Homo ergaster
Around 1.8 million years ago, "Homo ergaster" first appeared in the fossil record in Africa. From "Homo ergaster", "Homo erectus" evolved 1.5 million years ago. Some of the earlier representatives of this species were still fairly small-brained and used primitive stone tools, much like "H. habilis". The brain later grew in size, and "H. erectus" eventually developed a more complex stone tool technology called the Acheulean. Possibly the first hunters, "H. erectus" mastered the art of making fire and was the first hominid to leave Africa, colonizing most of Afro-Eurasia and perhaps later giving rise to "Homo floresiensis". Although some recent writers have suggested that "Homo georgicus" was the first and primary hominid ever to live outside Africa, many scientists consider "H. georgicus" to be an early and primitive member of the "H. erectus" species.