Leadpile Lead Exchange would like to wish Facebook a Happy 5th birthday. According to the Valley Wag website, Facebook originated on the campus of Harvard University. Eventually, the social networking site went from one university to universities all across the nation. Presently, Facebook is not just used by university students as a social networking site, it is used by more than 1.5 million people (including Leadpile Lead Exchange). HAPPY BIRTHDAY Facebook!