Try using just 4% of your brain and you will be able to figure out that an organ as costly as the brain will not be permitted by evolution to sit idle. (See Electric Fetus's post.) I'm not going to do you the dishonour of looking up some google refrences for you on the topic. I am sure you can do that yourself. However, rest assured the 'only use 10% of our brain' is the purest nonsense. Can I suggest that someone with the name Science Man needs to be a little more cynical and questioning about what they read and here.