Scientists announced Tuesday the discovery of a new dinosaur in Patagonia, Argentina, with a crocodile bone in its jaw.

The new dinosaur, named Joaquinraptor casali, was about 23 feet (7 meters) long and weighed over 2,200 pounds.

Scientists in Argentina have unearthed a new dinosaur species, Joaquinraptor casali, believed to be a more powerful predator than the Tyrannosaurus.

In a fossil bed dating back 68 million years, scientists discovered the remains of a new species of megaraptor — a lithe, ...

Large aquatic lizards once populated the Earth’s oceans—and you can find their fossils in suburban New Jersey.

Speedy megaraptor Joaquinraptor casali had big arms and claws like hedge trimmers that would have made T. rex's forelimbs look puny.

Rock layers deposited before and after the major dinosaur extinction event 65 million years ago are surprisingly different.

Using uranium-lead dating, researchers calculated the age of the eggs, rather than the sediments around them, at the ...

After years of searching worldwide, paleontologist Kenneth Lacovara found the extinction layer—and thousands of fossils—just ...

Researchers dated dinosaur eggs directly for the first time, placing them at 85 million years old. The findings link climate ...

Dinosaurs' extinction "re-engineered" Earth's surface, according to new research. The reptiles had such an "immense" impact ...