Fossil molluscs (Caprina adversa). These fossils are rudists, a group of prehistoric bivalved molluscs that had unusually-shaped shells. These specime

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Fossil molluscs (Caprina adversa). These fossils are rudists, a group of prehistoric bivalved molluscs that had unusually-shaped shells. These specimens, found in France, date back to around 100 million years ago, in the Early Cretaceous epoch.

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Photo credit: © PASCAL GOETGHELUCK/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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