It has become an iconic anti-war symbol and one of the most powerful anti-war paintings in history. It shows the results of the casual practice bombing by Hitler's German air force, acting in support of General Francisco Franco during the Spanish Civil War, of the little village of Guernica, Spain on April 26, 1937.
Quick Answer. The normal maximum mouth opening (MMO) is approximately 48 millimeters for humans. The ability to position three fingers of either the left or the right hand in the mouth between the upper and the lower front teeth indicates normal size of the mouth. Continue Reading.
Yawning can also cause it and so can visits to the dentist where your mouth must be held open wide. One common form of this disorder is called internal joint derangement, which usually causes a clicking sound in the joint when the mouth opens wide or the jaw shifts from side to side.