Origins of Homo sapiens? (its BInomial nomenclature, not TRInomial. Only need one "sapiens")
It is understood that modern man evolved from past species that have been in the Homo (man) genus. They were the link between the ancestor of ape/chimpanzee and man. The midway point, if you will. Over time, natural selection made it so that certain traits became more prevalent in past Homo species, and the population over time changed into what we know as Homo sapiens. This is only a rough schematic for the origin, but I think you see the gist.