Dinosaurs are extinguished by an asteroid in prehistoric Idaho.

Dinosaurs thrived during springtime when ferns and evergreens reappeared in the polar forest.

With wings longer than those of a small plane, pterosaurs were the largest creatures ever known to have flown.

Large marine reptiles command the seas during the late Jurassic period.

The Jurassic period saw the advent of the largest and strongest dinosaurs that ever roamed the Earth.

The life of the first reptilian carnivores on Earth, told through computer animation.

Using a unique blend of natural history stories and computer graphics to recreate an extinct world.

Dinosaur tales are told using fossil evidence and computer graphics.

Prehistoric nature documentary presented by Nigel Marven.

The evolution of the dinosaurs.

Preschoolers get to hop on board the "Dinosaur Train" to learn about natural science, natural history and paleontology. Each half-hour episode of this series, produced in CGI-animated format by the Jim Henson Company, features Buddy, a preschool-aged Tyrannosaurus Rex, and his adoptive Pteranodon family traveling on a special train to meet all kinds of dinosaurs and explore the world inhabited by these amazing creatures. Also included are live-action segments hosted by paleontologist Scott Sampson.

The planet is teeming with myriad life forms, both plant and animal, all interlocked in a struggle for survival. As time goes on, some living things are forced to adapt and change to survive. This series chronicles some of the most unusual, if not downright bizarre, behaviors that living organisms have devised to keep their species alive. The 11-episode series was four years in the making, taking camera crews to every continent and habitat.

The planet and its wildlife.

Dazzling, state-of-the-art high-definition imagery highlights this breathtaking documentary series featuring footage of some of the world's most awe-inspiring natural wonders -- from the oceans to the deserts to the polar ice caps. Actress Sigourney Weaver narrates this American version of the original BBC production.