Darwin turned wholeheartedly to the problem of evolution

Darwin turned wholeheartedly to the problem of evolution -...

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Darwin turned wholeheartedly to the problem of evolution. Ever since his  Beagle  trip he  had been convinced that the difference between what naturalists called 'varieties' and  what they called 'species' was much less significant than previously thought. If pigeon  breeders could create varieties as different as pouters, runts, and fantails, what would  prevent nature from doing the same? And, given millions of years, wasn't it possible that  a pigeon could be turned into something so radically different we would no longer be  willing to call it a pigeon–or even a bird? Darwin was not the first to have these kinds of thoughts. Seventy years before, his  grandfather, Erasmus, had devoted a whole section of his book  Zoonomia  to the issue  of evolution. In 1844, Robert Chambers anonymously published his controversial book,  The Vestiges of the Natural History of Creation,
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