When you think of great swimmers, animals like dolphins, fish, or penguins probably come to mind. But the animal kingdom is ...

It long seemed as if African elephants were the champions of the all-nighter. They can get by on about two hours of sleep. Other mammals need much more, like koalas (20 hours) or you (at least seven ...

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, ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Northern elephant ...

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 ...

The world’s attention may be turning its focus to human athletes at the Olympics in Paris, but elephant seal observers are celebrating our own local seal athletes. A new exhibit at the Friends of the ...

How can an air-breathing animal sleep safely in the open ocean, with killer whales and great whites prowling near the surface? For elephant seals, we now know the solution is to dive around 100 metres ...

The African bush elephant holds the world record for the mammal that clocks the fewest hours of sleep per night, dozing off in bursts that together add up to just two hours. But now, scientists have ...

This pink baby elephant's mother stands by his side despite the raging river to help him cross. Victoria Craddock, a guide from MalaMala in South Africa, had the best seats in the house to watch this ...

The Friends of the Elephant Seal Visitor Center exhibit displays the routes three well-traveled seal athletes took and their performance stats. Kathy Curtis Friends of the Elephant Seal The world’s ...