Opalized ammonite fossils are formed through a unique geological process involving the replacement of organic material with silica, which is the primary component of opal. This process can occur ...

Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...

A new study in Nature describing a fossil of a nearly complete and intact bird skull from Antarctica is shedding light on the ...

Learn more about Vegavis iaai, an ancient ancestor of modern-day ducks, and one of the earliest modern birds ever discovered.

A near-perfect fossilized skull discovered in Antarctica reveals the bridge between prehistoric and modern birds, a new study ...

Fossilised ammonite shells can be found all around the world, including on parts of Britain's coastline. But if you can't get to a beach to find some, why not start your own collection from home?

Ammonites were shelled cephalopods that died out about 66 million years ago. Fossils of them are found all around the world, sometimes in very large concentrations. The often tightly wound shells of ...

A new study by Ohio University found an important fossil of the oldest known modern bird, which lived in Antarctica when ...

Fossils found in the northern part of Hokkaido are a new type of ammonite, the once-ubiquitous spiral-shelled creatures that went extinct with the dinosaurs 65 million years ago, researchers said.

Ammonite fossils, an example is shown here, are sea creatures that became extinct about 65 million years ago. Fossil remains have been found in rocks of all ages. Fossils of the simplest organisms ...