1) Yes, milk. Is it so hard to believe that we early generations didn't drink another animals milk until we started farming cattle? Early humans weaned off of their mothers milk and naturally were lactose-intolerant. Those with higher tolerances gained a reproductive advantage (probably lived longer and stronger because of better nutrition). You are willing to believe in a 2,000 year old book of unverifiable tales of magic, but this is hard to believe? 2) Our diet used to consist of tougher foods before tools were invented to chop food smaller and tenderize it. Our jaws are getting smaller because we don't work them like we used to, no room means less teeth. Wisdom teeth don't fit. 3) There are different theories as to why the brain is getting smaller. A smaller brain is tied to higher efficiency and social, unselfish tendencies. We are the most social, interdependent animals to ever exist. 4) Blue eyes were simply a mutation that survived via natural selection.