Mars swung between humid and arid conditions before it dried up

Mount Sharp on the Martian surface


Ancient Mars fluctuated between arid and humid periods, before taking on its current dry state.

This conclusion comes from the study of high-resolution images captured by a telescope on the Curiosity rover, which landed on Mars in 2012. The images reveal details of the geology of Mount Sharp, a 6-kilometre-high mountain at the centre of Gale crater.


“It’s kind of the first time that we have details on…

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