Life is Impossible

Horizon investigates how life began on Earth. Did it evolve on land surfaces on Earth, in the sea, or in space?

Other episodes for this season

Awakening the Frozen Addicts
Episode 1 - Awakening the Frozen Addi...
Cheating Time
Episode 2 - Cheating Time
TB - The Forgotten Plague
Episode 3 - TB - The Forgotten Plague
No Ordinary Genius (1)
Episode 4 - No Ordinary Genius (1)
No Ordinary Genius (2)
Episode 5 - No Ordinary Genius (2)
Mars Alive
Episode 6 - Mars Alive
Suggers, Fruggers and Data-Muggers
Episode 7 - Suggers, Fruggers and Dat...
The Pyramid Builders
Episode 8 - The Pyramid Builders
Here Be Monsters
Episode 9 - Here Be Monsters
Iceman (Update)
Episode 10 - Iceman (Update)
Whatever Happened to Star Wars
Episode 11 - Whatever Happened to Star...
Resurrecting the Dead Sea Scrolls
Episode 12 - Resurrecting the Dead Sea...
Dante Goes to Hell
Episode 13 - Dante Goes to Hell
Ghosts in the Dinosaur Graveyard
Episode 14 - Ghosts in the Dinosaur Gr...
The New Alchemists
Episode 15 - The New Alchemists
Allergic to the 20th Century
Episode 16 - Allergic to the 20th Cent...
Wot U Looking At?
Episode 17 - Wot U Looking At?
The Electronic Frontier
Episode 18 - The Electronic Frontier
A Vital Poison
Episode 19 - A Vital Poison
Chimp Talk
Episode 20 - Chimp Talk
Life is Impossible
Episode 21 - Life is Impossible