Engraved Fossil May Be North America's Oldest Art...

An engraved bone, believed to be from a mastod...  ...An engraved bone, believed to be from a mastodon, giant sloth or mammoth, may be the oldest example of primitiv...

http://www.neatorama.com/2011/06/29/engraved-fossil-may-be-north-americas-oldest-art/