Have you heard about the greatest disaster ever in the world? Earthquake, flood, eruption, these are some words that we often hear, but which one the greatest?The Biggest Disaster EverDamghan Earthquake, Iran (856 M)The earthquake that occurred on December 22, 856 M, it has 7.9 Richter Scale. Epicenter was at 320 KM from the city of Persia. The quake cost up to 200,000 deaths.Earthquake...