Curiosity rover finds its crater was habitable for 700 million years0
- From Around the Web, Space
- June 10, 2017
And there are indications that groundwater persisted for far longer.
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Gale crater
Evidence from Curiosity Rover Shows Mars Once Had Oxygen-Rich Atmosphere0
- From Around the Web
- May 3, 2016
Two examples of manganese-rich rock samples studied by Curiosity, indicating that Mars once had a lot more oxygen in its atmosphere.
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