Dinosaurs had to hunt by day, and so many mammals chose to live largely nocturnal ... The difficulty of seeing in the dark has led some nocturnal animals to rely on sound. The large ears of ...

The most well-known, perhaps, is the aptly named lantern shark. This small animal lurks in the deep dark sea, deploying the ...

Swell sharks glow in the dark, but these animals have another impressive trick that's how they got their name.

From elephants to orcas, the animal kingdom has a good share of marathon agers. In the animal world, bigger animals often live longer ... In its dark, watery home, the olm takes nearly 16 years ...

This is only the second time the species has been recorded while alive. “I thought it was A.I.,” says fish biologist Kory Evans.

These dark spaces are sheltered from the weather and provide a steady temperature, making them ideal homes for an enormous diversity of life. Animals that are adapted to live in caves are known as ...

There are some animals that only come out ... Owls have big eyes to help them see in the dark. This white owl is called a barn owl because she likes to live in barns and sheds.

Some of the planet's bioluminescent animals live in the deep ocean (although not all of them). Many exist in the twilight zone, the part of the ocean from 500 to 1,000 metres deep, which is always ...