NOVA

The Planets: Inner Worlds Preview

Preview: Season 46 Episode 12 | 26s  | Video has closed captioning.

The rocky planets—Mercury, Venus, Earth and Mars—were born of similar material around the same time. Yet only one of them supports life. Were Earth's neighbors always so extreme? And is there somewhere else in the solar system life might flourish?

Aired: 07/24/19

Rating: NR

Problems Playing Video? | Closed Captioning

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