Quite fascinating indeed, and makes sense from an evolutionary point, history is littered with evolutionary cul-de-sacs, most not that distinguishable from the end product, whatever that may be.
Personally, I think that the human species rate of evolution has decayed since the invention of tools. We're still growing, average height in particular has changed dramatically over the past millennia, but our technology is evolving more than we are now which means that we no longer need to adapt as quickly as we once had to. Of course, being at the top end of the food chain helps a lot too.
