This forum is a real blessing to me. I have been a student of the sciences ever since I was a child and have wanted to pursue my collegiate studies in my spare time. I'm sure this forum will be of great help and hopefully I will be able to contribute a few things myself.
Recently I watched a very informative PBS special that made some very interesting assertions about man's early evolutionary development.
The first statement was that the consumption of meat is what prompted greater growth and a higher degree of intelligence in the brain's of the homonids. My first question is, if this true, then why didn't the consumption of meat have the same affect on many other meat-eating animals?
Secondly, it stated that a very particular reason for man's progression to walking upright. It claims that Australopithecus Afarensis began walking on two feet because it saved a modest amount of energy. In fact, they quantified that energy as the amount contained in a single biscuit. The ostensible reason for the extra efficiency was for the sole purpose of being able to recover slightly faster from child birth, thereby allowing a female to produce more children in her lifetime. My question on this is, what evidence is there to support that theory? It seems a bit of a stretch to me, but I would be grateful if someone could illustrate and supportive evidence to this theory.