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The Boston Globe

Science

Experiment believed to detect evidence of dark matter

A space-based experiment nearly two decades in the making — led by Nobel laureate and MIT physicist Samuel C.C. Ting — has detected tantalizing, though preliminary, evidence of a signal that might be caused by dark matter, the long-sought, mysterious substance that makes up about a quarter of the universe.

The announcement Wednesday in Switzerland, inconclusive though it is, was a major victory for Ting, who many credit with having the sheer force of will to push the Alpha Magnetic Spectrometer project forward through uncertain times. The 7.5-ton, $2 billion instrument was carried to the international space station in 2011 aboard the last flight of space shuttle Endeavour.

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