
Nature
Efforts to rescue the thousands of household pets left homeless by Hurricane Katrina.

Efforts to rescue the thousands of household pets left homeless by Hurricane Katrina.

Efforts to rescue the thousands of household pets left homeless by Hurricane Katrina.

Highlights of Hugo van Lawick's 30 years of filming animals on the Serengeti.

Highlights of Hugo van Lawick's 30 years of filming animals on the Serengeti.

A band of young scientists discovers a radical new theory of the natural world.

A band of young scientists discovers a radical new theory of the natural world.

Undisturbed the saguaro cactus can grow to 60 feet, weigh 10 tons and live 150 years.

Undisturbed the saguaro cactus can grow to 60 feet, weigh 10 tons and live 150 years.

How wildlife and animal life survive in a severe landscape with temperatures well above 115 degrees.

How wildlife and animal life survive in a severe landscape with temperatures well above 115 degrees.

Exploring Ireland's wildlife amid its mountains, coastlines, steep gorges and inland waterways.

Exploring Ireland's wildlife amid its mountains, coastlines, steep gorges and inland waterways.

Eagles, pumas, sandhill cranes and other creatures seek sustenance from the Colorado River and its environs.

Eagles, pumas, sandhill cranes and other creatures seek sustenance from the Colorado River and its environs.

The human and natural histories of the Grand Tetons and Jackson Hole, Wyo., interlink.

The human and natural histories of the Grand Tetons and Jackson Hole, Wyo., interlink.

Kilauea, on Hawaii's Big Island, is an active volcano.

Kilauea, on Hawaii's Big Island, is an active volcano.

Kilauea, on Hawaii's Big Island, is an active volcano.

Volcanoes, monstrous waves and whales of Hawaii.