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Smithsonian Magazine

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Two of the Moon's Grand Canyons Were Formed in Just Ten Violent Minutes, New Study Suggests

Smithsonian Magazine
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86% Informative

Astronomers say a comet or asteroid rammed into the moon 3.8 billion years ago .

Vallis Schrödinger and Vallis Planck are two long channels near the lunar south pole.

They suggest the canyons formed after a 15-mile -long comet hit the lunar surface with 130 times the energy of nuclear weapons.