Flies are attracted to glycerol, a chemical in beer produced during fermentation. Understanding more about the genes responsible for taste and smell in flies could help make powerful insect repellents. iStockphoto.com hide caption

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Isabella Colbdorf feeds salad to a turkey at this year's Feeding of the Turkeys ceremony in Watkins Glen, in upstate New York, on Nov. 20, 2011. Emma Jacobs/WRVO hide caption

itoggle caption Emma Jacobs/WRVO

Narragansett and Standard Bronze heritage breed turkeys browse at a farm in Westport, Mass. Stephan Savoia/AP hide caption

itoggle caption Stephan Savoia/AP

A jury member feels a piece of duck foie gras during a contest of local producers and producers from southwestern France. BOB EDME/ASSOCIATED PRESS hide caption

itoggle caption BOB EDME/ASSOCIATED PRESS

Racing pigeons are bred to be stronger, smarter and have better endurance than normal pigeons. Patrick Skahill hide caption

itoggle caption Patrick Skahill