For the most part, these carvings stayed hidden from human eyes underneath layers of dirt. Eventually, the petroglyphs were ...

The engravings on the stone could also be the oldest known carvings made by humans, researchers say. Until now, the earliest known stone tools date from between 1,500,000 to 100,000 BC ...

ANCIENT rock carvings etched over 200,000 years ago could be the oldest ever uncovered, archaeologists believe. The exciting discovery inside a Spanish cave could rewrite human history and shed ...