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FYI, the "5-second rule" says that if you drop food on the floor and pick it up within five seconds, you can still eat it.

It's a running joke and there is no scientific evidence for it. If there are harmful contaminants where the food falls they will transfer to the food as soon as it touches them (due to the electrostatic effect).

If the food is moist, contaminants will transfer more easily because water is a polar molecule and readily adheres to other molecules.

(and you thought this video had nothing to do with STEM?)