Stone Blades Cut Back Evolutionary Dates by Brian Thomas, M.S.* Evolutionary anthropologists once thought that stone knives were developed in the late Stone Age, around 40,000 years ago. That figure was later revised to 200,000, around the Middle Stone Age, when stone blades were discovered in lower strata. Now stone blades have been found in Kenyan rock layers dated at about 500,000 years old according to evolutionary estimates.1 Thus, the original claim that “40,000 years ago, man made his first stone implements” was off by over 92 percent, suggesting that evolutionary depictions of human history are unreliable....