A whole lot of Tyrannosaurus rexes used to rule the planet.
The Tyrannosaurus rex and Triceratops horridus known as the dueling dinosaurs were buried together 67 million years ago on a Montana hillside.
The dinosaur is called “Thanatotheristes degrootorum” and the first word is Greek for “reaper of death.”
People are dressing up as Princess Leia, Spider-Man and ... Tyrannosaurus Deadpool?
"Electrical issue" blamed for loss of 24-foot-tall T. rex.
By Sid Perkins Pound-for-pound, an ancient relative of today's piranhas had a stronger bite than gators, sharks, and even
Image Gallery: Dinosaur Fossils Paleo-Art: Dinosaurs Come to Life in Stunning Illustrations 25 Amazing Ancient Beasts Copyright
This is the first full Tyrannosaurus specimen to go on auction since "Sue," a Tyrannosaurus rex, sold for $8.3 million in
A new study, published in the journal PLoS ONE, has shown that the already fabled carnivorous dinosaur was actually 30 percent