evolution

I think that homo ergaster was the most significant stage in human development. A big help for them was the development of their cooling system. They started sweating in order to preserve oygen, instead of panting. Besause of this, they were able to adjust better to the environment. Another trait of theirs was forming whites in their eyes. This allowed them to have better communication and show emotions more clearly. Lastly, a larger brain helped them track animals and look for weather patterns. Home eraster helped us become who we are today.