En 13000-årig ristning i ben, föreställande en mammut eller mastodont, kan vara Amerikas äldsta konstverk:
Earliest Art in the Americas: Ice Age Image of Mammoth or Mastodon Found in Florida
Researchers from the Smithsonian Institution and the University of Florida have announced the discovery of a bone fragment, approximately 13,000 years old, in Florida with an incised image of a mammoth or mastodon. This engraving is the oldest and only known example of Ice Age art to depict a proboscidean (the order of animals with trunks) in the Americas. The team's research is published online in the Journal of Archaeological Science.
http://www.sciencedaily.com/releases/2011/06/110621131334.htm