Field crews in Wyoming uncovered not one but four snake fossils so intact that their skulls, ribs, and tails lay in ...

What happened to all the megafauna? From moas to mammoths, many large animals went extinct between 50 and 10,000 years ago.

Scientists dated a Scottish fossil, Westlothiana, to 346 million years ago, revealing its role in early land animal evolution ...

Discovery of a 700-million-year-old creature rewrites the story of animal evolution, revealing surprising new origins of life ...

The researchers analyzed rare fossils of hatchling birds found in northern Alaska, which offered the earliest evidence of the ...

For over a century, scientists have wrestled with one of biology’s most fundamental mysteries: how the first animals evolved.

The Chicago Archaeopteryx provides rare 3D insights into skull evolution, soft tissue structure, and the first evidence of ...

Fossil tracks from Australia reveal reptiles appeared 40 million years earlier than thought. The origin of reptiles on Earth ...

The fossils of ancient salamander-like creatures in Scotland are among the most well-preserved examples of early stem tetrapods -- some of the first animals to make the transition from water to land.