Watch Scientists Blast a Fake Asteroid into a Fake Earth

Watch Scientists Blast a Fake Asteroid into a Fake Earth  Live Science NASA's High-Speed Cannon Used to Explore the Origins of Water on Earth  Popular Mechanics Scientists shot rocks out of a cannon to prove asteroids might have brought water to the early Earth  BGR Bam! Cannon Experiment Shows How Asteroids Delivered Water to Earth  Space.comFull coverage

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