We mostly discover these extinct sharks through their teeth, which they grew in large numbers throughout their lives and which hold up better to time than the cartilage throughout the rest of ...

If sharks went extinct, it would set off a chain reaction. Sharks play an important role in the food chain. Smaller animals like shellfish may go extinct if there were no sharks to eat seals ...

Scientists have long debated the true size of the megalodon (Otodus megalodon), which went extinct about six million years ago. The debate remains unresolved in part due to sharks lacking bones ...