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Curiosity closing in on Mars’ transition from wet to dry

9 Oct 2019, 16:01 UTC
Curiosity closing in on Mars’ transition from wet to dry Kevin Gill / flickr

Some 3.5 billion years ago, ponds fed by streams in the walls of Gale Crater likely went through cycles as the waterways flowed, dried up and then flowed again over millions of years during the planet’s transition from a warmer, wetter world to the frozen desert seen today.

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