Extraordinary Animals: Bodies

Hugh Fearnley-Whittingstall and a team of wildlife experts explore creatures' surprising physical characteristics, including how one man's understanding of an eagle's physical abilities could help save it from extinction. Conservationist Giles Clark witnesses an Australian kangaroo that is more at home climbing trees than hopping through the Outback, zoologist Lucy Cooke is in Costa Rica to find out if the sloth's laziness is the key to its success, and marine biologist Patrick Aryee reveals the secrets of one of the world's oddest looking creatures - the platypus