Who has the oldest hamburger?

The question is almost becoming a game.  It was triggered by a claim of a Utah man that he has a 14-year-old hamburger from McDonald's.  David Whipple purchased the hamburger on July 7, 1999, or at least he has an appropriate receipt for that day.  The story he tells makes sense, particularly if you are somewhat forgetful. 

Whipple's burger is not the only reported ancient one. A New York City artist, Sally Davies,  posts a new picture every day to her Flickr account of the same burger and fries from a Happy Meal.  Karen Hanrahan blogs about her 1996 burger.

McDonald's says that there are no preservatives in their burgers.  This is probably true as scientists agree that under certain conditions food can age for years.

Hat tip to our Florida correspondent.