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Evolution is quicker than they thought
Samoan butterflies quickly evolve to avoid extinction .
It appears that evolution can take place much faster than the scientists realized before now.
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They said the butterflies' tale is the fastest example of natural selection observed to date and shows evolution can happen quickly when the stakes are high.
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"This is one of the most clear and fastest cases of evolution under natural selection," said Sylvain Charlat of University College London, whose study appears in the journal Science.
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What is clear, they said, is the repopulation of male butterflies illustrates rapid natural selection, a process in which traits that help a species survive become more prominent in a population.
Natural selection typically moves very slowly, sometimes over hundreds of years, they said, but when under severe attack, this process was accelerated.
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The more we know, the more we know we don't know.
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The descent of man ~ Nixon, Friedman, Reagan, Trump.
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