In the depths of the world's longest cave, researchers have uncovered the fossilized remains of a 340-million-year-old shark.

The US National Park Service announced the identification of a new species of ancient shark, Clavusodens mcginnisi, ...

This time period took place 359 to 299 million years ago. 3 min read The Carboniferous period, part of the late Paleozoic era, takes its name from large underground coal deposits that date to it.