eneath the murky water lies an incredible collection of prehistoric fossils and ancient shark teeth. Every dive uncovers more evidence of creatures that once ruled the oceans millions of years ago.

Until recently, Orthacanthus gracilis could have been considered the "John Smith" of prehistoric shark names, given how common it was. Three different species of sharks from the late Paleozoic ...

POCATELLO — A late-night glance at his inbox almost caused Leif Tapanila to fall out of bed. Looking at the screen of his phone, the director of the Idaho Museum of Natural History and professor of ...

Tooth of the xenacanthiform shark Orthacanthus lintonensis Babcock, 2024, from the Upper Freeport Coal (Carboniferous) of Linton, Ohio. The tooth is about 13 mm long. COLUMBUS, Ohio – Until recently, ...