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"No other living (or extinct) salmon possesses teeth with such an unusual orientation ... could have easily killed, or injured a shark, dolphin, sea lion, or rival spike-toothed salmon." ...

A species called the salmon shark can maintain a body temperature ... of the temperature at which a material formed—in mastodon teeth. They confirmed that the megalodon samples were consistently ...

Megalodon teeth are common fossil discoveries ... equally related to other macropredatory sharks such as the Makos, Salmon shark and Porbeagle shark, as well as the great white," Pimiento said ...

A species called the salmon shark can maintain a body temperature ... its body temperature using things we actually do have: its teeth. The work relies on a phenomenon known as isotope clumping.