
• Now Playing20minQuebec
• Now Playing20minNew Orleans
• Now Playing20minPittsburgh
• Now Playing20minSouthern California

Becoming Xtraordinary presented by Bear Grylls

• Now Playing23minThe G.O.A.T (Roger Federer) And The Racer (Danica Patrick)
• Now Playing23minThe Star (Julia Roberts) And The Fighter (Wladimir Klitschko)
• Now Playing23minThe Keeper (Maddie Hinch) And The Explorer (Ranulph Fiennes)
• Now Playing23minThe Survivor (Bear Grylls) And The Boss (Ursula Burns)
• Now Playing24minThe Inventor (Robert Langer) And The Rebel (Frances Arnold)
• Now Playing23minThe Friend (Courteney Cox) And The Showman (Channing Tatum)
• Now Playing25minThe Magician (Steven Frayne) And The Captain (Kate Richardson-Walsh)
• Now Playing23minThe President (F.W. De Klerk) And The Pioneer (Valerie Amos)
• Now Playing24minThe Golden Girl (Kelly Holmes) And The Spaceman (Tim Peake)
• Now Playing26minThe Firefighter (Sabrina Cohen-Hatton) And The Bionic Man (Mark Ormrod)

Besieged Fortresses, Battles Of Legend

• Now Playing51minAcre: Clash of the Titans
• Now Playing50minConstantinople: The Emperor's Last Stand
• Now Playing50minRhodes: The Ultimate Battle
• Now Playing50minThe Great Siege of Malta

Beyond The Spotlight

• Now Playing51minKristen Bell
• Now Playing52minSamuel L. Jackson & Latanya Richardson Jackson
• Now Playing52minLeVar Burton
• Now Playing52minMrBeast
• Now Playing52minJoe Namath

Big Picture Earth: Natural Sound

• Now Playing31minCumberland Island
• Now Playing31minStonehenge
• Now Playing31minNabataean Lost Kingdom Of Petra
• Now Playing31minColorado Canyons Of Time
• Now Playing31minFountains Abbey
• Now Playing31minThe Oracle At Delphi
• Now Playing31minCanyons Of The Ancient Ones
• Now Playing31minThe Young Earth Of The Reykjanes Peninsula
• Now Playing31minCentral Park, New York
• Now Playing31minIceland Glacier Lagoon
• Now Playing31minSlot Canyons Of Utah
• Now Playing31minKatahdin Woods And Water
• Now Playing30minMoods Of Venice
• Now Playing31minThe Acropolis Of Athens
• Now Playing31minDesert Of Wadi Rum
• Now Playing31minOkefenokee Blackwater Swamp
• Now Playing31minShooter's Island Of New York City
• Now Playing31minThe Terminal Basin Of Mono Lake
• Now Playing31minGreatest Hits
• Now Playing31minAlewives Eternal Return

Blindspots

• Now Playing27minLos Angeles
• Now Playing25minSeattle / Vancouver
• Now Playing26minNew York City
• Now Playing24minLondon
• Now Playing25minUnited Kingdom
• Now Playing26minTexas
• Now Playing25minGermany
• Now Playing25minSwitzerland
• Now Playing25minTokyo
• Now Playing25minOsaka / Kyoto

Bright Now, Part 1

• Now Playing12minParasite Planet
• Now Playing22minMystery Signal from Space
• Now Playing9minHacking our Microbiome
• Now Playing18minAfrican Animal Rescue
• Now Playing17minSearch for Japan's Lost Supersub
• Now Playing21minHunt for the U-576
• Now Playing9minSkinny Genes
• Now Playing9minSaving Venice
• Now Playing11minMessage From Space?
• Now Playing22minBlockchain Revolution
• Now Playing12minThe Wright Brothers: Bravery
• Now Playing10minNew Firefighting Tech
• Now Playing13minOctopus Encounters
• Now Playing10minSuper Sea Slugs
• Now Playing11minRebirth of an Underwater Forest
• Now Playing11minPredicting A Pro
• Now Playing12minSaving Tokyo
• Now Playing14minFirst In The Sky
• Now Playing12minThe Race to Forecast Weather
• Now Playing10minBay of Crocs
• Now Playing13minThe Mystery of U-455
• Now Playing11minMonkey Island
• Now Playing13minNight At The Aquarium
• Now Playing10minWolves and Tanks
• Now Playing13minIberian Lynx: Saving the World's Most Endangered Cat

Bright Now, Part 2

• Now Playing14minKetamine: From Street Drug to Lifesaver
• Now Playing13minTiny House: Living Off the Grid
• Now Playing11minRaising A Genius
• Now Playing12minCan You Learn to Be Funny?
• Now Playing11minCoffee Buzz
• Now Playing10minChungungo: The World's Smallest Otter
• Now Playing12minWomen with ADHD
• Now Playing15minVeggie Power
• Now Playing16minPompeii: Behind the Scenes
• Now Playing15minGrowing up Hadza
• Now Playing13minEvolution of Flavor
• Now Playing14minMother Of The Everglades
• Now Playing13minCatching Florida's Apex Predator
• Now Playing13minThe Sweet & Sour Of Florida Sugar
• Now Playing14minFlorida's Garden of Eden
• Now Playing12minFrom The Frontlines Of Covid19
• Now Playing12minAmerica's Wildest Cat & Dog Rivalry
• Now Playing12minThe Birth Of Mar-a-Lago
• Now Playing12minPreparing for Hurricanes
• Now Playing15minThe Road To Florida
• Now Playing12minThe Shark Whisperer

