More human like y classic homo erectus form in china. Key trait used to identify them. y now that they have fire, they can stay past sunset and have time to discuss things and interact on a social level. Interesting jump in what there doing with their day. y. When you live in equator you want to be tall and thin so you can increase surface area to take up less space to sweat. y he has interesting feature in back of neck. Extra muscle to hold head because they are good at long distance running than homo sapiens have ever been. It lasts 1 my, we can t say that about other tools without changing for a million years. The only difference is we see in size. Maybe it was socially symbolic. y unlike oldewan, we don"t know what they were doing with these.