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?
Duration: 56 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.
| Thu, Dec 18 | 1:00 A.M. | Polar Extremes NHPBS (11.1) |
| Fri, Dec 19 | 3:00 P.M. | Polar Extremes NHPBS (11.1) |
| Sat, Dec 20 | 11:00 A.M. | The Planets: Mars NH Explore (11.2) |
| Sat, Dec 20 | 1:00 P.M. | Polar Extremes NH Explore (11.2) |
| Sun, Dec 21 | 1:00 A.M. | Polar Extremes NHPBS (11.1) |
| Sun, Dec 21 | 4:00 A.M. | Polar Extremes NH Explore (11.2) |
| Sun, Dec 21 | 7:00 A.M. | London Super Tunnel NHPBS (11.1) |
| Sun, Dec 21 | 8:00 P.M. | Polar Extremes NH Explore (11.2) |
| Sun, Dec 21 | 10:00 P.M. | The Planets: Mars NH Explore (11.2) |
| Mon, Dec 22 | 12:00 A.M. | Polar Extremes NH Explore (11.2) |
| Mon, Dec 22 | 2:00 A.M. | The Planets: Mars NH Explore (11.2) |
| Tue, Dec 23 | 7:00 P.M. | Polar Extremes NH World (11.3) |
| Wed, Dec 24 | 12:00 A.M. | Polar Extremes NH World (11.3) |
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| Fri, Dec 26 | 3:00 P.M. | Dog Tales NHPBS (11.1) |
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