Ever wonder how animals sleep in the wild? It's not always as you may think. From sloths who hang upside down from trees to ...

Prairie voles are among the few mammals that form long-term pair bonds. They frequently cuddle and sleep side by side, ...

This is read by an automated voice. Please report any issues or inconsistencies here. Animals such as penguins and frigatebirds have evolved extreme sleep strategies — naps that last a few seconds, ...

It’s that time of year again: PEOPLE magazine is on the search for the World’s Cutest Dog. The magazine has partnered with Pedigree for the eighth year in a row. Entries are open most of the month, ...

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 ...