Paleontologists say the first new dinosaur fossil found in Madagascar in nearly a decade has helped fill in a big hole in the island country's dinosaur record.
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An ancient "Megapiranha" weighing around 20 pounds delivered a bite with a force more fierce than even the toothy Tyrannosaurus rex, a U.S. researcher says.
U.S. scientists say they can learn a lot about where dinosaurs lived by looking not at their fossilized bones but at the rocks in which the bones were found.
A second full footprint of a Tyrannosaurus rex has been discovered on the remote Philmont Boy Scout Ranch near Cimarron, N.M., a paleontologist said.
A team of researchers led by a North Carolina State University scientist has found soft tissue on a dinosaur skeleton.
U.S. researchers said genetic sequencing of a Tyrannosaurus rex protein shows a common ancestry with chickens, ostriches and alligators.
Chinese and U.S. scientists have reportedly found remains of what might have been primitive crested dinosaurs living 160 million years ago in China.
Ancestors of the mighty predator of the age of dis, the Tyrannosaurus rex, may once have had something close to feathers, a study says.
A Florida researcher has discovered the Tyrannosaurus rex gained 70 percent of its adult weight between the ages of 14 and 18.