Animals have evolved to sleep in extreme ways — for example, taking micro naps during parenting, sleeping on the wing during ...

You’re gently drifting off to sleep when suddenly your arms and legs convulse and you jolt yourself awake. Or, perhaps you’re relaxing in bed when, out of the blue, your dozing partner does an ...

Scientists already knew that the pair of shallow coastal ocean dwellers keep very different schedules of downtime: The ...

Once I'm out of bed, the first thing I do is neaten up the sheets. When I can't sleep I toss and turn, resulting in bedding ...