13,000 Years Ago
National Geographic reports on the oldest art found in the Americas:
The carved bone, which depicts a walking mammoth, was found near Vero Beach in east-central Florida in 2006 or 2007. (See a map of the region.) Since its discovery, scientists have been working to determine the authenticity of the 13,000-year-old artifact. Now, several experiments reveal the etching is indeed ancient, scientists reported recently in the Journal of Archaeological Science.