A fossilized skull and teeth from a newly described species of beaver that lived 28 million years ago have been unearthed in eastern Oregon. The fossils worked their way out of the soil within a mile of the visitor center at the John Day Fossil Beds National Monument, said the monument's paleontologist, Joshua Samuels. The find is significant, he said, because unlike the other species of ancient beavers found at the monument, this one appears related to the modern beaver, a symbol of Oregon found on the state flag. The others all went extinct. The species is named Microtheriomys brevirhinus....