Scientists find subtle clues ancient Mars had rainy days, too

Apr 24 2025 by Mashable

 

For the past four years, NASA's Perseverance rover has rambled over a region of Mars where scientists say a strong river once emptied into a crater, creating a large delta. 

But for that to have happened, a lot of water would have gushed — something difficult to explain if the Red Planet were always frozen.

Computer simulations show that ancient Mars likely experienced regular rain and snow, which helped shape vast networks of river valleys and lakes. The distribution of these land features...

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