Video duration: 311 seconds
Global video hits: 38741/div
The blue whale, the largest creature that has ever existed, subsists by eating one of the smallest - krill. Attenborough investigates a computer-animated blue whale skeleton to illustrate its immense size and body functions, then catches a glimpse of the elusive creature in the open ocean.
Video duration: 244 seconds
Global video hits: 24954/div
Video: Planet Earth Trailer produced by Alastair Fothergill and narrated by David Attenborough.
Earth Photo: The Blue Marble seen from Apollo 17.
Song: Sigur Rós - Hoppípolla