The fossil may have lost water, or color ... The proteins in the dentine darken with heat but the mineral of the teeth - apatite - remains unchanged Compare the very young limpet and abalone shell ...

The clam's small size and unique appearance ... Cymatioa cooki after Edna Cook, an amateur shell collector who had first recognized the fossil's distinctiveness among thousands of shells.

They turn up in the fossil record in the early Cambrian ... Scallops, which are the sister group to the disco clam’s family Limidae, have exceptional vision, for example. They have taken a lot of ...

But as it turns out, a foot is just one of the many bizarre features you'll find inside a clam. Like oysters and mussels, clams are bivalves, a kind of mollusk that's encased in a shell made of ...

The fossil that was originally interpreted to be a plant, but researchers have now discovered is the inside of the shell of a baby turtle. Disclaimer: AAAS and EurekAlert! are not responsible for ...