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

Tyrannosaurus rex, it turns out, may have taken its time becoming king. A new analysis of 17 tyrannosaur fossils suggests the ...

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

An analysis of growth rings in the leg bones of 17 Tyrannosaurus rex individuals reveals that the dinosaurs matured much more ...

An ancient creature is lurking in the ocean. It's double the size of a T.rex. Its gigantic jaws could crush a car. And now, ...

Previous studies of T. rex growth rings concluded they grew until around the age of 25, and then stopped. This was more of a ...