I think we often forget just how terrifying nuclear weapons actually are. They may be fun to see used in films, but never in reality. The two bombs dropped Hiroshima and Nagasaki remain the only ever nuclear devices used in warfare and, as anyone who has taken high school history knows, the results were beyond catastrophic. Tens of thousands of people died from the blasts alone, with many tens of thousands more dying from radiation years later. Exact numbers are uncertain, but estimates state that about 80,000 and 40,000 people were killed by the explosions at Hiroshima and Nagasaki, respectively.