Charles Darwin's research in the Galapagos Islands experienced a significant breakthrough when he discovered 13 different kinds of finches whose beaks varied in size.

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This statement is true. Charles Darwin did indeed discover 13 different kinds of finches in the Galapagos Islands, and he observed that their beak sizes varied depending on the food sources available on each of the different islands. This observation became a major piece of evidence supporting his theory of evolution through natural selection.

Charles Darwin's Research in the Galapagos Islands Experienced a Significant