View Full Version : A River Ran Through It: Why Do They Think There Was Once Water on Mars?

2012-Sep-28, 07:50 PM
This week’s big news was the announcement of evidence for flowing water on Mars, based on images of what appear to be smooth river rock-type pebbles found by Curiosity. Of course that’s a big statement to make, and for good reason — identifying water, whether present or past, is one step closer to determining whether [...]

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