19. Christopher Hirata,
a Child prodigy-turned-astrophysicist who has an IQ of 235, gained fame at age 13 by becoming the youngest winner at the 1996 International Physics Olympiad. One year later, he entered the California Institute of Technology. By age 16 he was working with NASA on a project investigating the colonization of Mars, and at 22 he received his PhD in physics from Princeton. He is a professor of physics and astronomy at Ohio State University.