The document summarizes the appearance and traits of early humans from 3.6 million years ago to Homo sapiens sapiens. Early hominids like Australopithecus could stand upright and make tools, had ape-like features but walked on two legs. Homo habilis were the first to use stone tools in Africa. Homo erectus had skills in tool-making and fire, and were similar in size to modern humans. Homo sapiens sapiens had modern human-like skulls and were hunters and gatherers who used advanced stone and bone tools.