The Riddle of the Appendix - New York Times
http://www.nytimes.com/2005/08/09/science/09case.html?ei=5090&emc=rss&en=3040a92e0f5a9848&ex=1281240000&partner=rssuserland
"I was grateful that we have not only inherited a danger-prone appendix, but a brain that can invent surgery."