Evolution
Posted: Sun Oct 13, 2013 6:29 am
OK, now the big bugaboo. What exactly is "the theory of evolution?"
First, evolution isn't a theory. It's an observed fact. The theory is why it occurs. This is apparent from the full name: The Theory of Evolution by Natural Selection.
Evolution has been observed in moths hiding on English birches, which over time became smudged with soot from industrialization and home heating, during which the moths changed from light with dark spots to dark with white spots. Evolution has been observed in fruit flies, and mosquitoes. Most significantly, "ring species," which surround some mountains, start on one side of the mountain, and expand out both ways; when they meet on the far side of the mountain they can no longer interbreed. They've evolved. The flies have become immune to the no-pest strip. The flesh-eating bacteria have become immune to the antibiotic.
The theory, then, is the theory of natural selection. In essence this means that those whose characteristics give them an advantage breed more than those whose characteristics do not.
Now the question here is, how is this arbitrary set of characteristics selected by circumstance, by "nature," i.e. "nature-al selection," if you will, any different from the random arbitrary set of characteristics (eye color, ear shape, tail length or shortness, mouse-catching ability) selected for in cats, wittingly or unwittingly, by humans who befriend, feed, and encourage them? What's the difference between the arbitrary "natural" constraints imposed by an advance in a predator, or a pest control technique, and arbitrary "purposeful" constraints that encourage different-colored eyes in purebred Malemutes, imposed by humans over time? I just don't get why anyone thinks these are different.
First, evolution isn't a theory. It's an observed fact. The theory is why it occurs. This is apparent from the full name: The Theory of Evolution by Natural Selection.
Evolution has been observed in moths hiding on English birches, which over time became smudged with soot from industrialization and home heating, during which the moths changed from light with dark spots to dark with white spots. Evolution has been observed in fruit flies, and mosquitoes. Most significantly, "ring species," which surround some mountains, start on one side of the mountain, and expand out both ways; when they meet on the far side of the mountain they can no longer interbreed. They've evolved. The flies have become immune to the no-pest strip. The flesh-eating bacteria have become immune to the antibiotic.
The theory, then, is the theory of natural selection. In essence this means that those whose characteristics give them an advantage breed more than those whose characteristics do not.
Now the question here is, how is this arbitrary set of characteristics selected by circumstance, by "nature," i.e. "nature-al selection," if you will, any different from the random arbitrary set of characteristics (eye color, ear shape, tail length or shortness, mouse-catching ability) selected for in cats, wittingly or unwittingly, by humans who befriend, feed, and encourage them? What's the difference between the arbitrary "natural" constraints imposed by an advance in a predator, or a pest control technique, and arbitrary "purposeful" constraints that encourage different-colored eyes in purebred Malemutes, imposed by humans over time? I just don't get why anyone thinks these are different.