20 years passed between Darwin's return from his voyage on the Beagle and the publication of The Origin of Species. In the interim, Darwin filled several notebooks with his thoughts and sketches. Author Niles Eldredge scours these notebooks in search of the moment when Darwin became an evolutionist. Don't miss the Darwin touring exhibition, opening at The Field Museum in June 2007.

256 pages.
Hardcover.
9.75" x 7.25".