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Politics : Evolution
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To: Brumar89 who wrote (1301)4/21/2006 11:49:15 AM
From: TigerPaw  Read Replies (1) of 69300
 
How is the claim that all changes have been due to natural causes tested?

First of all, don't confuse being tested with being exhaustively tested. Tests are more like a sampling poll than a check of every possible reaction that has taken place since the planet began. For example, you can be pretty sure that the salt in your shaker is primarily sodium-cloride without analyzing every grain because of the earlier tests done on the process.

What Darwin did was to show that supernatural causes for change were unnecessary. The natural causes are sufficent for all known changes.

There have been some specific tests. There was a proposal put out a few years ago for a trait which would not occur by natural means. The trait that was agreed upon was that of an organism with wheels. No natural mechansism was known that could support such a complete mechanical separation of one part of an organism from the rest. A literature-search was underway for any organism that had a wheeled characteristic and they actually found one. The exceptions are what really tests a proposition because the proposition must also adequately describe the loophole that allowed the exception to happen. In this case the exception was the flagella of certain bacteria which can turn all the way around like a wheel (or propellor). The explanation for the exception was in the tiny size of the flagella which allowed it to receive nutrients without a solid connection to the rest of the organism.

TP
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