The Native American art at Paint Rock goes back more than 2,000 years, ... The pictographs are spread out over a half-mile on a 70-foot bluff made of layers of limestone shelves.

The true age of this rock art had not been known, but a new analysis suggests these petroglyphs are the oldest in North America, dating back to between 10,500 and 14,800 years ago.

A reindeer engraved on the wall of a cave in South Wales has been found to date from at least 14,505 years ago -- making it the oldest known rock art in the British Isles.

A 12,000-year-old piece of limestone found in Spain includes something extremely rare: depictions of both human and bird figures. Only a handful of examples of Paleolithic European scenes ...