Scientists have discovered a 23-million-year-old rhino species in the Arctic, revealing that these animals once lived far north and reshaping what scientists know about their evolution and migration. Scientists have discovered a 23-million-year-old rhino species in the Arctic, revealing that these animals once lived far north and reshaping what scientists know about their evolution and migration. 23-million-year old Rhino fossil Rhinos shows they... [442 chars]