330-335: Ancient Mars: Wet in Many Places -- Paige 307 (5715): 1575

Ancient Mars: Wet in Many Places -- Paige 307 (5715): 1575 -- Science:

New results from the Mars Express Orbiter mission reveal multiple deposits of minerals formed in the presence of liquid water. They reinforce the conclusion that ancient Mars was warmer and wetter than it is today, and increase the number of promising localities to search for evidence of past life.

How do we know what to look for on Mars? Evolutionary biology on earth.