Oldest North American Rock Art May Be 14,800 Years Old. ... The so-called petroglyphs, carved in soft limestone millennia ago, range from simple lines, pits, ...

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 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 ...