WORLAND, Wyo. (AP) — For the past couple weeks, people have been seen doing something strange on the edge of the Big Horn River in Worland's Riverside Rotary Park.

Those people are a crew of graduate and post doctorate students from the University of Florida, University of Minnesota, Duke University and the Florida Museum of Natural History and what they are doing is washing dirt taken from an area east of Worland in search of small animal fossils.

The crew is led by Johnathan Bloch, a researcher at the Florida Museum of Natural History, who has been coming to Worland for over 20 years in sear...