There is no question that Tyrannosaurus rex got big. In fact, this fearsome dinosaur may have been Earth's most massive land ...

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

Fossils reveal dinosaurs were flourishing in diverse ecosystems right up until the asteroid impact ended their reign.

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

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

A landmark investigation into Tyrannosaurus rex fossils has fundamentally altered scientific understanding of how long these ...

Layers of rock can tell the story of life on Earth, but only if you know when each chapter was written. For many dinosaur sites, that date has been little more than a rough guess. Now, a team of ...