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

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

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

WASHINGTON, Dec 4 (Reuters) - Paleontologists for decades debated whether meat-eating dinosaur Nanotyrannus was actually just a juvenile Tyrannosaurus. But within a span of five weeks, the matter ...

What if everything we know about T. rex growth is wrong? A complete tyrannosaur skeleton has just ended one of paleontology’s longest-running debates – whether Nanotyrannus is a distinct species, or ...