Explanation

Character of Homo erectus (1.6 million to 200 000 years ago) Upright human protruding jaw, no chin, thick brow ridges and a long skull (i) teeth smaller than in habilis (ii) much larger brain than habilis (1000 mm) (iii) may have had advanced speech controlled fire (iv) made more sophisticated tools then predecessors (v) left Africa and spread throughout Asia and Europe