It was on 1 July 1858, 150 years ago today, that the idea of natural selection was first presented to the public in a joint reading of Darwin's and Wallace's papers at the Linnean Society of London

The Complete Work of Charles Darwin Online; free, includes items not in public domain
Works by Charles Darwin at Project Gutenberg; public domain
A Pictorial Biography of Charles
Darwin Correspondence Project: Text and notes for most of his letters
The Darwin Digital Library of Evolution
Institut Charles Darwin International
Twelve different portraits of Charles Darwin, National Portrait Gallery, U.K.
Mis-portrayal of Darwin as a Racist
Digitized titles by Charles Darwin in Botanicus.org
Charles Darwin at the Open Directory Project
On the Origin of Species by Means of Natural Selection: Free LibriVox Audiobook
Darwin Today - a joint initiative of Research Councils UK aimed at educating the public about evolution
Works by or about Charles Darwin in libraries (WorldCat catalogue)

Tags: anniversaries, history, links, nature, science