Being a puppy can be tiring, so this precious pup is recharging by taking a nap in its owner's jacket. But how much sleep do puppies need?

Do elephants and hippos get along? Watch what happens when a herd of elephants encounters a sleeping group of hippos.

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 ...

For most of us, getting less than seven hours of sleep translates into grogginess, sluggish thinking, and an overwhelming ...

Dogs may look adorable when they snooze, but their sleeping habits actually hold fascinating clues on how living with humans ...

Daylight savings time might leave some people feeling a little groggy. But at Utah’s Hogle Zoo, animals have their own unique sleep schedules and ...

It was a day of love and compassion indeed, a rare but commendable move by a city government office! Fourteen surrendered and caught dogs and cats were ...

MB: Whom do you hope to reach? RP: I begin the book with a discussion of the evolution of sleep in the animal kingdom and its benefits, focusing of course on birds and the complexity of their lives.

Sleep is as important to humans as food and water, but it is often sacrificed to work, especially for farm workers. Dairy farming, in particular, can involve long hours and substantial physical ...