Butterfly Effect

• Now Playing25minAlexander The Great
• Now Playing25minRace To The Moon
• Now Playing25minA Bus For Martin Luther King
• Now Playing25minKing Philippe Of France And Richard The Lionheart Of England
• Now Playing25minConfucius And Chinese Thought
• Now Playing25minGenghis Khan: The Empire Of The Steppes
• Now Playing25minDarwin Discovers The World
• Now Playing25minChernobyl: A Reactor Out Of Control
• Now Playing25minSekigahara: The Battle Of The Samurais
• Now Playing25minEinstein And The Manhattan Project
• Now Playing25minRome Vs. Barbarians
• Now Playing25minInternet: The Origins Of The Web
• Now Playing25minThe Birth Of Rock
• Now Playing27minAl Capone: Child Of Prohibition
• Now Playing27minThe Suffragettes: Battle For The Ballot Box
• Now Playing27minThe Gold Rush: For A Fistful Of Nuggets
• Now Playing27minCortés At The Heart Of The Aztec Empire
• Now Playing27minCuba: Nuclear Standoff
• Now Playing27minBlack Death: The Invisible Enemy
• Now Playing27minIstanbul: From One Empire To The Other
• Now Playing27minAral: A Sea For Cotton
• Now Playing27minThe Fall Of Quebec: France Loses America
• Now Playing27minThe Fronde: An Overthrow Of The Power
• Now Playing27minThe Olympic Games: A Mirror To Society
• Now Playing27minGutenberg: A Visionary Inventor

Casey's Wild Backyard

• Now Playing6minGrizzly
• Now Playing7minBison
• Now Playing6minMountain Lion
• Now Playing6minSnakes

Celts: The Untold Story

• Now Playing51minDawn Of The Celts
• Now Playing51minThe Art And War
• Now Playing49minSkyfall

Changing Ocean Asia

• Now Playing25minSinking Cities
• Now Playing28minExtreme Weather. Powerful Tsunamis.
• Now Playing25minUrban Oceans. Super Corals.
• Now Playing29minSea Level Rise and Engineering Solutions

Classic Cars

• Now Playing11minPierce Arrow
• Now Playing13minDuesenberg
• Now Playing9minTerraplane
• Now Playing12minOldsmobile
• Now Playing11minMustang

Curiosity Retreats Lectures

• Now Playing1hr 2minThe Future of the Mind
• Now Playing57minThe Future of the Internet
• Now Playing52minFrontiers Of Science
• Now Playing59minThe Future of Nanotechnology
• Now Playing45minScience of Happiness
• Now Playing49minA Universe of Big Numbers
• Now Playing57minDiscovery in Cosmology & Particle Physics
• Now Playing24minSuper Brain
• Now Playing59minThe Creative Brain
• Now Playing57minDigital Transcendence
• Now Playing1hr 3minWonders Of The Ocean
• Now Playing1hr 3minThe Art Of Discovery
• Now Playing1hr 5minThe Human Face Of Big Data
• Now Playing1hr 1minThe Future Of The Brain
• Now Playing51minOur Virtual Reality
• Now Playing1hr 1minTo Pluto And Beyond
• Now Playing1hr 1minOur Mathematical Universe
• Now Playing1hr 1minThe Human Journey: A Genetic Odyssey
• Now Playing60minLessons From The Presidents: Balancing Work, Love And Play
• Now Playing59minThe Big Picture

Curious Minds: Deepak Chopra

• Now Playing30minPerfect Being, God & Consciousness
• Now Playing28minImplications Of Astrobiology: Understanding Our Unseen Reality
• Now Playing30minCosmic Jazz & Quantum Consciousness
• Now Playing28minBiofield Science & The Future Of Healing
• Now Playing33minEssential Conundrums: What Is & What Matters
• Now Playing39minIs There A Connection Between Quantum Mechanics And Consciousness?
• Now Playing29minRevisiting Evolution Of Species
• Now Playing31minCreative Cosmos
• Now Playing32minThe Knobe Effect: The World As We Are
• Now Playing43minA Beautiful Question, Part 1
• Now Playing38minA Beautiful Question, Part 2
• Now Playing34minThe Non Local Universe
• Now Playing33minUnderstanding Our Unseen Reality
• Now Playing34minNon-Dual Reality
• Now Playing31minConsciousness Is The Way The Universe Turns Nothing Into Something
• Now Playing33minThe Super Human Mind
• Now Playing26minIs Mind/Body Medicine Becoming Mainstream?
• Now Playing29minIranian Woman - Space Hero
• Now Playing32minThe Mind Body Code
• Now Playing39minThe Garden Of Truth: The Vision And Promise Of Sufism, Islam's Mystical Tradition
• Now Playing27minHow We Create Our Reality
• Now Playing32minWhat Your Thoughts Cannot Tell You
• Now Playing35minCosmic Evolution: Current Understanding Of The Universe
• Now Playing35minGod That Could Be Real
• Now Playing33minSolution To The Hard Problem Of Consciousness

Deep Time History

• Now Playing51minThe Rise Of Civilization
• Now Playing51minThe Age Of Discovery
• Now Playing51minThe Industrial Revolution And Modern Warfare

Destination: Mars

• Now Playing17minPart 1: The Mission
• Now Playing19minPart 2: The Astronauts
• Now Playing17minPart 3: The Journey
• Now Playing12minPart 4: Surviving On Mars
• Now Playing15minPart 5: Why One Way?

Destination: Moon

• Now Playing15minChapter 1: A Matter Of Gravity
• Now Playing9minChapter 2: Water - The Big Question
• Now Playing14minChapter 3: From Outpost To Colony
• Now Playing11minChapter 4: Surviving....And Thriving?
• Now Playing11minChapter 5: Mars Direct Or Moon First?

