Link found between light, breast cancer

By MARTIN MITTELSTAEDT
Saturday, January 14, 2006 Posted at 2:13 AM EST
From Saturday's Globe and Mail

The high rate of breast cancer in industrialized countries has long puzzled medical researchers, but a team of U.S. scientists has discovered a possible explanation for why women in developed countries are at high risk of developing the disease.

The answer at first glance may seem unlikely: nighttime exposure to electric lighting.
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