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 ...

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 ...

Unlike snails, ammonites coil in one plane and are neither left- nor right-handed. We now know that ammonites were sea creatures with a shell. Much of the original shell of this ammonite from the ...

Ammonites are extinct marine mollusks that thrived in Earth’s oceans for over 300 million years before their extinction around 66 million years ago. They were spiral-shelled creatures ...

Here's the story of how a fossil is made. This is an ammonite. Ammonites were once sea creatures with squid-like tentacles and a curly shell like a snail. They lived at the same time as dinosaurs.

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 ...