Night lights may foster cancer

By Janet Raloff, 15:58 PM April 15, 2008

Although our bodies evolved to work while the sun shines and to rest at night, people in today's 24/7 society sleep, work, and play with little regard for solar cycles. This flaunting dominion over darkness may come at a cost, however—a heightened risk of cancer.

Two dozen scientists from 10 countries met in Lyon, France under the aegis of the International Agency for Research on Cancer, last fall to review human and animal data on health risks from exposures to light at night. The scientists...

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