Destination: Pluto

• Now Playing8minPart 1: Close Encounters Of The Plutonian Kind
• Now Playing7minPart 2: Pluto Or Bust
• Now Playing12minPart 3: Into The Kuiper Belt
• Now Playing9minPart 4: The Mapmaker's Dream
• Now Playing11minPart 5: Looking Back, Looking Forward
• Now Playing18minPart 7: Behind The Scenes With Alan Stern
• Now Playing10minPart 6: The Shoals Of Pluto
• Now Playing4minPart 9: The Pluto Flyby
• Now Playing5minPart 8: The "Giant Heart" On Pluto
• Now Playing4minPart 10: New Horizons Calls Home
• Now Playing8minPart 11: New Horizons - Pluto Flyby Images
• Now Playing8minPart 12: The Surface of Pluto
• Now Playing12minPart 13: The Right Stuff

Digits

• Now Playing53minConnecting To The Future
• Now Playing55minMan Vs. Machine
• Now Playing53minGuardians Of The Web

Doug To The Rescue

• Now Playing30minThe Dogs of Hurricane Dorian
• Now Playing29minLost Dogs of Louisiana
• Now Playing31min13 Days After Hurricane Laura
• Now Playing31minOregon Fire Cats
• Now Playing30minPuerto Rico Rescue Pups
• Now Playing31minChasing Ghost
• Now Playing24minIsland Dogs
• Now Playing26minUrban Hyenas
• Now Playing26minBats Of Malawi
• Now Playing25minDixie Fire Foxes
• Now Playing23minTornado Town

Dynamic Genomes

• Now Playing50minHidden Treasures In Our DNA
• Now Playing50minThe DNA Switch

Eat Like

• Now Playing21minCatherine the Great
• Now Playing19minA Wolf
• Now Playing21minA Viking

Eat Me (Or Try Not To)

• Now Playing50minThe Takeover
• Now Playing50minThe Taste
• Now Playing50minThe Marketing
• Now Playing50minThe Supply Chain
• Now Playing50minThe Impact
• Now Playing50minThe Future

Eclipse Across America

• Now Playing32minCoast To Coast: Part 1
• Now Playing33minCoast To Coast: Part 2
• Now Playing15minEclipse Planet
• Now Playing25minWitnessing The Eclipse

Ecuador: On The Wild Side

• Now Playing53minFrom The Amazon To The Andean Peaks
• Now Playing53minFrom The Andes To The Galapagos Islands

Engineering the Future

• Now Playing54minWind
• Now Playing59minAviation
• Now Playing57minFusion
• Now Playing57minTidal
• Now Playing52minMaritime
• Now Playing54minSolar
• Now Playing53minElectric Vehicles
• Now Playing52minThe Metaverse
• Now Playing52minHyperloop
• Now Playing52minThe Race To Space
• Now Playing52minPerpetual Power
• Now Playing53minTimber Skyscraper

Evolve

• Now Playing53minExplore
• Now Playing54minSurvive
• Now Playing53minCure
• Now Playing54minProtect
• Now Playing53minMove
• Now Playing53minRestore

FASTER!

• Now Playing50minThe Elevator
• Now Playing51minThe Highway
• Now Playing50minThe Shopping Mall
• Now Playing50minThe Plastic Container
• Now Playing50minThe Microwave
• Now Playing50minThe Disposable Cup
• Now Playing50minThe Bar Code
• Now Playing50minThe Dishwasher

Future Cities Asia

• Now Playing14minDesigning
• Now Playing13minConstructing
• Now Playing15minRegenerating
• Now Playing15minResilience

Gaming Show: In My Parents' Garage

• Now Playing23minURL Not Earl
• Now Playing23minCode Yellow
• Now Playing23minThe Gimmick
• Now Playing23minDIY
• Now Playing23minMy Uncle's Car
• Now Playing23minThe Troll
• Now Playing22minAll Night Long!
• Now Playing23minThe Intern
• Now Playing23minBack In Time
• Now Playing23minCry Wolf
• Now Playing23minThe Power Up 1000
• Now Playing23minWe Have A Llama
• Now Playing23minGlitch
• Now Playing22minCrowdfunding
• Now Playing23minCompany Man
• Now Playing22minExtreme
• Now Playing23min"Pong" The Movie!
• Now Playing23minGarage Sale
• Now Playing23minWagony Redux: Electric Boogaloo
• Now Playing23minShaqowe'en
• Now Playing23minDemar
• Now Playing23minHall Of Fame
• Now Playing22minTournie
• Now Playing23minRock & Roll
• Now Playing22minSponsorship

Giants

• Now Playing53minAnacondas
• Now Playing53minElephants
• Now Playing53minCrocodiles
• Now Playing53minSharks
• Now Playing53minLions

Growing Up

• Now Playing20minShark Hunter
• Now Playing20minSky Dive
• Now Playing20minDeer Hunter
• Now Playing20minGobi Desert
• Now Playing20minSky Climb
• Now Playing20minBull Jump
• Now Playing20minSalt Journey
• Now Playing20minLife Choice
• Now Playing20minWasp Fighters
• Now Playing20minReindeer Chase
• Now Playing20minBee Attack

Gym Stars, Part 1

• Now Playing22minGoing For Gold
• Now Playing22minBouncing Back
• Now Playing22minStarting Over
• Now Playing22minFear Of Falling
• Now Playing22minLife Changes
• Now Playing22minBreaking Free
• Now Playing22minA Star Is Born
• Now Playing22minThe Last Dance
• Now Playing22minTrying Out
• Now Playing22minHeart Of A Lion
• Now Playing22minSo Close
• Now Playing22minThe Next Level
• Now Playing22minWe Can Be Heroes
• Now Playing22minProving It
• Now Playing23minMaking The Grade
• Now Playing22minStepping Up
• Now Playing23minBest In Britain
• Now Playing22minFuture Champions
• Now Playing23minBelieve In Yourself
• Now Playing21minBring It On
• Now Playing23minA Test Of Friendship
• Now Playing23minDove's Last Chance
• Now Playing23minTouching A Cloud
• Now Playing23minEverything To Lose
• Now Playing23minFighting To The Finish

Gym Stars, Part 2

• Now Playing23minThings Don't Always Go To Plan
• Now Playing23minQuitting's Not An Option
• Now Playing23minNever Say Never
• Now Playing23minLeaving Your Comfort Zone
• Now Playing23minMaking It Happen
• Now Playing23minTrying Something New
• Now Playing22minTo Be The Best In The World
• Now Playing23minAnything Could Happen
• Now Playing22minThe Lockdown Showdown

HI$TORY With Peter Sagal

• Now Playing15minTranscontinental Railroad
• Now Playing17minCold War
• Now Playing16minCivil War
• Now Playing17minWatergate

