The Pokémon Sleep app that’s just been released in the United States not only tries to track the length and quality of sleep, it also can also track and record the various sounds that you make. (Photo ...

Elephant seals drift downwards in a "sleep spiral" when deep diving in the ocean, a new study found. Sleeping while deep diving allows the seals to avoid predators, scientists believe. The scientists ...

Just when we all thought baby elephants couldn't possibly get any cuter than they already are, it turns out, they can. Wildlife Rescuers posted an adorable video to TikTok of a baby elephant sleeping, ...

Northern elephant seals are the true masters of the power nap. On long trips out to sea, the seals snooze less than 20 minutes at a time, researchers report in the April 21 Science. The animals ...