It could have been as early as one point five million years ago that early hominids begin using fire. Then, stone tools out of Kenya. Language, bipedalism, and advancements of the cranium. Then we had art… elaborate cave paintings, jewelry, tattoos, and garments. Intelligence, as we know it, has been measured. With carefully collected data we can conceptualize just exactly how human we really are. A constant reminder to ourselves that we really do exist. A real schematic of time and space.