Oct 10, 2013 — A study shows that genes that help our skin withstand damage from ultraviolet light kick in during the day. At night, our skin focuses instead on regenerating cells that were damaged during the day. This built-in system helps protect us from premature aging and skin cancer.
May 15, 2012 — The disconnect between our social calendars and our biological clocks is creating "social jet lag," according to key researchers. And that's taking a toll on our weight because the body stores fat when it's not getting enough sleep.