Homo erectus is a direct ancestor of modern humans and represents a key point in human evolution where evidence of a truly omnivorous diet becomes clear, including the use of tools for hunting and processing both plant and animal foods. This species shows significant brain enlargement and other adaptations indicative of complex foraging and social behaviors.

Survival: From about 1.9 MYA to 50,000 years ago. Emerged in Eastern Africa, spread throughout Africa, Asia, and into Europe.
Size: 4’9″ to 6’1″
Brain Size: around 600 to 1,100 cm³ 
Brain to Body EQ: 3.3 to 3.8 (humans=7.4 to 7.8)