DEA agents hunt Colombia's elusive cocaine submarine, that can pack around seven tons of coke as cargo and smuggle it out of Colombia underwater.
From the tropical rainforests of the Amazon to the boreal forests in the far north, experience the greatest variety of forests in the world.
This is the story of the men and women who conceived, built, fixed and operated Hubble - the most celebrated science instrument in history.
Stephen Hawking sets three volunteers a series of challenges to help them answer some big questions about the world.
Motor mogul Afzal Kahn and his R&D department take on the challenge of converting an Aston Martin Vantage V8 into a supercharged, GT inspired racer.
Botswana: Female lion cub. This image is from Storm Cats.National Geographic Channels/Adrian Bailey