Extras
David Attenborough comes face-to-face with a dodo, the first animal driven to extinction by humans.
Sir David Attenborough befriends a giant dinosaur, the Diplodocus.
Sir David Attenborough explores the research surrounding the existence of Bigfoot.
The team films something not seen before: a teaching session between adults and their young.
Killer whales rarely risk hunting leopard seals - Antarctica's second-top predator.
Marine biologist Callie Veelenturf uses her research on endangered sea turtles to help protect them.
This is the first time pack-ice killer whale vocalizations have been recorded.
Filmmakers discuss their experiences living on location with Africa's three big cat families.