NASA’s unmanned Curiosity rover has found the most direct evidence to date that ancient Mars once had running water. The robot explorer discovered rock outcroppings thrusting from the Martian surface that are the remains of an ancient stream bed consisting of water-worn gravel that was washed down from the rim of Gale Crater where the nuclear-powered rover landed. This means that Mars was once a much wetter place and increases the chances that it once harbored life ... or still does... Continue Reading
Curiosity finds ancient stream bed on Mars
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