A 2009 study examining the sleep/wake cycles of S. invicta found that the worker ants averaged a mammoth 253 sleep episodes ...

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.

Knowing and adapting to the ideal schedule for your sleep chronotype could improve your rest and help you accomplish daily tasks more efficiently, sleep experts say.

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 ...

Sleep studies have shown that people who share a bed with their dogs tend to wake up more often throughout the night. Dogs cycle between wakefulness and sleep multiple times per hour, which can ...

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 ...

Some animals have evolved the ability to survive with little to no sleep relying on unique adaptations to stay alert hunt or ...