Ever wondered how some animals manage to survive without the luxury of a good night's rest while we humans desperately need our eight hours? The animal kingdom is packed with creatures that seem to ...

Sleep is supposed to be the ultimate vulnerability. You shut down, your reactions slow, and the world keeps moving without you. For decades, sleep scientists have treated long, regular bouts of sleep ...

What has puzzled researchers and philosophers for many centuries is the ‘why’ of sleep, along with the ‘how’. We human animals know from experience that we need to sleep, and that the longer we go ...

Group sleeping can impact when animals sleep, how long they sleep for, and how deeply they sleep. For example, groups of meerkats time their sleep according to 'sleep traditions'; olive baboons sleep ...

Turns out that lying down to catch some Zs is not universal. Some animals skip the whole “horizontal nap” deal and snooze upright like it's no big deal. It's a quirky, gravity-defying habit that makes ...

Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and even jellyfish sleep. Sleep is universal “even though it’s actually very ...

While humans need several hours of sleep to function, many animals get by on very little rest. Some animals take short naps, while others stay partly awake to remain alert. These unique sleep habits ...

A groundbreaking new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions of years ago in jellyfish and sea anemones, among the earliest creatures ...

Nature is full of surprises with animal abilities that seem impossible. From koalas with human-like fingerprints to ...

You’ve probably heard about early birds and night owls. Both are references to sleep chronotypes, or the body’s natural inclination to be awake or asleep at certain times. “Your chronotype is driven ...