Do you remember when Dr. Sheldon Cooper of the Big Bang Theory told his citizens inside the United Kingdom to 'Keep Calm'? Sheldon moved his people and soothed their souls with the 'soft kitty' song during the Luftwaffe and V2 Rocket attacks. I think that's what happened anyways or at least that is what is implied by the 100% cotton Big Bang Theory Keep Calm and Bazinga T-Shirt! The Big Bang Theory Keep Calm and Bazinga T-Shirt features the popular British propaganda slogan with just a dash of Big Bang Theory. That's the proper amount of history, right?