Originally named On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life, On the Origin of Species, by Charles Darwin, was first published in 1859. This scientific writing, which was considered to be the groundwork of evolutionary biology, presented the theory that species developed over a line of originations through a method of natural selection. It imparted evidence that the variety of life resulted from a common descent via a branching model of evolution. Darwin incorporated facts that he had collected on the Beagle mission in the 1830s and his succeeding findings from research, correspondence, and experimentation.
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