Hey Russell2
I’m not sure I can agree with RazD that RussTolution is dead as that would imply that it ever had life and I don’t believe that is true.
It was a tongue in cheek comment (the king is dead, long live the king), and creationist arguments seem to have a life of their own no matter how bad they are.
Look up HOX gene’s Russ T. Sorry RazD I think you have this one wrong. Gene’s do not conatin a description of a left eye and a separate descriptiton of a right eye. DNA contains a blueprint (of sorts) for an eye and a command to build one in the appropriate place facing this way and a second one facing that way.
Yes, the first part is duplication of parts - so radial symmetry is easy - and the second part is adaptation to bilateral symmetry. Nor is the symmetry "perfect" nor even complete: we have a dominant side for every paired feature and there are many non-paired elements (internal organs).
Science 25 June 1999: Vol. 284. no. 5423, p. 2108 DOI: 10.1126/science.284.5423.2108
Test Tube Evolution Catches Time in a Bottle by Tim Appenzeller
And the creationist eyes quickly scan down to where this section ends before again reading the context ... they have evolved to ignore dangerous information ...
Other animals have eye’s that have the light sensitive surfaces of their eye’s facing the incoming light, that have their blood and nerve supplies attached from the back and so have much higher visual acuity than we do along with the advantages of no blind spots and a well attached retina thus avoiding the problems that detached retinas cause to so many humans.
The octopodae also focus their eyes differently, they reshape the eyeball to move the retina to where the image is focused rather than deform the lens to change the focal length to where the retina is, as mammal eyes do. If you combined those two systems you could have a zoom lens capability.
Enjoy.
