Who is Elon Musk? He became famous for starting Tesla Motors and SpaceX but he first made his fortune as a co-founder of PayPal. Musk provided a large amount of inspiration for the Hollywood character Tony Stark (a.k.a. Iron Man). In fact, parts of Iron Man 2 were actually filmed inside and outside of SpaceX. Musk even has a cameo in the film! Like Steve Jobs and other famous entrepreneurs, Musk's official annual salary for Tesla Motors is just $1. At age 12, Musk taught himself computer programming and created a video game called Blastar, which he sold for $500. Elon Musk didn't become an American citizen until 2002, at age 31. When Elon Musk was 17, he moved from South Africa to Canada. Eventually, he attended college in the U.S. at the University of Pennsylvania. After graduating, Musk moved to California in order to begin graduate school in physics at Stanford University. He left Stanford after just two days, deciding instead to ...