SoylentNews

xpda [xpda.com] writes:

A numerical model indicates that some of -- and possibly all -- the gullies found on Mars were not caused by flowing liquid water [sciencedaily.com]. According to a paper published December 21 in Nature Geoscience [nature.com], Martian gullies can result from geologic dry ice processes that have no terrestrial analogues and do not require liquid water. Such dry ice processes may have helped shape the evolution of landforms elsewhere on the martian surface. The areas around the gullies probably do not provide potential habitable environments for life in Mars's recent past, as has been widely speculated. NASA's evidence also indicates the gullies were formed by dry ice [nasa.gov] rather than liquid water.

Original Submission