[Seeking the truth]

"Millions of babies continue to die as a result of the mother's birth canal not being big enough for the head. What engineer would do such a lousy job? I would not want to do anything with a God who would design things so badly," Ayala says. ""

Point of order... Mr. Ayala.....why hasn't evolution allowed mother's birth canals to develop large enough for the increased brain size?

[laureldrive]

Excellent question!

[jlogajan]

why hasn't evolution allowed mother's birth canals to develop large enough for the increased brain size?

That's more criticism against your "intelligent designer", you know.

[mlo]

why hasn't evolution allowed mother's birth canals to develop large enough for the increased brain size?

Evolution doesn't require perfection. God, on the other hand...

[Almondjoy]

Good point.. but another reason why evolution is inperfect vs creationism which should be perfect.. well we'd hope it be anyways. Of course God has a plan for everything right?

[wardaddy]

Excellent point .

[stanz]

why hasn't evolution allowed mother's birth canals to develop large enough for the increased brain size?

Because then they couldn't walk. I'm no expert in biomechanics, but if the hips are widened, the gait would be affected.

Any biologists out there who can comment?

[dpwiener]

Point of order... Mr. Ayala.....why hasn't evolution allowed mother's birth canals to develop large enough for the increased brain size?

Maybe because it's still in the process of doing so; it just takes a long time. If "Millions of babies continue to die as a result of the mother's birth canal not being big enough for the head" as Dr. Ayala says, then those babies are not going to grow up to reproduce. On the other hand, those babies who don't die and do grow up to reproduce are the ones who will have birth canals which are more likely to be big enough for the heads of the next generation of babies.

If increased brain size has been outstripping increased birth canal size, it's because bigger brains are a more positive survival factor overall than bigger birth canals (even if that means a certain percentage of babies have to die from inadequate birth canals). This is proven by the fact that our bigger brains have allowed us to develop modern medicine and Caesarian sections which are quickly obviating the problem of small birth canals altogether. And that in turn means that evolution will stop selecting for larger birth canals, because genes which result in small birth canals will no longer be culled out.

[equus]

Why hasn't evolution changed the size of the birth canal? Because evolution selects what works. It works well enough in enough cases, the survival rate of the babies and the mothers is high enough. You just don't understand evolution. It is not teleological, it has no 'goal' in mind, certainly not perfection. It just means that what works, is selected. What is fit, is selected. It doesn't have to perfect, painless, or error-free, as long as it functions well enough.

[LiberalBuster]

>>Point of order... Mr. Ayala.....why hasn't evolution 
>>allowed mother's birth canals to develop large enough for 
>>the increased brain size?

Uh, because natural processes aren't perfect. What's God's excuse for screwing it up?

[gore3000]

Point of order... Mr. Ayala.....why hasn't evolution allowed mother's birth canals to develop large enough for the increased brain size?

One must also wonder how Mr. Ayala and most evolutionists were ever born. Their large empty heads surely should not fit.

[RnMomof7]

Point of order... Mr. Ayala.....why hasn't evolution allowed mother's birth canals to develop large enough for the increased brain size?

After 7 children my husband will tell you it has :>))