Some scientists and skeptics feel that Homo ergaster does not have what it takes to be a species of its own. Rather some feel that Homo ergaster is simply an early version of Homo erectus. Not everyone agrees that H. ergaster is indeed related to H. erectus, instead, there are some that believe Homo ergaster is a direct ancestor of Homo heidelbergensis, Homo sapiens, and Homo neanderthalis (Hazariza 2007). Again this view is not accepted by everyone either. In an attempt to better understand H. ergaster, fossil studies have been done by various scientists. As expected not all of these studies agree with one another.