Age, gender and nationality affect how much sleep you get, study finds
Friday, May 6, 2016 - 13:30
in Psychology & Sociology
What constitutes a "normal" night's sleep? That all depends, says Danny Forger, a biological mathematician at the University of Michigan and an expert in circadian clocks. "People set guidelines all the time -- you need eight hours, you need seven hours -- but we've found that 'normal' sleep varies...