Paleontologists have found the 4.9-million-year-old (Early Pliocene) fossilized remains of the extinct flying squirrel Miopetaurista webbi in Tennessee, the United States. The occurrence of the genus Miopetaurista in eastern North America is puzzling, as it is distant from the known geographical range of the genus and of that of its sister species, the living Petaurista. The researchers hypothesize that Miopetaurista, which was linked to warm forested...