A rare artifact has been discovered by archaeologists at an ancient mammoth kill site near Douglas, Wyoming, which they say is the oldest of its kind ever found in the Americas. The discovery, a tube-shaped piece of bone, is likely to have been a bead dating to around 12,940 years old, potentially making it the oldest known instance of American perforated jewelry. The discovery was made by University of Wyoming archaeology Professor Todd Surovell and his team at the La Prele Mammoth site, a location first revealed to archaeologists in 1986 when mammoth remains were found eroding out of a...