Arizonasaurus was an archosaur from the Middle Triassic.

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 ...

Don't tell the producers of Jurassic World, but dinosaurs like Tyrannosaurus rex may have grown even larger than we previously thought based on the fossils they left behind. This is the conclusion of ...

"The pace of change we’re seeing today is unlike anything we know of in the past 66 million years," said ecologist Jack Hatfield.

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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 scientist says that the human lifespan could be so short due to the dinosaurs. While that might sound a bit wild, especially since modern humans didn't live at the time that dinosaurs did, it all ...

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

RICHMOND, Va. (WRIC) — The new “Ultimate Dinosaurs” exhibition will roar its way into the Science Museum of Virginia this summer. Starting Saturday, May 31 through Sept. 1, The Science Museum will ...