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LiveScience
LiveScience
Patrick Pester

Ancient shark discovered deep inside world's longest cave system

Mammoth Cave the National Park Service Kentucky
Macadens olsoni had a unique curved row of teeth, called a tooth whorl. (Image credit: Art by Benji Paysnoe)

Researchers have discovered the remains of an ancient shark deep inside the world's longest cave system.

The newly discovered shark, plucked from the walls of Mammoth Cave in Kentucky, lived around 340 million years ago and was equipped with a curved row of teeth that it used for crushing its prey.

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