History By The Numbers

• Now Playing47min4 Trillion French Fries
• Now Playing47minEverest
• Now Playing47minQueens For Life
• Now Playing47minCrime Bosses
• Now Playing47minCrazy Rich People
• Now Playing47minThe Roaring 20s
• Now Playing47minPsychedelics
• Now Playing47minHeists
• Now Playing47minKing Tut
• Now Playing47minRace To Berlin
• Now Playing47minThe Gender Gap
• Now Playing47minThe Amazon
• Now Playing47minInfidelity
• Now Playing47minParty Animals
• Now Playing47minSkyscrapers
• Now Playing47minAir Travel
• Now Playing47minAstronauts
• Now Playing47minCats & Dogs
• Now Playing47minGenghis Khan
• Now Playing47minThe Great Migration

History: The Interesting Bits

• Now Playing53minHow To Be President
• Now Playing53minHow To Get Away With It
• Now Playing53minHow To Keep A Secret
• Now Playing53minHow To Start A War
• Now Playing53minHow To Make A Fortune
• Now Playing53minHow To Fall In Love
• Now Playing53minHow To Start A Revolution
• Now Playing53minHow To Be Inventive

Illusions

• Now Playing11minReality?
• Now Playing13minBrightness And Contrast
• Now Playing11minMotion
• Now Playing10minThe Classics
• Now Playing10minGrouping

Impossible Escapes: Civil War

• Now Playing31minJohn Doy And The Immortal 10
• Now Playing33minBreaking Out Of Libby Prison
• Now Playing40minPauline Cushman: Tales Of A Yankee Spy
• Now Playing32minRebel Raid In Vermont
• Now Playing42minRobert Smalls: Steamboat To Freedom
• Now Playing37minInto The Rebel Swamp

Inside The Mind Of A Con Artist

• Now Playing53minMatthew Cox
• Now Playing52minChristophe Rocancourt
• Now Playing53minJan Lewan
• Now Playing53minFrédéric Bourdin
• Now Playing52minShaun Greenhalgh
• Now Playing52minHelmut Kiener

Junior Vets

• Now Playing28minFirst Day At Vet School
• Now Playing28minFirst-Hand Vet Experience
• Now Playing28minOvercoming Fears
• Now Playing28minA Mysterious Lump
• Now Playing28minAn Important Job
• Now Playing28minChallenges
• Now Playing28minNo Room For Phobias
• Now Playing28minDouble Emergency
• Now Playing27minProblem Solvers
• Now Playing28minAnd The Winner Is
• Now Playing29minNo Time To Waste
• Now Playing29minHeavy Surgery
• Now Playing28minHealth Check-Ups
• Now Playing28minAnother Busy Day
• Now Playing28minFacing Fears
• Now Playing28minLife-Changing Operation
• Now Playing28minCritical Examination
• Now Playing28minOn Duty
• Now Playing28minTough Challenges
• Now Playing28minTime To Say Goodbye
• Now Playing27minPick Me
• Now Playing26minRoger Has A Problem
• Now Playing27minA Singing Cat
• Now Playing26minSolving A Mystery
• Now Playing26minA Singing Dog

Lysander: The Workhorse

• Now Playing28minLysander: The Workhorse: Part One
• Now Playing27minLysander: The Workhorse: Part Two

My Wild Backyard

• Now Playing30minManyoni Reserve
• Now Playing11minSouthern California
• Now Playing14minJanos Biosphere Reserve
• Now Playing14minNew York City
• Now Playing9minPatagonia

Nature Through Her Eyes

• Now Playing20minCall Of The Wild
• Now Playing15minWho Tells The Story?
• Now Playing16minClimbing The Mountain
• Now Playing14minOne World

Nature's Hidden Miracles

• Now Playing53minThe Secret Life Of Plants
• Now Playing53minInsects As Super Adapters
• Now Playing53minMicroorganisms, The Invisible Ruler

Normandy, Land Of Warriors

• Now Playing51minRollo The Viking: The Conquest
• Now Playing50minWilliam The Conqueror: The Rise
• Now Playing51minRichard The Lionheart: The Fall

NYC Revealed

• Now Playing25minRats
• Now Playing27minTaxis
• Now Playing25minTrash
• Now Playing25minSewage
• Now Playing25minSteam
• Now Playing25minBridges
• Now Playing25minParks
• Now Playing25minAirports
• Now Playing25minElectricity
• Now Playing24minWater
• Now Playing25minWorld Trade Center
• Now Playing25minPigeons
• Now Playing25minEmpire State Building
• Now Playing24minPorts
• Now Playing25minSkyscrapers
• Now Playing25minFood
• Now Playing25minFDNY
• Now Playing25minGrand Central Terminal
• Now Playing25minRoads
• Now Playing25minRecycling

Oddly Satisfying Science

• Now Playing25minScience on Fire
• Now Playing25minInvisible Impacts
• Now Playing25minWater, Water Everywhere
• Now Playing25minMagnificent Mixtures
• Now Playing25minUp and Atom
• Now Playing25minHot Hot Heat
• Now Playing25minExplosive Elements
• Now Playing26minColorful Conundrums
• Now Playing25minDon't Believe Your Eyes
• Now Playing24minThe Sound of Science

Of Knights And Arrows

• Now Playing26minOf Knights And Arrows: Part One
• Now Playing32minOf Knights And Arrows: Part Two

Oops, I Changed the World

• Now Playing52minConditioned
• Now Playing53minBlue Genes
• Now Playing52minThe Beat Goes On
• Now Playing53minFlash Of Success
• Now Playing53minSweet Success
• Now Playing53minAcid Test
• Now Playing52minHair Raising Science
• Now Playing52minDiscovering Drink
• Now Playing52minBigger Bang
• Now Playing52minLaxative Lunacy
• Now Playing53minGet A Grip
• Now Playing53minHow Saran Wrap Saved D-Day
• Now Playing53minSleeping On the Job
• Now Playing53minTeas & Tipple
• Now Playing53minLenin to Lady Gaga

