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For one, we know there are polar ice caps on mars that consist of ice. Second, there are gorges that show where water once flowed.

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Q: What is the main evidence that water once existed on mars?
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Why was the Mars Exploration Rover mission is considered a success?

It provided a great deal of evidence that water existed on Mars in the past.


What type of germs are there on Mars?

Currently there is no evidence that life exists or ever existed on mars, so it is unknown


Does life existed on mars 400 years ago?

There is no evidence so far that life exists on Mars - or that it ever existed there. Of course, it may have existed - more research is required to be sure.


What evidence is there that water has been flowing on Mars recently?

NASA photographs of Mars are the best evidence that water has been flowing on Mars recently. During warmer periods in Mars' atmosphere, the photographs show streaks that look like streams. Scientists agree that this is evidence of water on Mars.


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While the preliminary evidence would indicate a resounding "No!", further investigations seem to lead us to believe that water once existed on Mars. Therefore, floods wereat one time possible.


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The robots sent to Mars have found Water Ice in large quantities on the surface of Mars.


Why can humans live on mars?

it has evidence of water


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