Dinosaur DNA may still be out of reach, but scientists are uncovering something almost as exciting—ancient blood vessels ...

Scientists found preserved blood vessel structures in a T. rex fossil, offering new insight into dinosaur healing and fossilization.

A groundbreaking study of Tyrannosaurus rex fossils has rewritten what humans know about these prehistoric predators and how long they lived millions of years ago. A study by three US researchers ...

Fossils found in New Mexico belong to a previously undiscovered species of small tyrannosauroids that lived 92 million years ago, cousins of the much larger Tyrannosaurus rex. They shed light on how ...

ALBUQUERQUE, N.M. — Scientists identified a fossil from New Mexico as belonging to a dinosaur that may have been an ancestor of the Tyrannosaurus Rex. The research shows large tyrannosaurs lived in ...

Billions of Tyrannosaurus rex roamed North America during their fascinating reign as top predators, according to a team of researchers that went about the daunting task of making the calculation.

A group of researchers has estimated how long it took tyrannosaurus rex to reach its full size — and the time period is significantly longer than scientists previously believed. The dinosaur is ...

Add Yahoo as a preferred source to see more of our stories on Google. Tyrannosaurus rex is known as the king of the dinosaurs. - Roger Harris/Science Photo Library RF/Getty Images Tyrannosaurus rex ...

Tyrannosaurus rex lived longer and took more time to reach its maximum size than previously thought, according to a new study. Scientists have long counted annual growth rings in fossilized ...