Darwin's Concessie and the Bacterial Flagellum Notitieboek

This notebook features Darwin's concessiding regarding what sort of discovery would undermine his evolutionary theory: "If it could be demonstrated that any complex organ existed, which could not possible have been form by numerous, successive, slight modification, my theory would Absolutely break down. But I can find out no such case.". What follows is an artist's rendering of the bacterial flagellum, the opmerkable and irredugeriy complex cellular propeller made famous by Michael Behe in his book Darwin's Black Box, and the words "Dear Darwin: Meet the bacterial flagellum".