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Observed Natural Selection

The affects of natural selection have been well-documented in recent history. One such example is that of the peppered moth, which existed in a light and dark variety, and whose numbers changed along with levels of pollution in England during the Industrial Revolution. With low pollution, the trees on which these moths lived were light-colored, producing good camouflage, favoring light-colored moths. With high pollution, the trees were colored in dark soot, favoring dark-colored moths.