The Curiosity rover discovers opals on Mars with evidence of a watery past

More than just a shimmering stone, garnet – rich in water – has now been found in Mars’ Gale Crater by NASA’s Curiosity Rover.

Martian water ice is abundant in columns But not so much at the equator (where Gale Crater is located). NASA agency Mars Curiosity probewhich is currently exploring the crater, had previously sent back its data DAN (dynamic albedo of neutrons) (Opens in a new tab) spectrometer, which was then analyzed by a team of researchers. In both the old and new Curiosity images, they note fracture halos, rings of light-colored sediments, which stand out because of their color; Further tests established that the lighter rock was in fact opal.

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