Operation Ouch, Part 1

• Now Playing29minWhat Makes You, You?
• Now Playing28minWhy Do Bones Break?
• Now Playing29minWhat Makes You Go Yuck?
• Now Playing28minDon't Pick Your Scabs!
• Now Playing29minWhy Your Poo Is Brown?
• Now Playing28minHow To Grow A Brain
• Now Playing28minWhat Thumbs Are For
• Now Playing28minHow Your Reflexes Can Save You
• Now Playing29minWhy Is Sweat Salty
• Now Playing29minGet Your Body Moving!
• Now Playing28minWhy Are Some People Faster Than Others?
• Now Playing28minIs My Body Electric?
• Now Playing29minThe Body Roadtrip! (Best Of)
• Now Playing29minThe Ouch! Awards (Special)
• Now Playing31minThe Life Fix (Special)
• Now Playing28minWe're Having A Baby
• Now Playing28minDoctors Face Off!
• Now Playing28minThere's A Lizard In The Lab!
• Now Playing28minLoud, Loud, Louder!
• Now Playing28minWhat Are Vaccinations For?
• Now Playing28minSlime, Snot And Bogies!
• Now Playing29minFlexible Arms And Triple Jumping!
• Now Playing29minKnobbly Knees And What They Are For
• Now Playing28minYour Brilliant Brain And Sparky Signals
• Now Playing29minAll Hail King Xand!

Operation Ouch, Part 2

• Now Playing29minMighty Muscles!
• Now Playing29minBlood Super-Highway
• Now Playing29minBattle Of The Blood Cells
• Now Playing30minThe Ouch! Awards 4
• Now Playing28minIt's Hairy!
• Now Playing29minHow Can You See In The Dark?
• Now Playing28minMagnificent Mucus
• Now Playing29minMind You Don't Fall!
• Now Playing28minTendon Take Off!
• Now Playing29minMouth V Knee
• Now Playing29minYou're Mostly Made Of Water!
• Now Playing29minExplosive Energy!
• Now Playing29minFingers On Buzzers!
• Now Playing29minIt's A Lung Slide!
• Now Playing29minEarmageddon!
• Now Playing29minHeroic Hippocampus
• Now Playing29minTotally Gross!
• Now Playing29minOperation Ouch! Does Space
• Now Playing29minLet's Talk About Cancer

Operation Ouch: Ouchtastic

• Now Playing29minOuchtastic! Skeleton
• Now Playing29minOuchtastic! Digestion
• Now Playing29minOuchtastic! Ears
• Now Playing29minOuchtastic! Eyes
• Now Playing29minOuchtastic! Teeth

Planet Insect

• Now Playing55minPart One: Small Creatures, Big Lives
• Now Playing55minPart Two: The Next Generation
• Now Playing57minPart Three: Hive Minds

Prescription: Nutrition

• Now Playing18minEpisode 1: Green Revolution
• Now Playing18minEpisode 2: Grain Of Truth
• Now Playing18minEpisode 3: Nature's Candy
• Now Playing16minEpisode 4: Spilling The Beans

Proof Of Concept

• Now Playing51minConceiving Consciousness
• Now Playing50minRandomness & Probability
• Now Playing50minTruth & Logical Paradox
• Now Playing50minThe Infinite

Race With A Lady

• Now Playing30minRace With A Lady: Part I
• Now Playing30minRace With A Lady: Part II

Rebuilding Ancient Rome

• Now Playing5minAra Pacis
• Now Playing4minBaths Of Caracalla
• Now Playing4minCircus Maximus
• Now Playing4minColosseum
• Now Playing3minCuria Julia
• Now Playing6minDomus Aurea Outside
• Now Playing3minForum Of Augustus
• Now Playing5minForum Of Peace
• Now Playing4minHarbor Of Trajan
• Now Playing5minOstia Antica
• Now Playing5minPantheon
• Now Playing4minStadium Of Domitian
• Now Playing4minTemple Of Jupiter
• Now Playing6minRoman Forum
• Now Playing6minTheater Of Pompey

Rescued Chimpanzees Of The Congo With Jane Goodall

• Now Playing53minBuilding The Dream
• Now Playing53minNew Arrivals
• Now Playing53minMaking Friends
• Now Playing53minThe Big Move
• Now Playing53minHope
• Now Playing51minPath to Freedom
• Now Playing50minHeroes
• Now Playing50minExpect the Unexpected
• Now Playing50minIsland Life
• Now Playing50minAll Animals Welcome
• Now Playing51minReady to Go

Royals: Keeping The Crown

• Now Playing50minThe Cousins' War
• Now Playing50minNazi Royals
• Now Playing50minPost-War Amnesia
• Now Playing50minBreaking Tradition
• Now Playing50minRebel Princess
• Now Playing50minThe Pursuit of Normal

Running The Wild

• Now Playing25minCopenhagen
• Now Playing25minLondon
• Now Playing25minParis
• Now Playing25minCroatia
• Now Playing25minSantorini
• Now Playing25minBest Of Ep. 1 To 5
• Now Playing25minLisbon
• Now Playing25minDelhi
• Now Playing25minMexico City
• Now Playing25minGran Canaria
• Now Playing25minJamaica
• Now Playing25minBest Of Ep. 7 To 11

Scanning The Nile

• Now Playing53minLost Cities Of The Delta
• Now Playing53minLost Routes To The Pyramids
• Now Playing51minTraces Of The Pharaohs Of Luxor
• Now Playing53minMaterials Convoys: A Pharaonic Task

Schnellbomber

• Now Playing26minSchnellbomber: Part One
• Now Playing22minSchnellbomber: Part Two

Science In Archaeology 3.0

• Now Playing51minMaking Objects Speak
• Now Playing53minMaking The Dead Speak
• Now Playing51minMaking Sites Speak
• Now Playing52minMaking The Invisible Speak

Sea Hunters

• Now Playing20minHumpback Gang
• Now Playing20minOrcas vs. Humpback
• Now Playing20minSea Lions vs. Orcas
• Now Playing20minDolphins and Gannets
• Now Playing20minSeals vs. Hyennas
• Now Playing20minWhales vs. Gulls

Secret Lifes of Sharks

• Now Playing14minGreat White Shark
• Now Playing12minHammerhead Shark
• Now Playing15minTiger Shark

