Ten Amazing Brain Facts + vision test videos
source: http://www.makeahistory.com/index.php/bizzareweird/193-ten-amazing-brain-facts
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What part of you is only 1% to 3% of your body's mass, yet uses 20% of all the oxygen you breathe? Your brain! Here are ten more brain facts + vision test videos ..... http://www.makeahistory.com/index.php/bizzareweird/193-ten-amazing-brain-facts