Scientists have discovered the massive creatures — so named because the males sport a distinctive trunk-like nose — are often getting less shut-eye than most others in the animal kingdom.

There are some animals that have a reputation for taking naptime to the extreme. Whether they are slow to digest food, are keen on avoiding predators, or simply want to conserve their energy ...

“But if something dangerous is happening, your brain says, ‘No, no, no, no. It’s not time to go to sleep. I don’t care how tired you are.’ The neurons that regulate sleep can tell the difference ...

Scientists have learned that northern elephant seals — massive creatures found along the Pacific Coast of North America — cobble together a... Think you're tired? This animal goes for months ...