USATODAY.com - Deciphered chicken genome sheds light on human DNA: "Not surprisingly, chickens were found to lack any version of the human genes for milk, saliva and tooth enamel. These genes were, as the scientists put it in a presentation for reporters, as rare as hen's teeth. Unfortunately, the new analysis shed no light on a mystery that has long bedeviled humanity: Why does the chicken cross the road? 'That question,' Wilson observed in an interview, 'is still out there to be answered.'"