It may be called fast food, but some of it has unbelievable longevity.

A New York woman says her McDonald's Happy Meal consisting of a hamburger and fries has showed no signs of decay after being left on her counter without being refrigerated.

Artist Sally Davies says she read an article about a 12-year-old hamburger and wanted to test the theory and see for herself if one could actually last that long without decaying.

"I went out and bought the burger and I brought it home. I put it from the bag onto a white China plate, which it's still on and I took a picture of it," she explained. "The meat patty shrank a lot as it dried out, and that's kind of it. It really hasn't changed."

Davies thinks preservatives in the food could be responsible for making the food appear unchanged.

McDonald's issued a statement saying that Davies' claims are false and that they work hard to keep mold, bacteria and other microorganisms from being exposed to their food.

When the London Daily Mail asked spokeswoman Danya Proud whether the company's food was biodegradable, she said, "This is nothing more than an outlandish claim and is completely false."

Davies says she just wants people to be aware of what they're eating. As for her artwork, the Happy Meal remains on the counter. Check back in about 10 years.