When you look at Stonehenge, what you're really seeing is the wreckage and restoration attempts of something much older. The monument has puzzled researchers for generations, but the structure itself holds clues about what came before. There are two distinct types of stone: the rhyolitic bluestone, an igneous rock forming the inner circle and horseshoe, and the sarsen stones, predominantly quartzitic sandstone. The question isn't just what Stonehenge was, but what it was rebuilt from. He argues that pre-Younger Dryas civilizations were highly advanced, though not in ways that mirror our modern industrial society. The evidence sits in plain sight at sites like Stonehenge, where the choice of materials and the geometric precision suggest knowledge systems we're only beginning to decode.