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PBS Space Time

Season 2015 · Episode 38

Why Haven't We Found Alien Life?

0.013mNovember 5, 2015

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Episode 1What Planet is Super Mario World?
Episode 2Is It Irrational to Believe in Aliens?
Episode 3How Do You Measure the Size of the Universe?
Episode 4Should We Colonize Venus Instead of Mars?
Episode 5What Will Destroy Planet Earth?
Episode 6Can A Starfox Barrel Roll Work In Space?
Episode 7Cosmic Microwave Background Explained
Episode 8Is the Moon in Majora’s Mask a Black Hole?
Episode 9Could You Fart Your Way to the Moon?
Episode 10How to Weigh a Fart
Episode 11Could NASA Start the Zombie Apocalypse?
Episode 12Are Space and Time An Illusion?
Episode 13What's the Most Realistic Artificial Gravity in Sci-Fi?
Episode 14Should the First Mars Mission Be All Women?
Episode 159 NASA Technologies Shaping YOUR Future
Episode 16The Real Meaning of E=mc²
Episode 17Habitable Exoplanets Debunked!
Episode 18Is Gravity An Illusion?
Episode 19Challenge: What Happens to a Helium Balloon in Freefall?
Episode 20How to Signal Aliens
Episode 21The Calendar, Australia & White Christmas
Episode 22Can a Circle Be a Straight Line?
Episode 23Curvature Demonstrated + Comments
Episode 24The Leap Second Explained
Episode 25Can You Trust Your Eyes in Spacetime?
Episode 26SPECIAL ANNOUNCEMENT + Flat Spacetime Geometry Comments
Episode 27General Relativity & Curved Spacetime Explained!
Episode 28What Physics Teachers Get Wrong About Tides!
Episode 29Challenge: Which Particle Wins This Race?
Episode 30Do Events Inside Black Holes Happen?
Episode 31Watch THIS! (New Host + Challenge Winners)
Episode 32Does Dark Matter BREAK Physics?
Episode 33What Happens At The Edge Of The Universe?
Episode 34The Speed of Light is NOT About Light
Episode 355 REAL Possibilities for Interstellar Travel
Episode 36Have Gravitational Waves Been Discovered?!?
Episode 37Is The Alcubierre Warp Drive Possible?
Episode 38Why Haven't We Found Alien Life?
Episode 39Challenge: Can you save Earth from a Killer Asteroid?
Episode 405 Ways to Stop a Killer Asteroid
Episode 41100 Years of Relativity + Challenge Winners!
Episode 42How to Build a Black Hole
Episode 43The Higgs Mechanism Explained