Many eons ago, geologic forces in east Africa thrust up a north-south mountainous barrier in the rift zone that separated "Proconsul" into two groups. Those to the west evolved into apes while those to the east evolved into the first hominids that had access to the seashore and sea foods rich in amino acids essential to brain development. Primitive tool use coincided with increased procurement levels of these and other protein rich foods. Thusly, hominids became our ancestors.
Changing Landscape and Climate Change Shaped Human Evolution:
https://theconversation.com/how-a-changing-landscape-and-climate-shaped-early-humans-19862
Question: Where is the dividing line between the animal kingdom and the human kingdom?
