evolution

I also think that the homo ergasters were the most significant. They could read each other better because of the white that were more visible in their eyes and that helped them communicate better. They also had less body hair which helped them to cool down easier than ape men before them. They could also sweat to cool themselves down. There was less panting as cooling system so that allowed them to start making noises with their mouths and eventually start talking. Bigger brains also helped them cope with their enviornment and allowed them to survive hardships that fame about them.