We also know that the Earth has water, so why doesn't Mars?
The Mars spacecraft missions beamed back dramatic evidence that Mars had liquid water at some point:
Mariner 9 (1971):
Viking (1976):
And the Mars Orbiter Camera (1997-):
Questions:
(tons
of cool Rover images here!)
But what about water?
"El
Capitan", showing water-rich minerals jarosite
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Hematite
beads in Mars rock -- form in the presence of water
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