To stay healthy, the body needs its zzz’s. Jcd 201m base microphone manual download. But independent of slumber, human health also appears to require plenty of darkness — especially at night.

Darkness, melatonin may stall breast and prostate cancers. New studies suggest people need to respect the body’s desire for nighttime darkness. Janet Raloff. 6:57pm, January 23, 2009.

Or so suggests a pair of new cancer studies. One found that among postmenopausal women, the lower the overnight production of melatonin — a brain hormone secreted at night, especially during darkness — the higher the incidence of breast cancer. The second study correlated elevated prostate cancer incidence around the world with places that have the brightes.