POCATELLO, Idaho (AP) — A crew of miners working in southeastern Idaho’s phosphate patch unearthed the latest fossil evidence that sharks once roamed the seas that covered the region more than 250 million years ago.

Last week, miners employed by Monsanto Co. discovered a spiral-shaped array of fossilized teeth buried in a heap of deposits at a site near Soda Springs. The crew, recognizing the importance of their find, immediately called Idaho State University professor Leif Tapanila, who identified the teeth and linked them to a prehistoric shark called Helicoprion.

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