They were also known as erect men. They appeared 1.5 million years ago and were thought to have eaten meat. They are also called middle Pleistocene men and were evolved from homo habilis. Their brain capacity was 900cc. Their cranium was present in the shape of a dome. This was to accommodate the large size of the brain. Their posture was erect and the males were larger than the females. They are probably the ones who discovered fire. The tools made by them from stones and pebbles were more elaborate. They had small canine and large molar teeth.