Why on Earth

Theodore Roosevelt was America's 26th president and a larger-than-life legend whose incredible story must be seen to be believed. Narrated by George...

Wildlife photographer Richard Sidey joins an international team of whale research scientists in Antarctica to document their work on how Humpback...

We follow a team of scientists on a gruelling expedition into a remote rainforest in Mozambique. They're hoping to prove that Mount Mabu's animals...

April 8, 2003: Karsten Heuer + Leanne Allison left the remote community of Old Crow,Yukon, to join the Porcupine Caribou Herd on their epic life...

The Balkans cradles Europe's last wild rivers and supports abundant wildlife and healthy, intact ecosystems. These rivers are "The Undamaged" –...

First Nations fight to end grizzly bear trophy hunting in the Great Bear Rainforest in British Columbia. The Heiltsuk, Kitasoo Xai'xais and Gitga'at...

In 2009, the underwater world around the Central Polynesian Sporades in the eastern Pacific was intact. But a few years later, the corals died...

Bird watchers on both sides of the U.S.-Mexico border share their enthusiasm for protecting and preserving some of the world's most beautiful species.

For 20-year-old Madison Stewart, nothing feels safer or more natural than diving straight into shark-infested waters. Since childhood, growing up by...

Florida is home to beaches, coral reefs, pine forests and the famous Everglades wetland, but a growing human population and abandoned exotic pets...

From the moment David Brower first laid eyes on the beauty of the Yosemite Valley, he wanted to the fight to preserve the American wilderness for...