Editor’s note: This is the final installment of the series The Longevity Project, a collaboration between The Aspen Times and the Glenwood Springs Post Independent. Sleep is important for everybody; ...

Americans, by and large, are starved for sleep. While seven to nine hours of sleep a night is generally recommended, a survey by US News revealed 58% of us sleep six to seven hours a night, while one ...

Add Yahoo as a preferred source to see more of our stories on Google. For as long as Seemay Chou can remember, she has gone to bed at midnight and woken around 4:30 a.m. Chou long assumed that meant ...

In 2009, Ying-Hui Fu started getting a flood of emails from people who claimed to only need a few hours of sleep at night. Fu and her colleague and spouse Louis Ptáček, both at the University of ...

Restorative sleep happens during deep sleep and rapid eye movement (REM) sleep. Deep sleep repairs tissue and strengthens immunity, while REM supports learning and memory. Nonrestorative sleep means ...