Data from mice subjected to constant illumination suggest that artificial light may increase risks of lung and liver cancers and leukemia.
Exposure to light at night reduces production of melatonin, a hormone that calibrates the body’s biological clock and its secretion of estrogen (SN: 10/17/98, p. 248: http://new.sciencenews.org/pages/sn_arc98/10_17_98/19981017fob.asp).
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.