first image: Darwin's Study at Down House.
second image: part of his bird collection
Thursday, February 12 would be Darwin's 200th birthday and 2009 is the 150th anniversary of his "On the Origin of Species." Double reasons to celebrate.
These images are from an exhibition in his honor at Down House in Kent.
"It was his observations of birds - notably the differences in finch populations in the Galapagos islands - that gave Darwin the scientific grounds for his theory of evolution."
More on Darwin in the Guardian. Also, the NY Times has extensive coverage here. And the New Scientist.
** Update 2/12/09 4:14am: My favorite, Verlyn Klinkenborg on Darwin (NY Times).