Tyrannosaurus rex is often seen as the unstoppable king of the dinosaurs, but life in the Hell Creek ecosystem was far from easy. Massive herbivores like Triceratops, heavily armored Ankylosaurus, and ...

Tyrannosaurus rex was a late developer who kept growing until the age of 40, reveals new research. The largest-ever study of how the “king of dinosaurs” grew shows a much longer, slower path to ...

Tyrannosaurus rex may have taken far longer to grow up than scientists once thought. By analyzing growth rings in fossilized leg bones from 17 tyrannosaur specimens and using new statistical methods, ...

The largest-ever study of how Tyrannosaurus rex grew shows a much longer, slower path to adulthood than scientists previously thought. For decades, scientists have been counting annual growth ...