Silly Sustainability

• Now Playing18minCan You Power A Lawnmower With Grass?
• Now Playing19minK-Cups/Recycled Plastic into Shoes
• Now Playing15minCardboard Lumber Part 1
• Now Playing20minCardboard Lumber Part 2

Siyaya: Wildest Cape

• Now Playing25minCederberg - The Secret Library
• Now Playing25minDe Hoop - Place Of Hope
• Now Playing25minGoukamma - A Last Wild
• Now Playing25minWest Coast - Heading For Bird Island
• Now Playing25minLambert's Bay Bird Island - Where The Birds Are In Charge
• Now Playing25minThe Hottentots Holland Mountains - Crossing The Mountains
• Now Playing25minHottentots Holland Nature Reserve - On Angel's Wings
• Now Playing25minThe Hottentots Holland Mountains - Unfinished Business
• Now Playing25minKogelberg - Source To Sea
• Now Playing25minRobberg - Learning About Survival
• Now Playing25minRobberg - The Exploration Continues
• Now Playing25minAnysberg - Hidden Gem Of The Klein Karoo
• Now Playing25minGamkaberg - Mountain Fortress

Space Greed

• Now Playing11minDeclaring Martian Law
• Now Playing12minSol Ownership: Can a Corporation Own The Sun?
• Now Playing11minTerraforming: Can We Build a Planet B?
• Now Playing12minCarbon Costs: Is Space Exploration Even Worth It?
• Now Playing12minLooting the Moon For Trillions of Dollars
• Now Playing12minAsteroid Mining: Is The Next Gold Rush in Space?
• Now Playing11minEndangered Aliens: Will Humans Trash Space?
• Now Playing12minSpace Cowboys: Who Will Wrangle Asteroids and Save The Earth?
• Now Playing13minArming Space Force
• Now Playing11minAbove the Law
• Now Playing12minToxic Space Factories
• Now Playing12minSuing Our Way to Space
• Now Playing15minWill Satellites Help Us Save or Exploit Earth?
• Now Playing12minSpace Pirates
• Now Playing11minMad Scientists in Outer Space
• Now Playing12minSpace as a Tax Haven
• Now Playing15minGoing So Fast Time Slows Down
• Now Playing14minSpace & Shelter
• Now Playing13minWorld Wide Wifi
• Now Playing14minStrange Space Recipes

Space Phenomena

• Now Playing49minAlien Planets
• Now Playing48minBlack Holes

Space Probes!

• Now Playing53minInner Planets
• Now Playing53minOuter Planets
• Now Playing30minVoyager: The Grand Tour
• Now Playing26minCassini and The Crown Jewel
• Now Playing27minRed Rovers
• Now Playing23minPluto's Heart
• Now Playing20minOur Inner Circles of Hell
• Now Playing24minFuture Missions

Speed

• Now Playing50minAcross Oceans
• Now Playing53minAcross Continents
• Now Playing54minInto the Skies
• Now Playing54minInto Space

Stephen Hawking's Favorite Places

• Now Playing27minPart 1
• Now Playing28minPart 2
• Now Playing28minPart 3

Suppressed Science

• Now Playing26minMerging Man & Machine
• Now Playing26minThe Suppressed Science Of Psychedelics
• Now Playing25minRace: Science, Social Construct, or Both?
• Now Playing24minWeather Control: The Debate Over Geo-Engineering
• Now Playing23minWeather Control: The Debate Over Geo-Engineering
• Now Playing22minGenetic Editing
• Now Playing22minAlternative Energy Sources
• Now Playing22minTheories Of Everything

Tech Toys, Part 1

• Now Playing26minTechploration
• Now Playing26minFuture Now
• Now Playing23minTransport And Design
• Now Playing23minInnovation Lift Off
• Now Playing23minDesign Inspired
• Now Playing23minMultilevel Mobility
• Now Playing23minTransport Tech
• Now Playing23minEdge Of Elevation
• Now Playing23minShutter Speed
• Now Playing23minMachines In Motion
• Now Playing23minSpeed Of Sound
• Now Playing23min4 Wheels Of Wonder
• Now Playing23minReady, Set, Go
• Now Playing23minFace Of Innovation
• Now Playing23minSky's The Limit
• Now Playing23minIconic Innovation
• Now Playing23minDriving Into The Future
• Now Playing23minElectric Revolution
• Now Playing23minTransport Through Time
• Now Playing23minElectrified
• Now Playing23minShift In Transport
• Now Playing23minSpeed + Efficiently
• Now Playing23minForm Meets Function
• Now Playing23minTomorrow's Transport
• Now Playing23minThe Innovation Game

Tech Toys, Part 2

• Now Playing23minDevelop. Design. Print.
• Now Playing23minFour Eyes, Four Wheels
• Now Playing23minTechnology Refueled
• Now Playing23minUrban Electric
• Now Playing23minSpeed + Sound
• Now Playing23minTransport Inspired
• Now Playing23minTaking Flight
• Now Playing23minJet Power
• Now Playing23minTilt And Kick
• Now Playing23minFly And Hover
• Now Playing23minTransport + Games
• Now Playing23minTransformation
• Now Playing23minElectrified
• Now Playing23minLand + Sea
• Now Playing23minFlying High
• Now Playing22minRoaming In Technology
• Now Playing22minTwo, Three, Four Wheels
• Now Playing22minSuper Car, Super Bike
• Now Playing22minLand, Sea, And Power
• Now Playing22minThe Future Of Transport
• Now Playing22minSpeed Meets Design
• Now Playing22minDrifting In Style
• Now Playing22minOff Road Power
• Now Playing22minThe Flying Car
• Now Playing22minThe Anatomy Of A Supercar

Terror!

