4.1-Billion-Year-Old Mars Rock Found in Sahara Desert
A rose-coloured rock found in the Sahara Desert in 2022 has turned out to be a 4.1-billion-year-old piece of Mars. Its age and origin make it a key clue that could help unlock the secret history of water on Mars.
Context
Mars is cold and dry today, but scientists believe it once had liquid water on its surface. Meteorites, which are rocks that fall to Earth from space, are one of the few ways scientists can study Mars without going there.
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