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When Dinosaurs Ruled: Not a Bird or a Dinosaur

Related Article: Learn more about dinosaurs.

This segment introduces the flying reptiles known as Pterodactyls.

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T Rex: Dinosaur Posture (1:34)

Enough bones remained of this dinosaur to determine it was a T-Rex.

Challenging T Rex as a Hunter (1:00)

Summer's dinosaur-hunting season. Get a video sneak peak of an expedition with paleontologist Jack Horner.

T Rex: This Dino Was Not a Runner (1:34)

T-Rex was probably a slow runner or even just a walker. No, really -- there's science behind it!

T Rex: Brain Clues (1:09)

The skull of the T-Rex provides important clues to the animal's brain.

T Rex: How Bones are Buried (0:44)

See how ancient fossil evidence was preserved in geologic time.

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Scientific Cliffhangers: Dinosaur Surprise (5:44)

Scientists were surprised to discover a small skeleton of a Sauropod dinosaur. Sauropods were behemoths that typically lived in hot, dry conditions. However, this smaller Sauropod skeleton was found in a humid, plant-rich environment.

When Dinosaurs Ruled: Not a Bird or a Dinosaur (8:35)

This segment introduces the flying reptiles known as Pterodactyls.

When Dinosaurs Ruled: Mammoth Dinosaurs (15:45)

Many large dinosaurs were found in the Cretaceous Period.

When Dinosaurs Ruled: Pangaea's Impact (9:43)

This clip discusses the breakup of Pangaea and the substantial impact it had on dinosaurs.

When Dinosaurs Ruled: Fossils and Evolution (12:12)

The clip discusses how dinosaur fossils give clues to their evolution.

New Dinosaurs: Lasting Impressions (13:03)

This chapter provides an overview of dinosaur footprints.

New Dinosaurs: Vision of a Predator (9:08)

This chapter provides an overview of dinosaur vision.

New Dinosaurs: Analyzing Fossilized Feces (9:26)

This chapter provides an overview of coprolites.

New Dinosaurs: Sounds of a Dinosaur (13:00)

This chapter provides an overview of dinosaur sounds.

Windows Into the Past: Studying Dinosaur Fossils (1:57)

Dinosaur fossils can be excavated and studied to learn more about them. The study of fossils and ancient life is called paleontology.