Why do onions make you cry?

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  • Highfield, Roger. "GM tear-free onion created by scientists." Daily Telegraph. Feb. 2,
  • 2008. (April 6, 2009)http://www.telegraph.co.uk/scienceandtechnology/science/sciencenews/3323954/GM-tear-free-onion-created-by-scientists.html
  • Hillman, Howard. "The new kitchen science." Houghton Mifflin Harcourt. 2003. (April 6, 2009)http://books.google.com/books?id=BCLT3hH84GoC
  • Library of Congress. "Why does chopping an onion make you cry?" Feb. 12, 2009. (April 6, 2009)http://www.loc.gov/rr/scitech/mysteries/onion.html
  • McNamee, Gregory. "Movable Feasts." Greenwood Publishing Group. 2007. (April 6, 2009)http://books.google.com/books?id=96wzC3B0TJUC
  • National Onion Association. "About Onions: Seasonality." (April 6, 2009)http://www.onions-usa.org/about/season.php
  • Norton, James. "Kitchen Science 101." Popular Science. Oct. 23, 2007. (April 7, 2009)http://www.popsci.com/scitech/gallery/2007-10/kitchen-science-101
  • Scott, Thomas. "What is the chemical process that causes my eyes to tear when I peel an onion?" Scientific American. Oct. 21, 1999. (April 6, 2009)http://www.sciam.com/article.cfm?id=what-is-the-chemical-proc

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