Life
Icy moon explorer gets an Alaska road test
Camped on a glacier, Lisa Grossman meets a robot that could pierce the ice of Jupiter's moon Europa and check its hidden ocean for signs of life
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Camped on a glacier, Lisa Grossman meets a robot that could pierce the ice of Jupiter's moon Europa and check its hidden ocean for signs of life
Earth held on to a part of its past 鈥� a layer of rock seems to have resisted the catastrophic melting caused by the collision that spawned the moon