Dinosaurs are often said to have “ruled” the earth throughout their tenure upon it. Yet, as we’ll see, the boxy-headed Herrerasaurus hailed from a time in which dinos were hardly dominant.

This particular story takes place on the west coast of southern Pangea, specifically the region that would one day become the Ischigualasto Formation of Argentina, and concerns an animal that ...

The oldest dinosaurs yet discovered date back nearly 230m years to the Late Triassic epoch. Fossils of Herrerasaurus and Eoraptor were discovered in Argentina; both were bipedal carnivores ...

Paleontologists, aided by amateur volunteers, have unearthed a previously unknown meat-eating dinosaur from a fossil bone bed in northern New Mexico, settling a debate about early dinosaur evolution, ...

When University of Chicago paleontologist Paul Sereno came upon a Herrerasaurus skull in the Argentine badlands in 1988, he burst into tears of joy. The skull-and other nearly complete skeletal ...

Herrerasaurus ischigualastensis is an early saurischian dinosaur. It shared a bipedal, running anatomy common to large carnivorous dinosaurs that would evolve in the future, but this dinosaur lived at ...

Tawa hallae was a dog-sized bipedal carnivore that lived 214 million years ago in the Triassic era. ((Jorge Gonzalez)) A new raptor-like species of dinosaur found in New Mexico is providing answers to ...