Max Genecov is a doctoral candidate in clinical psychology at the University of Pennsylvania, a dad, and a stuffed animal owner. “I’ve always had them growing up, I had a big fantasy life with them ...

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 ...

Sleeping for only a few minutes at a time? While this might sound like torture to humans, it's no problem for some animals.

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 ...

Frigatebirds can remain airborne for days at a time without landing. Here’s how they rest while flying, according to biological research.

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 ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Max Genecov is a doctoral candidate in ...