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Proof that water flowed on Mars
Topic Started: May 31 2013, 08:10 PM (226 Views)
CJ
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A very minor case of serious brain damage

http://www.bbc.co.uk/news/science-environment-22708902

Scientists now have definitive proof that many of the landscapes seen on Mars were indeed cut by flowing water.

The valleys, channels and deltas viewed from orbit have long been thought to be the work of water erosion, but it is Nasa's latest rover, Curiosity, that has provided the "ground truth".

Researchers report its observations of rounded pebbles on the floor of the Red planet's 150km-wide Gale Crater.

Their smooth appearance is identical to gravels found in rivers on Earth.

Rock fragments that bounce along the bottom of a stream of water will have their edges knocked off, and when these pebbles finally come to rest they will often align in a characteristic overlapping fashion.



I thought it was highly likely; in fact, I thought there already was proof of it, but it's nice that we have proof now :) !
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Shiny Star
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Irrelevant but still relevant

That's pretty interesting, I've always thought that there was.
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CJ
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A very minor case of serious brain damage

Yet more evidence:

http://www.bbc.co.uk/news/science-environment-22832673

The Opportunity rover has discovered a rock containing clay minerals. These would probably have been created as a result of prolonged contact with water.
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