Many years later back in London, Darwin looked at his data again and began to develop an explanation, and that explanation was the theory of natural selection.
سالها بعد كه به لندن برگشت دوباره به داده ها نگاهی انداخت و شروع به طرح يك توضيح كرد، توضيحی كه نظريه انتخاب طبيعی شد.