We have examined fossil bivalve shells to try to determine whether the obvious growth lines on the shells are related to tidal or other environmental phenomena. Although the study is continuing ...

Bivalves have been around for a very long time. They turn up in the fossil record in the early Cambrian, more than 500 million years ago, but their roots go even deeper than that. Since evolving, ...

Caption Stewart Edie, curator of fossil bivalves at the Smithsonian’s National Museum of Natural History. In a new study, Edie, Shan Huang of the University of Birmingham and colleagues ...