Sir David Attenborough is set to explore how dinosaurs came to be extinct in a new BBC documentary.
The veteran broadcaster and naturalist will look at some of the fossil finds from a new dig site at a secret, prehistoric graveyard hidden in the low hills of North Dakota, known as Tanis, for the one-off film Dinosaurs: The Final Day, with David Attenborough.
The fossilised creatures at the site, dating from the very end of the Late Cretaceous period and buried in a crumbly layer of rock, are preserved in such detail that they could help offer a clearer picture of the time just before an asteroid wiped out the dinosaurs than ever before.
