Scientists have discovered several ancient shark skulls and an almost complete skeleton in Morocco's eastern Anti-Atlas Mountains. The remains belong to two species of the genus Phoebodus—a primitive ...

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Russell has a PhD in the history of medicine, violence, and colonialism. His research has explored topics including ethics, science governance, and medical involvement in violent contexts. Russell has ...

Almost everything paleontologists know about ancient sharks comes from their teeth. That’s because the animals had skeletons made of cartilage, which does not fossilize as easily as bone. So ...