Researchers have uncovered fascinating new insights into the world's largest rock engravings, proposing that they may have been intended to mark territorial boundaries. The pre-Hispanic (or pre ...

Later, researchers stripped off a layer of moss covering much of the rock face to reveal a much larger engraving: a life-sized medieval knight with pleated armor and a shield … or, at least, that’s ...

It is just a few criss-crossing lines scored into rock, but this one little relic implies that our lost cousins were more creative than we ever imagined. Energy CEO Lorenzo Simonelli wants to work ...