Skeletal and life style reconstructions of Docofossor brachydactylus is shown in this image courtesy of University of Chicago released on February 12, 2015. The earliest mammals are thought to have appeared roughly 200 million years ago, arriving on the scene during the Mesozoic Era with dinosaurs ruling the land and flying pterosaurs keeping an eye out for a quick snack. Read more http://www.nbcnews.com/science/science-news/two-tiny-jurassic-mammal-species-unearthed-china-n305421
