Early Mars was covered in ice sheets, not flowing rivers, researchers say

ScienceDaily
Aug 3, 2020, 12:01 pm93 pts
A large number of the valley networks scarring Mars's surface were carved by water melting beneath glacial ice, not by free-flowing rivers as previously thought, according to new research. The findings effectively throw cold water on the dominant 'warm and wet ancient Mars' hypothesis, which postulates that…

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