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The Boston Globe



Experiment hints at 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 more than 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 lead the Alpha Magnetic Spectrometer project 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 Endeavor.

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