Gizmodo - Sally Davies bought a McDonald's Happy Meal on April 26, 2010. She placed it on her coffee table, uncovered, and took photos every day for six months. This video shows the results, which are quite scary.
180 days—and she says there were no worms, mold, smell, or visible decomposition of any kind.
Perhaps you have seen similar things before, but the fact that anyone can repeat this simple experiment, the fact that a burger and fries can survive through six months—including New York's fierce summer—is just scary and gross. Read more.