Gullies on Mars show tantalizing signs of recent water activity
Monday, March 2, 2009 - 10:07
in Astronomy & Space
(PhysOrg.com) -- Planetary geologists at Brown University have found a gully fan system on Mars that formed about 1.25 million years ago. The fan offers compelling evidence that it was formed by melt water that originated in nearby snow and ice deposits and may stand as the most recent period when water flowed on the planet.