Discovery of Caral (dated to 3000 BCE) was a shock for established archaeology, who rejected the existence of an ancient civilization in south America, prior to 1200 BCE. Now the discovery of Sechin Bajo appears to be a second shock, which pulls the date back to 3500 BCE. These two findings alone, show that Peru hosted an important, unknown civilization, 400 years before the Egyptian kingdom was founded by Menes and at least 250 years before the Sumerians took control of southern Mesopotamia. Amazing discoveries forces historians to reconsider their established "ancient history" cliches.