WASHINGTON (Reuters) - Sleep is a precious commodity for people and across the animal kingdom, indispensable even as its biological purpose remains somewhat mysterious. We spend about a third of our ...

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 ...

Northern elephant seals might be masters of multitasking in the animal kingdom because they’ve learned how to sleep and dive at the same time — all while avoiding predators. The elephant seals can ...

For the first time, scientists have recorded brain activity in a free-ranging, wild marine mammal, revealing the sleep habits of elephant seals during the months they spend at sea. The new findings ...

A biologist at Scripps Institution of Oceanography has found that elephant seals take multiple 10-minute naps during their nearly 10-month foraging trips out to sea. Like us, elephant seals need to ...

On land, northern elephant seals laze around, sleeping up to 14 hours a day. But when the seals take off on seven-month foraging trips in the ocean, their sleep habits take an extreme turn. Scientists ...

How would you be able to sleep if you were surrounded by predators who might eat you as soon as you nodded off? Well, a new study shows that elephant seals manage it by only sleeping two hours a day, ...