Stone tools are the oldest recorded example of a man-made object in the fossil record. This could have been the first foray into the making of man-made things. The way it develops over time gives us an idea of how, in the past, we began to think like humans. So far, the earliest stone tools discovered come from Turkana, Kenya, (Lomekwi 3 site in West Turkana, Kenya, S. Harmand et al, 2012, TBI and Stonybrook University) dated at 3.4 mya.