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Mars Used to Be Blue... Then Something Happened

Season 13 Episode 12 | 11m 08s

Why is the Martian sky red by day… but blue at sunset? And how did it used to look more like Earth? The strange story of Mars’ skies can reveal a lot about the Red Planet's past, and the surprising ways it is more like Earth than you may know.

Aired: 10/22/25
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