If you thought that crocodiles were menacing enough, be glad that you didn’t live in Arizona some 225–201 million years ...

Learn how fossils from Arizona’s Petrified Forest National Park revealed that a Late Triassic crocodile relative may have started life on four legs before walking on two as an adult.

“Most bees are solitary. They lay their eggs in small cavities, and they leave pollen for the larvae to eat,” explained paleontologist Lazasro Viñola López. “Some bee species burrow holes in wood or ...

Until now, estimating how old a dinosaur was when it died has been a fairly simple process — just count up the growth rings in its fossilized bones. "We always thought that those rings were formed ...