• Now Playing44minThe Hotel: Jerusalem, 1946
• Now Playing45minThe Bar: Algiers, 1956
• Now Playing44minThe Games: Munich 1972
• Now Playing45minThe Station: Bologna, 1980
• Now Playing45minThe Ship: USS Cole, 2000
• Now Playing45minThe Island: Norway, 2011

The Convair Jetliners

• Now Playing25minThe Convair Jetliners: Part One
• Now Playing23minThe Convair Jetliners: Part Two

The Dengineers

• Now Playing29minSurvival Den
• Now Playing29minMusic Den
• Now Playing29minFootball Den
• Now Playing29minHawaii Den
• Now Playing29minDance Den
• Now Playing29minKitchen Den
• Now Playing29minArt Den
• Now Playing29minTrain Den
• Now Playing29minSpy Den
• Now Playing29minCommunity/School Den
• Now Playing29minHighlights
• Now Playing29minMagical Library Den
• Now Playing29minDJ Den
• Now Playing29minAdventure Den
• Now Playing29minEco Den
• Now Playing29minJournalism Den
• Now Playing29minPlane Den
• Now Playing29minCommunity Den
• Now Playing29minGingerbread House Den
• Now Playing29minBollywood Den
• Now Playing29minHollywood Cinema Den
• Now Playing29minHighlights
• Now Playing29minRevisits - Part I
• Now Playing29minRevisits - Part II
• Now Playing29minObservatory Den

The History Of Food

• Now Playing30minThe Invention of Cooking
• Now Playing34minThe Agricultural Revolution
• Now Playing34minFermentation, Preservation and Exploration
• Now Playing28minThe Industry of Food
• Now Playing32minThe Future of Food

The History of Home Narrated by Nick Offerman

• Now Playing1hr 3minThe Foundations of Home - Structure and Shelter
• Now Playing54minThe Hall, the Kitchen, the Dining Room, the Living Room
• Now Playing1hr 4minThe Second Story - Private Life

The History Of Home Presents

• Now Playing24minThe Rich & The Royal
• Now Playing25minHearst Castle
• Now Playing24minHampton Court Palace
• Now Playing24minMonticello

The Humboldt Current

• Now Playing52minGenesis
• Now Playing52minRenewal
• Now Playing52minArrival

The Lightbulb Moment

• Now Playing22minLike Button: The Unintended Consequences Of The Facebook Like Button
• Now Playing25minCubicle: How The Cubicle Became Universally Hated
• Now Playing23minBarcode: How The Barcode Shaped Our Modern Economy
• Now Playing25minFlorida: How Real Estate Rogues Invented Florida As We Know It
• Now Playing23minMauve: The Fake Color That Made Our Modern World
• Now Playing24minVanilla: The Bean That Shaped The Future Of Food
• Now Playing24minWi-Fi: The Hollywood Actress Who Laid The Groundwork For Wi-Fi
• Now Playing24minStreaming: The Invention That Revolutionized Streaming Video
• Now Playing23minInterstate: How The Interstate Connected And Divided America
• Now Playing28minEdison: How Edison Reinvented Invention

The Log Book Series

• Now Playing39minSteve Pisanos: The Flying Greek
• Now Playing38minKen Wallis: A Man And His Autogyro
• Now Playing28minGeorge Stanley McGovern

The Pet Rescuers

• Now Playing22minA Second Chance
• Now Playing24minOne Step At A Time
• Now Playing24minEveryday Challenges
• Now Playing24minRescue And Recovery
• Now Playing23minMilestones
• Now Playing23minThe Mono-Eyed Cat
• Now Playing23minBella And Homer
• Now Playing24minHeidi's New Home
• Now Playing25minIt's A Match
• Now Playing23minNot An Ordinary Day
• Now Playing23minGoing Ga-Ga
• Now Playing25minNew Tricks
• Now Playing22minVet Visits
• Now Playing23minDoggy Etiquette
• Now Playing25minHe Needs A Job
• Now Playing24minNew Beginnings
• Now Playing24minBusy Day
• Now Playing23minStrange Habits
• Now Playing22minA Major Challenge
• Now Playing25minUnder Pressure
• Now Playing24minNo Time To Waste
• Now Playing25minA Bright Future
• Now Playing24minOvercoming Trauma
• Now Playing24minA Bittersweet Day
• Now Playing22minMagnificent Beast

The Secret Lives Of Big Cats

• Now Playing36minThe Secret Lives Of Tigers
• Now Playing27minThe Secret Lives Of Snow Leopards
• Now Playing30minThe Secret Lives Of Pumas
• Now Playing33minThe Secret Lives Of Lions
• Now Playing37minThe Secret Lives Of Leopards
• Now Playing33minThe Secret Lives Of Jaguars
• Now Playing29minThe Secret Lives Of Cheetahs

The Secrets To Civilization

• Now Playing52minBronze Age Catastrophe
• Now Playing52minCities And Empires
• Now Playing53minEmpire And Epidemics

The Tracker's Diary: Bears Of Katmai

• Now Playing28minThe Last Frontier
• Now Playing22minFish Like a Bear
• Now Playing24minA Working Ecosystem
• Now Playing25minThe Wolf and The Storm
• Now Playing25minNeighbors, Old and New
• Now Playing22minNo Place Like Home

The Vikings

• Now Playing46minOrigin of the Vikings
• Now Playing45minEarly Viking Society and Religion
• Now Playing45minThe Ships of the Vikings
• Now Playing45minWeapons of the Vikings

The World Of Bridges

• Now Playing27minChina
• Now Playing27minWales
• Now Playing27minIndia
• Now Playing27minZimbabwe

The Year That Rocked The World

• Now Playing53min1977
• Now Playing53min1981
• Now Playing53min1989
• Now Playing53min1997
• Now Playing53min2004

Tycoons

• Now Playing53minUSA
• Now Playing53minRussia
• Now Playing53minChina

Ultimate Goal

• Now Playing46minKick Off
• Now Playing48minTake The Chance
• Now Playing47minCutback
• Now Playing47minFinal Squad
• Now Playing47minTeamship
• Now Playing49minMatch Day
• Now Playing46minGrassroots
• Now Playing47minNo Excuses
• Now Playing49minSelection Day
• Now Playing49minChange Of Pace
• Now Playing48minFinal Preparations
• Now Playing49minThe Game

Underwater Wonders Of The National Parks

• Now Playing16minDevils Hole
• Now Playing14minMontezuma Well
• Now Playing24minUSS Arizona: Part 1
• Now Playing19minUSS Arizona: Part 2
• Now Playing13minBuck Island
• Now Playing13minLake Mead
• Now Playing12minYellowstone

Underworld

• Now Playing53minGreat Britain
• Now Playing53minGibraltar
• Now Playing53minSlovenia
• Now Playing53minBelize
• Now Playing53minChina

What Went Wrong?

