William J. Sidis (April 1, 1898 – July 17, 1944) was a formidable mathematical and linguistic child prodigy who (according to his sister) had the highest IQ ever recorded, could read at 18 months, was admitted to Harvard at 11 years of age (his father had tried to have him admitted when he was 9, but his application was rejected because William was too young), and graduated at 16 cum laude. He also spoke between 25 and 40 languages. He could already speak 8 languages at 8 years of age and had already invented his own language ("Vendergood"). He is remembered in particular for his book The Animate and the Inanimate (1925), in which he postulates the existence of dark matter, entropy and the origin of life in the context of thermodynamics. His writings, however, include many other subjects, like cosmology, American Indian history, Notes on the Collection of Transfers, as well as lost texts on anthropology, philology, and transportation systems. In spite of his incredible abilities, he soon withdrew from public life and even denied his intelligence. He told reporters that he wanted to live the perfect life, which to him meant living in seclusion, shortly after graduation. He then obsessively collected streetcar transfers, wrote self-published periodicals, taught small circles of friends his version of American history and stayed away from the limelight. He is believed to have had Asperger's Syndrome and is featured in Asperger’s Syndrome: A Gift or a Curse? by Michael Fitzgerald and Viktoria Lyons. Read more about this unique mind on his Wikipedia page.