Often overlooked in the Morbihan, the northwestern department of France known for its neolithic monuments, is this site at Locmariaquer. The Grand Menhir of Er Grah is also the largest stone moved by humans during the Stone Age. The catch is that it is no longer standing, having been toppled in prehistoric times by uncertain causes. It is not precisely known how a rock 20.6 meters long and weighing 330 metric tons could have been moved several kilometers and erected upright. Even more remarkably, it was erected around 4700 BCE,…
