The 23-foot "megaraptoran" was discovered in the Lago Caolhue Huapi rock formation in Patagonia, Argentina, and is believed to have been an "apex predator" ...

In a new study, researchers said they uncovered part of a skull as well as arm, leg and tail bones from the Lago Colhué Huapi ...

A fossil from the blustery plains of Patagonia is revising your book on one of the most elusive bands of hunting dinosaurs.

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

Scientists in Argentina have unearthed a new megaraptoran dinosaur species, Joaquinraptor casali, distinguished by its ...

Paleontologists have discovered a new species of dinosaur that was related to the infamous Tyrannosaurus rex. The dino fossils, two partial skeletons found in Gobi Desert in Mongolia in the 1970s, ...

A gigantic dinosaur species was discovered by an international team of paleontologists in Argentina, according to a study published this week. Dubbed Meraxes gigas, the 9,000-pound, 36- to ...

When you think of the largest carnivorous dinosaurs, you might picture a massive predator biting through bone in one devastating snap. That image fits Tyrannosaurus rex, but new research shows it ...

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 new study suggests that predatory dinosaurs, such as Tyrannosaurus rex, did not have permanently exposed teeth as depicted in films such as Jurassic Park, but instead had scaly, lizard-like lips ...

The largest predatory dinosaur to ever walk on Earth sported a massive sail that rose from its back, but it turns out this imposing creature would have made for a very slow and awkward swimmer, ...