What happens underground when a missile hits?

April 12, 2015 3:58 AM

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When a meteor strikes the earth, the havoc above ground is obvious, but the details of what happens below ground are harder to see. Duke University physicists have developed techniques that enable them to simulate high-speed impacts in artificial soil and sand in the lab, and then watch what happens underground close-up, in super slow motion.

They report that materials like soil and sand actually get stronger when they are struck harder.

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