NOVA

The Planets: Mars Preview

Preview: Season 46 Episode 13 | 28s | Video has closed captioning.

Mars was once a blue water-world studded with active volcanoes. But when its magnetic field and protective atmosphere faded, it became the frozen desert planet we know today. With so many necessary elements in place, did life ever form on Mars?

Aired: 07/24/19

Rating: NR

Problems Playing Video? | Closed Captioning

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