An engraved bone, believed to be from a mastodon, giant sloth or mammoth, may be the oldest example of primitive art ever found in the Americas. The carved bone features the depiction of an ancient mammoth, and was discovered by an amateur fossil hunter in Florida, in an area near Vero Beach where other mammoth bones have recently been found. The archaeological team working on carbon dating the bone feel that it is at least 13,000 years old, and that the etching must be at least that old as well.

Link