sleep

Not good things, to our dismay.

Here's yet another reason to make a good night's sleep a priority: You're missing a potentially vital opportunity to practice essential survival skills.

D'awwww.

A small study of young couples found that people who got a little extra sleep were happier with their relationships the next day.

Birds fly across oceans for days at a time while migrating. But they still manage to get some shut-eye.

Why not make it an even 10?

Infants need up to 16 hours of sleep a day.

Sophisticated laser scans of trees at night showed the trees’ branches drooping after dark and perking up around dawn.

How do the positions in which we sleep affect our overall health?

What Would Happen to Your Body If You Stayed in Bed Forever?

Go to Sleep: Your Dreams May Help You Prepare for Disaster

Baby Monkeys Are the Most Smiley Sleepers Around

Dissatisfied With Your Marriage? Sleep On It

Can Birds Sleep Mid-Flight? Yes, a New Study Confirms

Why Does the Snooze Button Only Give You 9 More Minutes of Sleep?

Here’s How Much Kids Should Sleep

Trees 'Sleep' at Night Too, Study Finds

8 Tips for Finding the Best Sleep Position for Your Health