This my Theory to add to the top.
The apes where originally humans.
Millions of years ago humans have reached very high advanced technological civilization. It ended by nuclear war. Most vanished. Survivals had DNA changes and deformities. Evolution took over only full human and non human (the apes) evolved, nobody in-between. And now we are here again. If you think this did not happened, good, you should stop it from happening.
RE: It's all just a theory.