VIDEOS

Megalodon was the biggest predator ever to swim the oceans who ruled the seas for 20 million years.

Meet the ugliest creatures ever to have lived!

As day breaks, everything seems normal. But the bears wake to good news. Salmon numbers in the lake have reached a critical...

In the far South West lies the Caucasus. A compact region filled with a bounty of wildlife. The great divide between Europe...

Polar bears spend much of the year out on the solid ice, but when the white land cracks, it’s time to move on. Their latin...

The Arctic fox can tolerate temperatures down to minus seventy degrees Celsius by shunting blood flow away from its legs to...

Leading the expedition is Dr. Enric Sala, a National Geographic Explorer and research scientist at Spain’s National Council.

Find out the dangerous work of undercover agents specialized in the investigation eco-crime.

Observe the fierce struggle between these peculiar reptiles, and discover why they fight!

Find out why predatory conflict isn't limited to battles between different species.

Red crab larvae hatch and head for dry land, covering Christmas Island's shores in delicate little crablings.

While searching for elephants, cameraman Bob Poole and his crew are encased in a massive dust storm.

A cameraman makes a special hide to get up close to birds.

Martin Dohrn explains the Frankencam -- the handmade apparatus used to film army ants in extraordinary ways.