I would like to put my queries in the form of quesitons: 1- Why are there differences in the intelligence level of people? Why is some person a genius and other a dumb of below-average intelligent? 2- Is it possible to improve the memory? 3- Is it possible to increase the brain usage? What effects the brain usage and memory? I've heard something about "Threads in brain". What's this all about. I hope medical fellows can help on it. Answers in details would be higly appreciated. Thanks.