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

After a long fight in which the mako “leapt prodigiously and made incredible runs,” the shark ... with teeth.” That’s how photographer Brian Skerry describes shortfin makos.

Fossil teeth also help us to understand shark evolution. For example, we know that the extinct giant mako shark, Isurus hastalis, is the ancestor of today’s great white shark. The fossil record ...

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

Shortfin makos are the fastest sharks in the sea, but they're failing to outpace the scale of overfishing that is driving ...

A megalodon tooth fossil in the National Museum of Natural History's collection was found in Beaufort County, North Carolina. Smithsonian Institution Coupled with these saw-like teeth was an ...

from broad-toothed mako sharks. There are at least eight different species of hammerhead shark, and while fossil teeth evidence suggests that their ancestors may have existed 45 million years ago, ...

The 23ft long beast had huge flesh-tearing teeth that ripped through its prey and could grow up to the size of small boat. The fossil of the shark that roamed the seas millions of years ago was ...

The new fossils were found to be sharks that belonged to the mackerel shark group, which includes modern great white sharks, salmon sharks and mako. Like their relatives, they had teeth that could ...

Shark tooth fossils in sandstone matrix ... remains and the sedimentary layers in which they are found. Shark teeth are especially valuable for this purpose. Their abundance and durability ...