The human brain is estimated to have about a hundred billion nerve cells, two million miles of axons, and a million billion synapses, making it the most complex structure, natural or artificial, on earth. Tim Green More Quotes by Tim Green More Quotes From Tim Green Let's face it, you have to have a slightly recessive gene that has a little something to do with the brain to go out on the football field and beat your head against other human beings on a daily basis. Tim Green nfl brain football