Defines what mammals are and examines the characteristics and behavior of various primates, sea mammals, ungulates, rodents, marsupials, etc.

This video explores the complex loving relationship between cats and humans and provides insight into the behavior of cats, which is never far removed from that of their cousins in the wild.

Venture into the dense forests of coastal Siberia to track the biggest cat on earth, the elusive Siberian tiger.

Discusses the physical characteristics of fish and examines different kinds, including sharks, eels, and catfish.

In the spring of 1805, Captains Meriwether Lewis and William Clark, with a small band of men and a Shoshone woman, set out on a journey. Written by the explorers themselves, these journals remain the most vivid depiction of their epic trek.

Dr. Robert Ballard leads a team of experts and four World War II veterans to Midway Island where the U.S. and Japan fought one of the fiercest battles of the war. They're in a race against time to find at least one of the downed aircraft carriers including the U.S.S. Yorktown.

National Geographic remembers the 100th anniversary of the sinking of the Titanic with a special collection of programs including the original classic "Secrets of the Titanic" and the new special "Save the Titanic with Robert Ballard".