<p>‘It is amazing to imagine these giant flying squirrels gliding over rhinos and mastodons living in the forests of Tennessee.’</p> <p>The post <a href="https://www.popsci.com/environment/flying-squirrels-appalachia/">Flying squirrels the size of cats soared over prehistoric Appalachia</a> appeared first on <a href="https://www.popsci.com">Popular Science</a>.</p>