Arizonasaurus was an archosaur from the Middle Triassic.

“The Flintstones” may now be considered historical fiction. A new paper published in the journal Current Biology suggests that human ancestors lived with dinosaurs for a short time before the ...

The meat-eating dinosaurs known as theropods that roamed the ancient Earth ranged in size from the bus-sized T. rex to the smaller, dog-sized Velociraptor. Scientists puzzling over how such wildly ...

“The earliest human fossils don’t turn up until long after the dinosaurs and there are no mixed remains.” When studying human origins, “you don’t see the first ancestral humans until about 2.2 million ...

All human beings age. It is part of our biology and limits our lifespan to slightly over 120 years. Not all animals experience aging during their lives. Some animals' bodies do not gradually ...

“Of the giant carnivore dinosaurs, T. rex is the one we know the most about because it has a pretty good fossil record,” Rowe says. There are many complete skulls which have already been scanned and ...

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For decades, scientists thought they had dinosaurs figured out, then someone would discover something new and everything would change. The […] ...

A 230-million-year-old fossil found in Argentina shows that the evolution of sauropod dinosaurs’ long necks began earlier ...

The footprints have been determined to be left by Cetiosaurus, which grew up to 16 meters long and lived during the Jurassic ...

Researchers tried a new approach to resolve the scientific debate over whether it was a giant asteroid or volcanoes that wiped out the dinosaurs -- they removed scientists from the debate and let the ...