What was Homo Ergaster?
Homo ergaster was an early hominid species, and an important member of the human family tree. There is, however, some dispute over the classification of Homo ergaster. Some people believe that these early humans were actually a subspecies of Homo erectus, another early hominid, rejecting the classification of these human ancestors in a separate species. There is some debate as to which fossilized remains should be considered Homo ergaster versus Homo erectus. This species designation is widely used enough that it is unlikely to go away entirely without significant new fossil evidence, however. From the Homo ergaster fossils which have been found, scientists estimate that these hominids lived during the Pleistocene era, around the time that the Earth was going through a cycle of cooling. Differences between Homo ergaster and earlier ancestors suggest that these hominids evolved certain new traits in response to global cooling, including the ability to range far afield in search of food
