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what happened to...

japan rocks/andromeda
in Astronomy and Cosmology

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What happened to mars there is a theory that there was life on mars is it true. I think so mars has valleys and ice. So was there liquid water or not if not why were there valleys.:confused::confused::confused:

"Mars is also roughly intermediate in size, mass, and surface gravity between Earth and Earth's Moon (the Moon is about half the diameter of Mars, whereas Earth is twice; the Earth is about nine times more massive than Mars, and the Moon one-ninth as massive)."

 

Interesting facts about Earth, Mars, Moon: Earth is twice Mars' diameter, and Mars is twice Moon's diameter. Earth is 9 times as massive as Mars, and Mars is 9 times as massive as the Moon. All from wikipedia, thanks to Spyman.

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