Old dog, new tricks: Study IDs 9,400-year-old mutt
Early Dog
Researcher Samuel Belknap III works at his microscope in his research lab, Friday, Jan. 14, 2011, at the University of Maine in Orono. Belknap found a bone fragment of what he says is the oldest-known domesticated dog in North America, while examining a waste matter recovered from Hinds Cave in Texas. (AP Photo/Robert F. Bukaty)