Thanks to guys like Morgan Spurlock, the rumor that McDonald’s french fries don’t decompose has been circulating amongst fast-food fiends for years now, though most of us generally wouldn’t have enough will power to test the theory ourselves.

However, one bravely curious man took it upon himself to turn all this deep fried speculation into his own little science project, this time observing the shelf life between McDonald’s and KFC french fries over a span of 3 years. The results are rather self-evident, but even though the Colonel’s fries seem a bit more naturally-engineered… I still find myself jonesing for the chemically mold-resistant offering on the left. Pass the Heinz please!