Mark Zuckerberg was born in 1984 in White Plains, New York. He studied computer science and psychology at Harvard where he created Facemash, a site comparing photos of students, and later TheFacebook which started as a Harvard-only social network. Zuckerberg expanded TheFacebook to other colleges with his friends and moved to California in 2004. Facebook gained popularity and users rapidly, reaching 500 million users by 2010. Zuckerberg remains CEO and Chairman of Facebook, which he has grown into a global social media platform with over 1.44 billion monthly active users.