Amputated right tibia of a giant sea turtle archelon Ischyros; from Pierre Cretaceous of the South Fork, Cheyenne, South Dakota

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Credit

Amputated right tibia of a giant sea turtle archelon Ischyros; from Pierre Cretaceous of the South Fork, Cheyenne, South Dakota. Wellcome Collection. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.