Long before humans, Earth teemed with extraordinary predators and giants that shaped entire ecosystems. From the bone-crushing bite of T. rex to the ocean-dominating megalodon, these creatures reigned ...

A nearly complete 90-million-year-old dinosaur fossil, Alnashetri cerropoliciensis, is turning evolutionary theories upside ...

Coincident with the rise of the dinosaurs, a large landmass filled most of the Arctic circle, potentially contributing to ...

Scientists have discovered a Jurassic tectonic plate boundary that could help to predict what the planet might look like ...

A crushed skull reveals Ptychotherates bucculentus, a rare early dinosaur reshaping what we know about evolution before a ...

Ancient Earth once buzzed with enormous dragonfly-like insects, and scientists long thought high oxygen levels made their ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. DALLAS (AP) — Scientists once thought of ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. But we mammals did survive. The characteristics we now equate with “mammalness” are ...

Sixty-six million years ago, Earth’s balance shifted in a single strike. The asteroid impact set off firestorms, blocked out sunlight, and left food chains in collapse. Dinosaurs and countless other ...

Scientists have unearthed prehistoric insects preserved in amber in South America for the first time, offering an unprecedented glimpse into a pivotal era when flowering plants began to flourish ...