A Cosmic Quest for Dark Matter

February 14, 2015 10:19 AM

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A Cosmic Quest for Dark Matter

A mile under Italy’s Gran Sasso mountain, scientists are seeking one of the smallest objects in the universe—and one of the biggest prizes in physics: a wimp.

A wimp—a weakly interacting massive particle—is thought to be the stuff of dark matter, an invisible substance that makes up about a quarter of the universe but has never been seen by humans.

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