AdvertisementMeet William James Sidis: The Smartest Guy Ever?January 23, 2011NPR StafffacebookEmailWilliam James Sidis, shown here in his 1914 graduation photo, received his degree from Harvard University at age 16. He qualified for admission when he was 9, but he was not invited to attend until age 11, when faculty thought he would be more mature, biographer Amy Wallace says. (Wikimedia Commons)