Providing Support for PBS.org

Extras

Video thumbnail: Nature The 500-Pound Dinosaur Heart

Nature

The 500-Pound Dinosaur Heart

The heart of a newly-discovered dinosaur may have weighed as much as a grizzly bear.

The 500-Pound Dinosaur Heart

Video thumbnail: Nature Did This Thighbone Belong to the World's Largest Dinosaur?

Nature

Did This Thighbone Belong to the World's Largest Dinosaur?

David Attenborough examines an enormous dinosaur thighbone.

Did This Thighbone Belong to the World's Largest Dinosaur?

Video thumbnail: Nature Raising the Dinosaur Giant | Preview

Nature

Raising the Dinosaur Giant | Preview

A giant is being awakened after 101 million years of sleep.

Raising the Dinosaur Giant | Preview

Support for PBS.org provided by: