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Politics : Evolution
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To: Brumar89 who wrote (1303)4/21/2006 11:58:54 AM
From: TigerPaw  Read Replies (1) of 69300
 
As an example:
The human eye has a blind spot since it develops from the inside out (exactly what would be expected if it formed from a light sensitive patch that ultimately curled in on itself). The proto-human eye would then have functioned like a pin-hole camera until a lens evolved from a thinning skin patch. The nerves carrying the signal have to "punch through" the back of the eye leading to a spot that has no receptors.

The octopus eye has no such problem. It's nerves run from the back of the receptors (exactly as if it's lens had started out as an underwater membrane covering a light sensative patch before it evolved to curl into a focusing shape.

One would expect a designer to use the best design, especially since the octopus design is older than the human one.

TP
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