Curiosity rover discovers opal gems on Mars with clues to aquatic past
More than just a glistening stone, the opal – which is rich in water – has now been discovered in Mars’ Gale Crater by NASA’s Curiosity Rover. Martian water ice is abundant in poles but not so much at the equator (where Gale Crater is). NASA’s Curiosity Mars rover, which is currently exploring the crater, …
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