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Author Topic:   why is the lack of "fur" positive Progression for humans?
Rrhain
Member (Idle past 37 days)
Posts: 6349
From: San Diego, CA, USA
Joined: 05-03-2003


Message 33 of 202 (449807)
01-19-2008 3:55 AM
Reply to: Message 32 by MartinV
01-19-2008 3:28 AM


MartinV writes:

quote:
it could be the pelvis channel that should accomodate during evolution to the child head.

But one of those things is more malleable than the other. When you press a piece of putty to the wall, the interface between them becomes complimentary, but it isn't the wall that's adjusting to the putty.

Now, while it is true the bones of the pelvis will shift during childbirth, they aren't going to shift nearly as much the fetus will be able to. Notice, childbirth is pretty taxing on the fetus as it is. It needs to turn upside down (which happens late) and then needs to pretty much corkscrew its way out in order to make it not only through the pelvic opening but around and by the sacral curves.

If there were a pressure on the female body to make it easer for childbirth, then the pelvis would be much more accomodating than it currently is. Since it isn't, since the fetal morphology is the one doing most of the work, it would appear that it is easier to adapt the fetus to the mother than the mother to the fetus.


Rrhain

Thank you for your submission to Science. Your paper was reviewed by a jury of seventh graders so that they could look for balance and to allow them to make up their own minds. We are sorry to say that they found your paper "bogus," specifically describing the section on the laboratory work "boring." We regret that we will be unable to publish your work at this time.
This message is a reply to:
 Message 32 by MartinV, posted 01-19-2008 3:28 AM MartinV has not yet responded

    
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