Sophisticated sharks The discovery of bone in the jaw of an ancient shark indicates modern sharks are far more advanced than previously thought, say researchers. The finding, reported in the journal ...

The evolution of the shark is not what most people would expect. Instead of sharks evolving from a massive predator, the original creature was a small, leaf-shaped fish. This fish lacked eyes and fins ...

An X-ray nanotomography reconstruction of the intermedial cartilage of a blacktip shark. The colors indicate the thickness of the struts, with red representing thicker areas and blue indicating ...

Sharks are some of the ocean's top predators. In fact, sharks and their relatives were the first vertebrate predators on Earth. Shark fossils date back more than 400 million years -- that means sharks ...

Our understanding of shark evolution may need to be rethought following the discovery of a 410-million-year-old ancestor of this group of fish. Sharks are cartilaginous fish, meaning their skeletons ...

In some circles, Arkansas is known for its sharks. Their fossilized remains are embedded in the Fayetteville Shale, which was once a muddy sea floor. These well-preserved fossils prompted one ...