The Homo erectus remains from East Africa show several differences from the Javanese and Chinese fossils. Some African cranial specimens—particularly ER 3733, presumably a female, and WT 15000, presumably a male—aren’t as strongly buttressed at the browridge and nuchal torus, and their cranial bones aren’t as thick. Indeed, some researchers are so impressed by these differences, as well as others in the postcranial skeleton, that they’re arguing for a separate species status for the African material, to distinguish it from the Asian samples. Bernard Wood, the leading proponent of this view, has suggested that the name Homo ergaster be used for the African remains and that H. erectus be reserved solely for the Asian material (Wood, 1991). In addition, the very early dates now postulated for the dispersal of H. erectus into Asia (Java) would argue that the Asian and African populations were separate (distinct) for more than 1 million years. With the discovery of the Daka cranium in Ethiopia and continued comparison of these specimens, this species division has not been fully accepted; the current consensus (and the one we prefer) is to continue referring to all these hominins as Homo erectus (Kramer, 1993; Conroy, 1997; Rightmire, 1998; Asfaw et al., 2002). So, as with some earlier hominins, our interpretation of H. erectus requires us to recognize a considerable degree of variation within this species.