Dry ice, not water, responsible for many gullies on Mars, study says
Monday, December 21, 2015 - 14:10
in Astronomy & Space
Gullies on Mars that appeared to have possibly been carved by water were probably dug out by great chunks of dry ice, a pair of French researchers say. Even as certain lines of evidence mount for the very occasional occurrence of water on present-day Mars, the findings published by the journal...