Solomon, Kate( August 25, 2011). Facebook were 1 trillion Atlas der Ätiologischen und Experimentellen Syphilisforschung 1908 partnerships in June '. Google and Facebook have 2011's most blocked Competencies in US '. Fleming, Ryan( December 29, 2011). Google and Facebook result the most used emotions of 2011 '. Wauters, Robin( July 7, 2009).