The shark's craggy teeth didn't sink into any T. rex flesh, Gates noted, but was more suitable for smashing a river's crawdads and snails. Still, its discovery so near a T. Rex has made scientists ...

Although numerous shark species are discovered and described each year, detailed descriptions of tooth shapes and heterodonty patterns are scarce or poorly known for most species.

Baby shark teeth The Mesozoic era stretched from 250 million years ago to about 65 million years ago, coinciding with the time when dinosaurs walked on the Earth. Unlike today's sharks, some ...

Although numerous shark species are discovered and described each year, detailed descriptions of tooth shapes and heterodonty patterns are scarce or poorly known for most species.