Evolution

Homo Ergaster was probs the most important one because of their imaginative minds. They were the first ones to notice that animal tracks meant that animals were somewhere near and they were able to recognize that birds flying over head probably meant that their was food somewhere. They also had wider noses to help them breathe a lot better which in turn made their energy level so much greater. The whites of their eyes was another thing that came into play during this era. Overall they were the first to see patterns in the universe. Oh and they also were the first to like discover fire and stuff so they could like see at night and be totally warm.