Nuclear weapons are already scary enough, but when you dig deeper and find out how powerful the weapons truly are, they get even more terrifying. The weapons we’ve built after the first atomic bombs are so strong that you can basically use Hiroshima as a unit of measurement. The largest nuclear explosion in human history, the Tsar Bomba, detonated with a force of 50 megatons or the power of 3,333 Hiroshimas.