Once upon a time on Mars, there was a crater that had a massive lake that may have hosted life. Now researchers are saying that a whole variety of organisms could have flourished there. Sure, that life was probably just microbial, but this is another exciting step toward understanding just how habitable Mars may have been around 3.5 billion years ago.
Petrified mud that was once at the bottom of the lake suggests that, at the time, the lake had different chemical environments that could have hosted different types of microbes. The rocks also show that the Red Planet’s climate may have been more dynamic than we thought, going from cold and dry to warm and wet, before eventually drying out.
We still don’t know whether life once existed on...
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