21 March 2006 March 20, 2021 Author: Staff The social media site Twitter is founded. Famous Words of Inspiration..."By associating with wise people you will become wise yourself." Menander — Click here for more from Menander Related posts: 21 March 2006 15 July 2006 15 July 2006 4 February 2004 15 July 2006 15 November 2006 4 February 2004 4 February 2004 11 March 2006 10 March 2006 Categories: History Tags: 2006, 21 March