Re: Bipedalism and speculation (was bipedalism and theorizing... was Re: Morgan and creationists

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<<Which brings up the significance of expanding crania. It appears that
the benefits of having large headed offspring (however helpless) must
have outweighed the risks. One of the risks I see little mention of
around here is to the mother in trying to give birth to such
offspring. Ouch!!!

There is some evidence that the pelvic opening of female
h.s.neandertal was relatively small compared to extant homo sapien
females. We know that the average size of the neandertal brain case
is larger than that of the average extant homo sapien. If the
neandertal infant is anything like todays' homo sapien infants...and I
honestly do not know about that, but if they were, it makes one ponder
the infant mortality rate in neandertal, not to mention the survival
of the mother!

Karen>>

Or perhaps the prematurity of birth, and subsequent greater infant
helplessness.

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