Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images ...

Sleeping for 7 to 9 hours at night isn't the only way to catch some z's. Here are four alternative sleep cycles -- and they're pretty obscure. Annie Miller Medical Reviewer Annie Miller is a licensed ...

You’ve probably heard the standard advice about getting eight hours of sleep. Maybe you even pride yourself on catching those full eight hours whenever possible—even if that means sleeping until noon ...

Are black women getting enough sleep at night? Adult sleep needs can range from 7 to a whopping 9 hours at night according to the National Sleep Foundation. In the NSF’s 2010 Sleep In America poll ...

Without 8 or 9 hours of sleep, most of us end up staggering around like zombies. But according to a new study, some people have a genetic mutation that makes them feel perfectly alive after sleeping ...