William James Sidis, was an American child prodigywith exceptional mathematical and linguistic skills. He is notable for his 1920 book The Animate and the Inanimate, in which he postulates the existence of dark matter, entropy and the origin of life in the context of thermodynamics. He entered Harvard at age 11 and, as an adult, was claimed to have an extremely high IQ, and to be conversant in about 25 languages and dialects. Sidis could read The New York Times at 18 months. By age eight, he had reportedly taught himself eight languages (Latin, Greek, French, Russian, German, Hebrew, Turkish, and Armenian) and invented another, which he called "Vendergood". His IQ was around 255 to 300, when the IQ from a normal person is around 100 to 120. He's known to be the most intelligent man in the human history. Posted by Andrés Vásquez.