Some animals spend most of their lives sleeping, using extended rest to conserve energy, avoid predators, or adapt to their environment. Unlike humans, who need sleep for cognitive function, these ...

January often feels like a month when we should be hibernating, emulating a dormouse or a hedgehog and tucking ourselves up ...

What has puzzled researchers and philosophers for many centuries is the ‘why’ of sleep, along with the ‘how’. We human ...

From a blue whale to a pet hamster, the sleeping patterns of the animal kingdom can be just as diverse as the species themselves. While humans may be accustomed to a certain number of snoozing ...

The Secret World of Animal Sleep: Asleep on the Wing When birds need sleep, they do it on the fly--quite literally. They're able to enter a special kind of half-sleep state that lets them rest ...

Each of these companies assigns an animal whose sleep patterns loosely resemble the wearer's: Google's Fitbit has giraffes, dolphins, and parrots; Samsung compares wearers to lions, penguins ...

Are you the type who thrives at dawn or do you come alive under the moonlight? Your natural sleep patterns and habits reveal fascinating clues about how you manage energy and navigate the day.

Each person's rhythm, or chronotype, is different. According to psychologist and sleep specialist Dr. Michael Breus, there are four chronotypes, which he labels dolphins, lions, bears, and wolves.

torn to pieces by these animals, no treatment, no saying give her time to heal…and they want you in all sort of difficult positions. Can you imagine? Sometimes, 20; sometimes, 25 men sleeping ...