• Now Playing47minThe Grenfell Tower Fire
• Now Playing49minThe Challenger Shuttle Disaster
• Now Playing47minThe Concorde Air Crash
• Now Playing46minThe Disappearance Of Malaysia Airlines MH370

Wow That's Amazing

• Now Playing23minContagious Yawns
• Now Playing23minStatic Electricity
• Now Playing23minPendulums
• Now Playing23minThe Forces Of Inertia
• Now Playing23minIllusion
• Now Playing23minKinetic Energy
• Now Playing23minBuoyancy Force
• Now Playing23minTelescopes
• Now Playing23minDetecting Lies
• Now Playing23minA Vanishing Trick
• Now Playing23minSpace Suits
• Now Playing23minMovie Effects
• Now Playing23minThe Centre Of Gravity
• Now Playing23minSimultaneous Contrast
• Now Playing23minMagic Tricks
• Now Playing23minAir Pressure
• Now Playing23minFun Photography Ideas
• Now Playing23minA Hologram Projector
• Now Playing23minAfterimages
• Now Playing23minSensory Deprivation
• Now Playing23minAn Optical Illusion
• Now Playing23minA Card Trick
• Now Playing23minTransferring Sound
• Now Playing23minChemical Reactions
• Now Playing23minFacial Symmetry

Specials, Part 1

• Now Playing24min2023: A Space Odyssey
• Now Playing25minAI Tipping Point
• Now Playing20minAmerica's World War I Centennial
• Now Playing25minArea Bombing
• Now Playing1hr 16minAsteroids: The Source Of Life?
• Now Playing34minAttack Of The Zombie Fungus
• Now Playing1hr 33minBessie Coleman: Queen Of The Skies
• Now Playing30minBirth Of The Solar System
• Now Playing34minBuff In Vietnam
• Now Playing27minCanards Of War
• Now Playing26minCmdr. J. R. "Hotdog" Brown on the Air War in Vietnam
• Now Playing30minConscious Capitalism
• Now Playing19minCooking The Ultimate Steak
• Now Playing38minCornfield Shipwreck
• Now Playing36minDebugged
• Now Playing52minDestination: Pluto Beyond The Flyby
• Now Playing35minDr. Sanator: Legacy
• Now Playing22minDreaming In Overdrive: The John Staluppi Story
• Now Playing24minEarly British Jets
• Now Playing45minEclipse: Science And Awe
• Now Playing34minEngines of Change
• Now Playing23minEpic Collections: The Ed Ewing Collection
• Now Playing10minEvolution Of Exercise
• Now Playing42minFighting For Lincoln: The Wide Awakes
• Now Playing1hr 30minGoing Circular

Specials, Part 2

• Now Playing31minLt. Gen. Spence Armstrong On The Air War In Vietnam
• Now Playing18minMars: The Journey
• Now Playing46minMathemagics
• Now Playing51minMeet The Mustelids
• Now Playing46minMercedes-Benz: 125 Years
• Now Playing28minMIA: Hunt For A WWII Plane
• Now Playing21minMighty Mouse
• Now Playing51minMiniverse
• Now Playing25minNever Home Alone: The Wildlife Of Kitchens, Bathrooms, And Beyond
• Now Playing24minOperation Lusty: Hunt For The First Nazi Jet
• Now Playing19minOur Violent Sun
• Now Playing53minPeru: Sacrifices In The Kingdom Of Chimor
• Now Playing52minPompeii: Buried Secrets Of The Villa Giuliana
• Now Playing53minPrehistoric Worlds
• Now Playing1hr 4minPumped Dry: The Global Crisis of Vanishing Groundwater
• Now Playing44minPutin And The Oligarchs
• Now Playing53minPyramids Builders: New Clues
• Now Playing33minRace For The Superfortress
• Now Playing35minRainbow 5
• Now Playing21minRapidly Evolving Human With Spencer Wells
• Now Playing1hr 32minRed Elvis: The Cold War Cowboy
• Now Playing53minRescued Chimpanzees Of The Congo With Jane Goodall Special
• Now Playing51minReturn To The Moon
• Now Playing33minRunway Of Thunder: The Story Of Project Zelmal
• Now Playing53minSagrada Familia: The Gaudi Revolution

Specials, Part 3

• Now Playing29minThe Comet Bomber
• Now Playing27minThe Everlasting Hawker Hunter
• Now Playing24minThe Hunt For Dark Matter
• Now Playing25minThe Hunt For The Slave Ship Guerrero
• Now Playing27minThe Hütter Brothers
• Now Playing53minThe Last Persian Shah
• Now Playing56minThe Lucy Mission: Origins Of The Solar System
• Now Playing52minThe Mystery Of The Cosquer Cave
• Now Playing53minThe Mystery Of The Giant Birds
• Now Playing52minThe Origami Code: Scientists Uncover The Power Of Folding
• Now Playing16minThe Rise & Fall Of T-Rex
• Now Playing28minThe Rise Of Lincoln
• Now Playing50minThe True Story of Pirates
• Now Playing53minThe Untold Story Of The Vatican
• Now Playing56minTop Science Stories Of 2016
• Now Playing53minTop Science Stories Of 2017
• Now Playing1hr 20minTop Science Stories of 2018
• Now Playing1hr 8minTop Science Stories of 2019
• Now Playing1hr 4minTop Science Stories of 2020
• Now Playing1hr 8minTop Science Stories of 2021
• Now Playing1hr 3minTop Science Stories Of 2022
• Now Playing1hr 2minTop Science Stories Of 2023
• Now Playing23minUSA TODAY Investigates: Roadside Memorials and Why People Make Them
• Now Playing33minVice Admiral Jerry Miller on the Korean Conflict
• Now Playing26minVice Admiral Robert F. Dunn: Naval Aviator