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 ...

In some cases, when a shark loose a tooth it can be replaced within 24 hours ... When these minerals reach the tooth, a chemical reaction takes place, which slowly turns the tooth into a fossil.’ The ...

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.

Researchers collecting fossils deep inside Kentucky's Mammoth Cave have uncovered the remains of a never-before-seen species — an absolutely tiny ancient shark with nail-like teeth.

In the depths of the world's longest cave, researchers have uncovered the fossilized remains of a 340-million-year-old shark. This small predator, named Clavusodens mcginnisi, intrigues with its ...

But what did they evolve from, are they ‘living fossils’, and how did they survive five mass extinctions? Sharks belong to a group of creatures known as cartilaginous fishes, because most of their ...

The now-extinct megalodon shark may have been larger than first believed, reaching lengths of 80 feet (24.3 meters), according to a new study published in Palaeontologia Electronica last week. This is ...

A new-to-science species of ancient shark was recently discovered in Mammoth ... The new species was identified by researches through fossil teeth collected from deep inside the Ste.