HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Ammonite fossil. Person holding a fossilised ammonite. Ammonites were marine invertebrates. They first appeared in the fossil record around 400 million years ago in the late Silurian and early Devonian periods and became extinct around 65 million years ago at the end of the Cretaceous period. Specimen from the Himalayas.
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