Was George Costanza Right? The Surprisingly Gross Science of Double-Dipping

Seinfeld turned double-dipping a chip into one of television’s funniest social crimes. But beneath the comedy was a surprisingly legitimate scientific question: does taking a second dip actually contaminate the bowl? Researchers have put the question to the test, and George Costanza probably would not have liked the results. The science suggests that Timmy’s outrage may have been more justified than we thought.