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Darwin discovers finches and evolution
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confused by the geographical distribution of wildlife and fossils he collected on the voyage, Darwin began detailed investigations, and in 1838 conceived his theory of natural selection.
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Darwin married Emma Darwin on January 29, 1839.
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Darwin's book The Structure and Distribution of Coral Reefs on his theory of atoll formation was published in May 1842 after more than three years of work, and he then wrote his first "pencil sketch" of his theory of natural selection.
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On 5 September 1857, Darwin sent the American botanist Asa Gray a detailed outline of his ideas, including an abstract of Natural Selection, which omitted human origins and sexual selection.
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Darwin's book was only partly written when, on 18 June 1858, he received a paper from Wallace describing natural selection.
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Darwin dies