Nicholas Aicher, a senior quality control analyst, conducted a petri dish experiment to scientifically assess how quickly bacteria transfer to food dropped on the ground, reported the New York Post.

It had a natural antibacterial effect ... In 1928, he was straightening up a pile of Petri dishes where he had been growing bacteria, but which had been piled in the sink. He opened each one ...

A Chicago-based microbiologist has busted the five-second rule, proving floor contact instantly contaminates food.