A collection of vicious weapons made of shark teeth reveals that two species of sharks vanished from the reefs of Kiribati before scientists even noticed the species were there. Until about 130 years ...

From embryo to turtle cracker: a team led by palaeobiologist Julia Türtscher from the University of Vienna studied the multiple changes in tooth shape in the tiger shark. The study, recently published ...

Sharks are known as iconic marine predators — and their sharp chompers come with the territory. Certain shark species can have hundreds to thousands of teeth at a time that are consistently yanked out ...

(Close-up of a shark with sharp teeth. Credit: GIOVANNI NITTI / Shutterstock.) Shark teeth are a marvel of evolution. They are so sharp that many island cultures once used them as weapons and tools to ...

The 3-inch long teeth are on display at the Melbourne Museum. No, this isn't a publicity stunt for the new movie "Meg." A teacher and fossil enthusiast found a giant set of prehistoric shark teeth ...

STANFORD, Calif. (KGO) -- If you ever come face-to-face with the wrong kind of shark, there's something you probably want to avoid. Just a hint: they're long and really sharp. But now, researchers at ...

A rendering of Clavusodens mcginnisi, or “McGinnis’ nail tooth,” an ancient shark that stalked the ocean floor 340 million years ago. Rendering courtesy of the National Park Service A shark no larger ...

Bull sharks (Carcharhinus Leucas) are one of the ocean’s most fearsome creatures. Although some animals may prey on bull sharks, such as crocodiles, killer whales, and the occasional great white shark ...