White bears on an island of British Columbia learn survival by trial and error.

How the change in international relations may affect Cuba, the largest island in the Caribbean, whose protected habitat features wildlife found nowhere else in the world.

Meet the pangolin, an almost unheard-of creature, yet the most trafficked animal in the world.

Once facing extinction, Asia's last wild lions live dangerously close to India's villagers.

This long-running, award-winning documentary series focuses on science, its many applications, speculation, history and researchers. Inspired by the BBC documentary program "Horizons, " the U.S. series frequently features interviews with scientists directly involved in the topic at hand, and sometimes even boasts footage of a particular discovery.

Uncovering how similar humans really are to animals using a new generation of spy cameras.

This award-winning series presents compelling untold stories and covers a wide array of provocative subjects. "Explorer" aired for 25 years -- the longest-running documentary series in cable TV history -- before being relaunched in 2015 after a five-year hiatus. Each monthly episode of the new "Explorer" takes a similar deep dive inside a story from the pages of a recent National Geographic magazine issue, taking viewers not only to the most remote corners of the globe but also to the furthest reaches of the mind and deepest crevices of history -- on urgent missions of discovery.

"American Experience" combines dramatic re-enactments with commentary by historians and authors to present an absorbing look at the personalities, events and resources that have had a profound impact on the shaping of America's past and present. Many of the program's documentaries have received major honors in the broadcasting community, including Emmy, Peabodys and duPont-Columbia University awards.

"Frontline" offers an unflinching and compelling look at complex, vital and often-controversial subjects. Each broadcast consists of a long-form news documentary. Topics run the gamut -- from Bernie Madoff's intricate fraud and prisoner abuse at Abu Ghraib, to AIDs, racial issues and Wal-Mart's effect on the U.S. economy.

Madagascar is a land just off the coast of Africa that is full of misty mountains, tropical rainforests and spiny desert scrub. It is also home to strange wildlife, much of which is not found elsewhere on Earth. This documentary series, from the BBC's Natural History Unit, showcases the island's diverse and rare wildlife, some of it being filmed for the first time. Among the animals featured on "Madagascar" are lemurs, frogs that change color from brown to yellow, wasps that pluck tadpoles from trees and fish that swim upside down. David Attenborough narrates the three-part series.