June 29, 2007

Breast Cancer, Out of the Dark

By RICHARD MONASTERSKY

Maverick researchers pursue the idea that lights at night increase the risk of a disease

Richard G. Stevens saw the light one night — and it got him thinking about breast cancer.

While trying to sleep in his apartment in the mid-1980s, Mr. Stevens noticed that the street lamp outside was so bright he could almost read in his bedroom. "You couldn't do that a thousand years ago or even a few hundred years ago," he says. "People just don't experience dark

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