Paleontology

Geologic evidence for a freezing arctic suggests dinosaurs could have weathered an epoch-ending volcanic winter

Some species were constrained by their food sources, while others ranged widely

The first known male appendage from trilobites has been found in a 508-million-year-old fossil

They scurried in the shadows of dinosaurs for millions of years until a killer space rock created a new world of evolutionary opportunity

An amazingly well-preserved fossil suggests the common ancestor of dinosaurs and pterosaurs also had some type of feather or feather precursor

A well-preserved fossil introduces a new species that lived in what is now California around 42 million years ago

New fossils are changing a decades-old story about the species that roamed the Mediterranean 80 million years ago.

Researchers want their models to inspire more accurate reconstructions of extinct animals such as mammoths and saber-toothed cats

Microbe DNA trapped in 3,500-year-old fossils shows canine adaptation to agricultural diets

Seeds found in fossilized tracks fuel new speculation about when—and how—people arrived

This may be for the same reason humans swing their arms when walking and running

Ice age impressions in limestone show that human ancestors inhabited the area