An international team of researchers has discovered a half-billion-year-old fossil with its internal organs still intact.

A 430-million-year-old fossil reveals that the first leeches were ocean predators, not bloodsuckers. The discovery radically shifts the timeline of leech evolution by more than 200 million years.

Scientists have made a jaw-dropping discovery, a 520-million-year-old fossil that has preserved not just its body, but its ...

Paleontologists have revealed the fossilized remains of a curious creature that is not only one of Earth's oldest animals, but may even be the first to have ever been mobile. Dubbed Quaestio ...

A fossil only tells part of the story. When an animal's body is preserved as a fossil, there are often pieces missing, and ...

We know them in death. We know how they died, some of what they ate, how they grew, where they may have roamed, and even if they suffered from disease or injury. Preserved bones can tell us a lot, but ...

A rock quarry in Wisconsin opened up to an ancient Earth, inhabited by beings that predated the dinosaurs. The latest discovery at the site by paleontologists was the fossilized remains of the oldest ...

Before you submit an error, please consult our Video Help page. Eons is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire ...

A fossil only tells part of the story. When an animal’s body is preserved as a fossil, there are often pieces missing, and ...

For more than 90 years, scientists have puzzled over an unusual 280 million-year-old reptilian fossil discovered in the Italian Alps. It’s unusual because the skeleton is surrounded by a dark outline, ...

KIMBERLY, Ore. (KTVZ) — A groundbreaking paleontological discovery at John Day Fossil Beds National Monument has uncovered fossilized footprints dating back as far as 50 million years, offering ...

For over a century, the scientific literature has credited western missionaries with "discovering" fossils in Lesotho, the ...