Students Patrick Rohrer, Sarah Warthen, Alix Piven and Lauren Urane are led by Mercyhurst University Archeologist Andy Hemmings. Their project has picked up where Florida's State Geologist Elias Sellards left off in 1915. Sellards led an excavation of the site where workers digging a drainage canal found fossilized human remains. Greg Allen/NPR hide caption

itoggle caption Greg Allen/NPR

Woolly mammoths depended on tiny flowering plants for protein. Did the decline of the flowers cause their extinction? Per Möller/Johanna Anjar hide caption

itoggle caption Per Möller/Johanna Anjar