The ratios of strontium isotopes in fossil shark teeth can be used to better understand how coastal environments evolved in ...

The bull shark has needle-like teeth that are slightly serrated, for example. They mostly eat fish, but will also catch turtles and other species of sharks. Some needle-like teeth, such as those of ...

Various kinds of shark teeth can be found in these places, including those from megalodons, mackerel sharks (including great whites and large mackerel), ground sharks (including sand tigers ...

The fossilized remains belong to Cosmopolitodus hastalis – an extinct mackerel shark closely related to the modern great ...

Sharks have teeth that are kind of on a conveyor belt. As the front ones break out, they're replaced by others that roll forward to take their place. Big shark species might get through 50,000 ...

A new species of shark that was one of the ocean's top predators after the extinction of the dinosaurs has been discovered in the United States. The fossilised teeth were found 100 years ago in ...

Numerous shark species are capable of inflicting mortal ... Ranging from 15 to 20 feet in length and equipped with rows of razor-sharp teeth, they are apex predators capable of inflicting serious ...

Shark tooth fossils in sandstone matrix ... insights for identifying patterns in shark populations, such as which species coexisted, their feeding behaviors, and how these changed over time.