What observations on Mars indicate that conditions been suitable for life in the may have past?

1 Answer
chandramohanPanakkal
May 3, 2016

dried river beds is visible on many parts of Mars surface.
Sediments deposited by water were found by rovers like spirit and opportunity,.

Explanation:

All these indicate that there were liquid water on mars in earlier period.enter image source here
Picture credit geology ISU edu.

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