In the Late Cretaceous, the region of South America that would one day become modern Argentina was a dramatic land indeed.

Paleontologists have discovered a new species of plant-eating dinosaur measuring at 39 feet long. Huashanosaurus qini, ...

Researchers uncovered blood vessels in Scotty, the largest T. rex fossil. High-powered x-rays revealed mineralized tissues ...

Tyrannosaurus subdued prey with raw power, using bone-crushing bite force. But other meat-eating dinosaurs that rivaled T. rex in size used different approaches. Giganotosaurus relied more on slashing ...

Surmising even the physical appearance of a dinosaur - or any extinct animal - based on its fossils is a tricky proposition, with so many uncertainties involved. Assessing a dinosaur's ...

Could T-Rex fossils found long ago be another dinosaur species? Study finds new evidence Researchers claim to have new evidence that fossils found in the 1940s are not of a juvenile T-Rex, but of ...

Despite films like "Jurassic Park" depicting Tyrannosaurus rex as nothing more than a stupid killing machine, Dr. Suzana Herculano-Houzel believes the mighty dinosaur "deserves better." By ...

The strength of the bite of a full-grown T. rex has been the subject of numerous scientific studies, but mysteries endure about what led to this powerful chomp that ruled the end of the dinosaur era.

A dinosaur dubbed one of the "strangest" ever found boasted an elaborate armory of long bony spikes and a tail weapon, ...