Historic Twitter tweets heard 'round the world[ Fri, 16 Apr 2010 19:38:23 GMT ]Up your tweets, kids! The U.S. Library of Congress is archiving every single character posted on Twitter since it first launched in March 2006. If you want yours to stand out between #justinbieber rocks and #justinbiebersucks, take a tip from these historic tweets on how to do it right.