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Author Topic:   How can evolution explain body symmetry?
arachnophilia
Member (Idle past 1374 days)
Posts: 9069
From: god's waiting room
Joined: 05-21-2004


Message 64 of 284 (112354)
06-02-2004 8:13 AM
Reply to: Message 6 by CrackerJack
05-30-2004 11:26 PM


dunno if this has been pointed out before.
know someone who has one extra digit on their right hand, but only the normal five on their left. The same with his mother, grandfather, etc. back through his family history. So his body is not symmetrical.
so from your earlier argument, your friend could not have been intelligently designed.
These sorts of mutations that cause asymmetry are quite common, so why haven't many such asymmetries propagated throughout the history of evolution?
answer: THEY ARE.
take a picture of yourself looking STRAIGHT into a camera. cut the photo in half in some photoshop-like program, and make two pictures. one of only right sides, and one of only left. compare.
human beings are not symmetrical.
if you want to go farther, take an anatomy class. we have three lobes on one lung, two on the other. our heart is offset to one side. in fact, MOST of our internal organs are assymetric, including the brain.
studies have also shown that people rate perfectly symmetrical images of people (photoshopped as above) as more attractive than asymmetric ones. therefor, symmetry is a property selected for, via natural selection.

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arachnophilia
Member (Idle past 1374 days)
Posts: 9069
From: god's waiting room
Joined: 05-21-2004


Message 73 of 284 (113757)
06-09-2004 3:02 AM
Reply to: Message 67 by crashfrog
06-02-2004 2:40 PM


There's no advantage to an upside-down retina.
isn't that statement more in favor of "stupid design" ?
i think should propose that theory, that some finitely-wise demi-god designed everything, badly.

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arachnophilia
Member (Idle past 1374 days)
Posts: 9069
From: god's waiting room
Joined: 05-21-2004


Message 185 of 284 (223661)
07-13-2005 7:15 PM
Reply to: Message 184 by methylase
07-11-2005 2:01 PM


Flagellum is not irreducibly complex. Blood clotting mechanism is anything but irreducibly complex. Human immune system is not irreducibly complex.
another key point of invalid logic is that evolution cannot produce systems that are irreducibly complex. it's just an assumption that they make, and it's actually just, well, wrong. it's actually something of a predicted result of evolution, along with vestigal organs and the like, and is caused by scaffolding and redundant systems. so even stuff that they find that actually is ic (by their definition) is not really a problem.
(catch that ID'ers? ic is proof of evolution)

אָרַח

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