Perhaps I can help shed some light on part of the subject.Not on the biochemical part of it .Bu first I must correct a basic misunderstanding or lack of knowledge of darwinian evolution .The difference between an ape walking on his legs occasionaly and a human being doing it permanently is crucial to the understanding of the mechanism of evolution .
I thought this little difference would not have escaped Arch 's attention .
I hope untill now no sources need to be provided ,it is common knowledge that we dont walk on hands and feet unless of course leaving the local bar after consuming way too much alcohol .Apes do , I mean they walk on all four even without lifting their elbows at the counter of the local tarzan saloon .
In fact when our ancestors decided to leave the trees permanently they found out that there were no pockets in their fur to give them an intersting stance so they fumbled around with those two useless appendices,playing with stones ,sticks ,picking their noses probably too.
So they had to find good use of those two things other than the already mentionned games.Believe me or not but they discovered they could trow things at those annoying animals that were either above or under them in the foodchain .Bingo weapons were born euh airborne I mean .
A step in human evolution if ever such a thing existed .
Unfortunately I have no evidence to backit up for Arch as the ancestors had no pocket in their furs to put their pencils in .
