What is E=mc2

E=mc2 is one of the most famous equations in science, first written down by Albert Einstein, one of the most famous scientists in history. But what does the equation actually mean? Where does it come from, why is it do famous and how does it affect our every day lives? Twitter: https://twitter.com/UKAstroNut Website: http://www.ukastronut.co.uk Blog: http://ukastronutblog.blogspot.co.uk/ Credits: "Einstein 1921 by F Schmutzer - restoration" by Ferdinand Schmutzer - http://www.bhm.ch/de/news_04a.cfm?bid=4&jahr=2006 [dead link], archived copy (image). Licensed under Public domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Einstein_1921_by_F_Schmutzer_-_restoration.jp #mediaviewer/File:Einstein_1921_by_F_Schmutzer_-_restoration.jpg "Greater Cape Town 12.02.2007 16-41-31.2007 16-41-33" by Simisa - Own work Simisa (talk · contribs). Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Greater_Cape_Town_12.02.2007_16-41-31.2007_16-41-33.JP #mediaviewer/File:Greater_Cape_Town_12.02.2007_16-41-31.2007_16-41-33.JPG "Digi-keukenweegschaal1284" by Original uploader was Algont at nl.wikipedia - Originally from nl.wikipedia; description page is/was here.. Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Digi-keukenweegschaal1284.JP #mediaviewer/File:Digi-keukenweegschaal1284.JPG