A new study from The University of Texas at Austin is helping scientists piece together the ancient climate of Mars by revealing how much rainfall and snowmelt filled its lake beds and river valleys 3.5 billion to 4 billion years ago.

The study, published in Geology, represents the first time that researchers have quantified the precipitation that must have been present across the planet, and it comes out as the Mars 2020 Perseverancerover is making its way to the red planet to land in one of the lake beds crucial to this new research.

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