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An average adult person's brain is about 3lbs 5oz: that is roughly 2% of the whole body weight, and uses around 20% of oxygen intake. Do you want to maximize the use of your brain?. If your answer is yes, then you have bought the perfect book for yourself.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.