(April 30, 2015 at 11:40 am)downbeatplumb Wrote:(April 30, 2015 at 11:05 am)Tonus Wrote: Google "evolution of bipedalism in hominids" and you'll see that this isn't true. There are still questions about the evolution of bipedal hominids, but you seem content to shield yourself from even the stuff that has been learned in order to deny that it is known. If your worldview is dependent on ignorance to that degree, then it's time to broaden it or outright reject it.
Bipedalism isn't optimal now. We get back ache and painful births because originally we were four legged creatures.
Actually... originally, we were marine creatures (see laryngeal nerve )