William James Sidis, American mathematician and anthropologist (born 1898)

William James Sidis was an American child prodigy whose exceptional abilities in mathematics and languages made him one of the most famous intellectual prodigies of the early 20th century. Born to Boris Sidis, a prominent psychiatrist, and Sarah Mandelbaum Sidis, a physician, Sidis demonstrated extraordinary intellectual capabilities from infancy. Enrolled at Harvard University at age 11, he delivered a widely publicized lecture on four-dimensional geometry at age 12 and graduated cum laude in 1914 at 16.