Source : Livescience By Tia Ghose, Staff Writer | LiveScience.com The fossilized jawbone and teeth of a 5-million-year-old fox have been unearthed in Tibet. The fox, Vulpes qiuzhudingi, is probably the ancestor of modern Arctic foxes. The discovery, along with several other fossils from cold-loving mammals, buttress the Out of Tibet hypothesis: That iconic ice-age […]