Playback serverIf a title won’t play, switch servers.
The Universe
Season 5 · Episode 2
Mars: The New Evidence
0.045mAugust 5, 2010
A look for evidence of life on Mars which provides many clues that it now, or once had supported it; from the remains of lakes and rivers that once flowed on the surface; to the water ice frozen at the poles; to the seasonal changes in methane gases that may prove bacterial life still thrives underground.