Every year, thousands of Antarctica's emperor penguins make an astonishing journey to breed their young. They walk, marching day and night in single file 70 miles into the darkest, driest and coldest continent on Earth. This amazing, true-life tale is touched with humour and alive with thrills. Breathtaking photography captures the tr...

A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwide.

BBC The Natural World. In 2004, a team from the Planet Earth series captured the first ever film of a wild snow leopard in the mountains of Pakistan. For Nisar Malik, who led the expedition, these images sparked a passion that compelled him to return. With cameraman Mark Smith, he spent two years documenting the snow leopard's daily l...

Gibbons are highly intelligent, agile and acrobatic tree-dwelling apes, found in the tropical forests of Asia. Most of the gibbon species are highly endangered and are on the verge of extinction as a result of the destruction of their tropical rain forest habitat as well as being hunted for food.