What happens to a hamburger after 137 days?

In the name of both art and science, New York photographer Sally Davies decided to buy a hamburger happy meal from McDonald's, set it out on a table, and take a picture of it every day until it disintegrated. That was 137 days ago and the end is nowhere near: The fries look as fresh as the day they came out of the fryer, and the burger — minus a little patty shrinkage — is virtually unchanged. More about the experiment:
http://newyork.grubstreet.com/2010/08/mcdonalds_hamburgers_almost_en.html

Source: http://newyork.grubstreet.com/