Ancient jade artifacts in China show precision machining that defies conventional dating to 3400 BC—raising questions about pre-flood civilizations and whether major archaeological timelines are fundamentally wrong. Researcher Cassie Coppersmith examines unexplainable structures worldwide, from Indian temples with lathe-turned pillars to Cambodia's hidden cities revealed by LIDAR, arguing geological and sculptural evidence contradicts accepted histories by thousands of years. Nephrite jade artifacts from Liangzhu culture (3400 BC) display drill marks and geometric precision that match modern machining, yet archaeologists attribute them to bamboo and abrasive strings despite experimental evidence showing vastly inferior results.