In a message dated 11/12/1999 4:01:35 PM Eastern Standard Time,
[log in to unmask] writes:

<< Since man does not differ from Neanderthal only in brain development but
al=
 so in skull
 shape, there have to be reasons for development of both differences at the =
 same time
 because a forebrain can't develop without a forehead.   Further, that foreb=
 rain would be
 useless unless at the same time there is development of the advanced periph=
 eral nervous
 system, and changes in the vascualr system to support the peripheral nerves=
 , and changes
 in glandular function and biochemistry to support all of it.  Personally I =
 think that this
 kind of problem (need for simultaneous development of numerous new biochemi=
 cal,
 physiological and anatomical characteristics in the transition from one spe=
 cies to
 another) presents great, if not insurmountable problems for a theory of evo=
 lution by
 natural selection.
  >>
The sull portions and bony surrounding of the spinal cord do not need
separate routes of decelopment than the nervous system which they protect.
Organisms with three sets of developmental layers grow and differentiate the
various tissues in relation to each other. And, it is precisely what is
encompassed within natural selection.