Mark Zuckerberg launched Facebook in 2004 By leeholbrook1 2005 October 2005 Facebook Adds Photos and Becomes International 2005 High School Students Accessed Facebook In 2005 2005 December 2005 Facebook had over 6 million users 2005 Zuckerberg turned down Yahoo for 1 billion dollars in 2005 2006 September of 2006 Anyone can Join Facebook 2006 April 2006 Facebook goes mobile