The rocky planets - Mercury, Venus, Earth and Mars - were born of similar material around the same time, yet only one supports life. Were Earth's neighbors always so extreme? Is there somewhere else in the solar system where life might flourish?
Episode Duration: 53 minutes and 46 seconds
Episode Number: 4612
No future air times were found for this episode.
PBS' premier science series helps viewers of all ages explore the science behind the headlines.
Along the way, NOVA programs demystify science and technology and highlight the people involved in scientific pursuits.
WENH-TV Ch. 11 Durham
WLED-TV Ch. 48 Littleton
WEKW-TV Ch. 18 Keene
W50DP-D Ch. 50 Hanover
W34DQ-D Ch. 34 Pittsburg