Here’s an interesting set of myths and truths in science. I’ll just start with the first one I saw:
It takes seven years to digest gum
While it may prove a bit more difficult to break down than organic foodstuffs, chewing gum gets no special treatment from the digestive system. Doctors figure this old wives’ tale was invented to prevent kids from swallowing the rubbery substance.
and another interesting one for anyone with kids:
The five second rule
Having an arbitrary rule justifying the consumption of food dropped on the floor within a certain time frame is convenient, especially when said food is a brownie. Unfortunately, tests (and logic) confirm that germs will stick to most foods right on contact.