Idaho State University professor and curator of the ISU Museum of Natural History's earth sciences division, Leif Tapanila, shows off a complete fossil of the teeth from the ancient shark species Helicoprion Friday, Sept. 28, 2012 in Pocatello, Idaho. 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 Tapanila, who identified the teeth and linked them to a prehistoric shark called Helicoprion. (AP Photo/The Idaho State Journal, Michael O'Donnell)
Leif Tapanila
Idaho State University professor and curator of the ISU Museum of Natural History's earth sciences division, Leif Tapanila, shows off a complete fossil of the teeth from the ancient shark species Helicoprion Friday, Sept. 28, 2012 in Pocatello, Idaho. 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 Tapanila, who identified the teeth and linked them to a prehistoric shark called Helicoprion. (AP Photo/The Idaho State Journal, Michael O'Donnell)
