2/4 Cameras in space reveal the stories behind Earth’s most remarkable patterns and shapes.
2/2 The salmon run arrives in Alaska, and Parsnip and Pushki return to the bay to feed.
One-off special looking at seven diverse natural wonders of the Commonwealth.
4/6 A look at the sardine run, which happens each winter along the South African coast.
Chris Bavin reveals the latest scientific research on obesity.
A team heads to Egypt in an attempt to uncover lost cities beneath the sands.
David Attenborough investigates the remarkable real life story of Jumbo the elephant.
An international team of scientists is trying to change perceptions of sharks.
4/4 In the final programme of the series, we find out what the future holds for marine life.
3/3 Dolphins and whales are nature's supreme vocalists, with a vast repertoire.