Florida researchers have identified a record-breaking great white shark as it is tracked down Florida's coastline ahead of ...

A tiny shark species dating back hundreds of millions of years has been identified at Mammoth Cave National Park in Kentucky, the National Park Service said.

The shark's back teeth had flat crowns and long bases resembling old iron nails, which contributed to its common name. The front teeth were more chisel-like, suggesting a diversified diet.

Normally, an animal can’t grow so old. Over time, declining bodily functions and illnesses like cancer accumulate and take their toll. Yet the Greenland shark seems to defy this pattern ...

An ongoing Paleontological Resource Inventory discovered the new species, called Clavusodens mcginnisi, while collecting ...