Is the 5-second rule true?

This excellent video by Vsauce takes a look at the golden rule many people believe when they drop food on the floor – that if you’re quick enough, you can pick up the food, eat it, and you’ll be fine. It’ known as the 5-second rule, or the 10-second rule, or to others – the 2-second rule.

Whatever time frame you follow – if any – is it true? And what’s the quickest you’d have to pick up your food to be safe? Watch the video below to explore the answer.