Paleontology may be entering another great era of discovery: characterized by serial misidentification in decades past.

Paleontologists have identified the closest-known ancestor to giant T. rex among fossils originally unearthed in Mongolia in the 1970s. Meet Khankhuuluu mongoliensis, a newly identified early ...

A reexamination of fossils found in Mongolia has revealed a previously unknown “missing link” species that led to dinosaurs like Tyrannosaurus rex.

While Tarbosaurus, an ancestor of T. rex, clocked in at between 3,000 and 6,000 kilograms (6,613 pounds and 13,227 pounds), the fleet-footed Khankhuuluu mongoliensis likely weighed only around 750 ...

Scientists have discovered a new species of tyrannosauroid—the group of dinosaurs that includes Tyrannosaurus rex. The finding offers new insights into how massive predators like T. rex evolved, ...