Dinosaur bones are like trees—every year is represented by a new ring, and paleontologists can count those concentric circles ...

Tyrannosaurus rex lived longer and took more time to reach its maximum size than previously thought, according to a new study ...

A new study of growth patterns in the bones of Tyrannosaurus rex has contradicted previous reports that it stopped growing in ...

The largest-ever study of how the “king of dinosaurs” grew shows a much longer, slower path to adulthood than scientists ...

For decades, scientists have been counting annual growth rings—similar to tree rings—inside fossilized leg bones of ...

If you've ever seen a cut-down tree, you've noticed the rings that mark each year of growth. But those rings don't just show the tree's age. They show how fast the tree grew. A new study took this ...

CODY, Wyo. — A surge in the number of dinosaur discoveries in recent decades has led to the announcement of species new to science every few weeks. “This mountain of new information has allowed ...

A survey of prehistoric bones reveals that T. rex and some of its cousins had more than one way to reach enormous sizes. Evolution may have preserved that variation in modern animals too.

Video produced in partnership with The Great Courses. All Great Courses video content is available only to subscribers with the password sent via email. Most people can stand under the jawline of a ...

This article was originally published by Quanta Magazine. When the paleontologist Michael D’Emic cut into the bones of Majungasaurus, a distant relative of Tyrannosaurus rex that roamed Madagascar ...

For decades, scientists have been counting annual growth rings—similar to tree rings—inside fossilized leg bones of ...