9. William Sidis
(the inspiration for the film "Good Will Hunting") was an American child prodigy whose IQ scores range from 250 to 300 by different measures. By the age of 2, Sidis was reading The New York Times and typing out letters on a typewriter – in both English and French. He was accepted to Harvard at the age of 9, but the university wouldn't let him attend due to his "emotional immaturity." He attended Tufts instead, until Harvard finally let him in when he turned 11. Reporters followed him everywhere, and he eventually became a recluse, moving from city to city under different names, to avoid the spotlight. He died at the age of 46 from a massive stroke.