As researchers continue to learn more about sharks that lurked in Kentucky seas hundreds of millions of years ago, two new species have now been identified. The two new species of ctenacanth shark ...

Deep inside a pitch-black cave in Kentucky, researchers discovered a new species of ancient sea creature, according to the National Park Service. It left little to find, just strange teeth embedded in ...

A new species of ancient shark was identified by teeth found in a Kentucky national park. The teeth were found at Mammoth Cave National Park, which encompasses some of the Mammoth Cave, the largest ...

A young girl's tooth excavated from a cave wall in northeastern Laos is providing new insight into the mysterious extinct human species called Denisovans and revealing their resourcefulness in ...

A tooth found in a cave in Laos was found to be from an ancient human species called Denisovans. The tooth, most likely a girl's, places the extinct humans in southeast Asia for the first time. This ...

A new species of ctenacanth shark fossils was identified through fossils collected at Mammoth Cave in Kentucky. National Park Service As researchers continue to learn more about sharks that lurked in ...