Charles Darwin noticed that each finch species had a different type of beak, depending on the food available on its island.
Darwin studied different types of finch species on the Galapagos Islands. During the study, he noticed that each finch species had a different type of beak on different Islands. This variation in beak types was as a result on the food available on its island.
From Darwin research, he found that many species had differences depending on the island they lived.
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