hahahahahaha!The humans 12'000 ago didn#t exist, since the world was created only 700 or 600 years ago, look kid, kids who are sedentary at only 16 or 17, end up being stronger and bigger than their father through natural growth, when at the same age their father would have been much more active. We will get the strength all the time. Most middle aged men tend to be around 160-170lbs, old enough to be the 16 year olds dads, the younger generation are getting stronger and stronger, most 17 year olds tend to be around 170-180lbs, that says to much kid. And the average height of americans doesn't apply to younger men, the average age of an american man is 34 years old, where the average height fot that generation is only 5'8-5'10, younger men are around 5'11-6'2, just look around you and you will notice.
Ok, ok, I get the joke now. Well done!