Since their first, devastating use back in 1945, nuclear weapons have been a huge source of anxiety and fear across the globe. For almost a century now, we’ve lived in the knowledge that our world leaders could plunge us into nuclear war with destruction on a scale never before seen in history. But how likely really is this scenario? What was the biggest nuclear weapon ever dropped? And how does a nuke even work anyway? Slip your HazMat suit on and brace yourself for impact, because you’re about to get hit with a fat knowledge bomb.