Mars had ponds & rivers, now it’s turning dry. Study explains unusual reasons - The Federal

Study raises the theory that Mars had a thin atmosphere throughout its river-forming era, and became uninhabitable as the result of constant-pressure cooling

Mars once had rivers and ponds but the water evaporated about three billion years ago. Nobody knows why this happened and a new study by University of Chicago scientists has provided unusual answers … [+3669 chars]

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