To do our study, we selected shark tooth specimens from two significant Neogene-period fossil sites in Florida. The Neogene, from 2.6 to 23.5 million years ago, was a time of immense change in ...

The fossil is from the left side an upper jaw, Godfrey also said, adding that the size of the tooth indicated that the shark — considered by scientists to be a "transoceanic superpredator," acco ...

A rendering of Clavusodens mcginnisi, or “McGinnis’ nail tooth,” an ancient ... has been dubbed the “chipmunk shark” by researchers who found its fossils in Kentucky.