ナショナルジオグラフィックのインスタグラム(natgeo) - 2月13日 00時21分

Happy Birthday Charles Darwin. Darwin's collection of these small brownish ground finches from the Galapagos were later found to represent more then a dozen new species, differentiated only by their feeding patterns, various sizes and shapes of their beaks. Research shows that the difference between survival and death is the beaks ability to reach for certain seeds which can be as small as half a millimeter. @Robert Clark #darwinism #evolution #darwinsbirthday #thebeakofthefinch

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