Episodes

In the extreme conditions of Alaska’s great Iditarod sled dog race, almost no factor is more important than the relationship forged between the mushers and their dogs. Their extraordinary bond can mean more than win or lose – it can mean life or death.

They gallop and trot, whinny and neigh, capturing our imagination -- and our hearts. Indeed, horses are said to have done more to change human history than any other domestic animal, once upon a time carrying explorers to new frontiers and mighty armies to great conquests.

This program doesn't just talk with an ape, it carries on an intimate, decades-long dialogue with her.

NATURE uproots the cunning secrets of how flora reproduce.

Though cats appear aloof to the uninitiated, individual owners tell stories revealing that cats are capable of amazing acts of courage, stamina, resourcefulness, and loyalty.

Jutting into the North Pacific from Siberia, Kamchatka is a rugged peninsula of volcanic craters and steep valleys. While its impenetrability once made Kamchatka the perfect home of a notorious Soviet prison camp, its isolation also has kept it a haven for one of Earth's last giants, the grizzly bear.

Take an inspiring look at the real spirits -- both human and wild -- that thrive in a challenging land where fire literally meets ice.

Uncover the variety of activity, both human and natural, that occurs on the slopes of active volcanoes. See the surprising number of animals that survive and thrive alongside these fiery natural phenomena

Defying all conventional labels, John Denver held a singular place in American music: a songwriter whose immensely popular work was suffused with a deep and abiding kinship with the natural world.

This film tells the sad story of how the buffalo nation was destroyed nearly a century ago by greed and uncontrolled hunting -- and how a few visionaries are working today to rebuild the once-great bison herds.

Woldwide, there are more than 370 species of sharks, which vary greatly in size, shape, preferred habitat, and prey. This film explores their worlds and those of their close cousins, the rays.

The polar bear rules the north. To the hardy native people who settled the harsh lands of the Arctic, the powerful hunter with the ghostly white coat is known as the "lonely roamer." But most of us know the huge mammal as the polar bear.

For centuries, these seemingly larger-than-life birds have fascinated and inspired us.

Here, the extraordinary lurks just beyond the ordinary -- from amorous snails and hedgehogs to ravenous slug-eating beetles, choking creeping vines, and courageous mother bugs.

This film, which took two years to create, is a vivid portrait of life -- and death -- in the tide pools and bays along Canada's rugged Pacific coast.