Wow! Thanks for the compliment.

emotions (whatever they are)

Ain't that the truth. I to have wondered that question. I can only make a guess, but why not. 70,000 years ago was an evolutionary event that after which humans were different. Tools, art, social structures, funeral practices and others all changed. You could say that the brain re-arranged. You could be more specific by saying the parietal lobe developed. You could even get more specific and say that the structure on the parietal lobe that integrates it developed more. I wonder if emotions are a thought integration method.

You would probably love my stuff on instincts.