Nearly a dozen years since the wolves returned to Yellowstone, the recovery of that system to its natural balance is well underway.

Save the Chimps bid a sad farewell on Thursday, July 7, to one of our elder statesmen, Lou.

Award-winning wildlife cinematographer Bob Landis discusses the making of the film.

A lone black wolf covets the daughter of the powerful patriarch of the Druid wolf pack.

Jellies live in virtually every part of the ocean and come in a dizzying array of shapes, sizes, and colors. Some, like the aquarium's box jellies, are no bigger than a thimble.

The natural world has lost one of its most preeminent figures this week as Titus, known as the Gorilla King, succumbed to old age and died on September 14, 2009.

Displaying a great white has long been a dream of aquariums around the world. But previous efforts to care for the sharks have largely ended in failure.

Among the mountain gorillas of Rwanda, Titus reigns as king. Watch the full episode online.

NATURE producer Jill Clarke gives an update on the leadership shakeup in Titus's gorilla family.

While his prolific mating is a clear sign of the king's success, this unique gorilla's extensive family tree grew out of tragic circumstances.