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Testing the 'Five-Second Rule' on Dropped Food

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Testing the 'Five-Second Rule' on Dropped Food

Science

Testing the 'Five-Second Rule' on Dropped Food

Testing the 'Five-Second Rule' on Dropped Food

  • Download
  • <iframe src="https://www.npr.org/player/embed/1437387/1437388" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Chicago high school student Jillian Clarke tests the "five-second rule" — the theory that food dropped on the floor is still safe to eat if it's snatched up promptly. She finds that bacteria adheres to food almost immediately. Hear Clarke and NPR's Scott Simon.