A rare dinosaur-age fossil has been found which could ... prior to the evolution of the shells that we see in modern snails and clams." According to the Natural History Museum molluscs are ...

The fossil was found at a cliff in Denmark. Fossilized vomit is called regurgitalite, and it's a type of trace fossil, which ...

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.