Charles Robert Darwin (February 12, 1809 - April 19, 1882) was an English naturalist who is best known for his theory of evolution by natural selection. In December 1831, Darwin, having no formal scientific training, set sail on the H.M.S. Beagle working as an unpaid naturalist. This experience inspired Darwin to develop his theory of natural selection, which was published in 1859 as The Origin of the Species by Means of Natural Selection. This publication changed the course of scientific and biological thought and have greatly advanced modern scientific understanding.
Darwin Online is a comprehensive wesite containing over 212,000 pages of searchable text and 220,000 electronic images. The website also provides the largest collection of Darwin's private papers and manuscripts.