Does it really stay in your body for seven years?
Remember being told, probably when you were at school, that if you swallowed a piece of chewing gum it would stay in your body for seven years?
The news would have been delivered with grim authority by a classmate, possibly the same classmate who told you their brother had seen a UFO.
But is there any truth in it? Well, the American Chemical Society have investigated into the myth in the video below.