Everybody knows the rule. If you drop food on the floor, you have five seconds to pick it up before it gets nasty and contaminated with germs.
But is that rule really safe?
Researchers at Clemson University decided to test out the theory by dropping bologna on surfaces which had been contaminated with salmonella.
They found that even if the bologna was picked up within five seconds, it still had enough salmonella microbes on it to make you sick. If it was picked up after one minute, it had about 10 times as many microbes.
So quicker is better, but before you eat it you may want to think about how clean the floor really is and how much you really want that bologna.