As you may have already heard the world is on the brink of nuclear armageddon. OK, so that may be a little hyperbolic, but North Korea and the United States are both sabre-rattling right now.

North Korea hates the United States and everything it stands for, and is threatening to launch a nuclear missile on Guam. Donald Trump wants to fight fire with fire.

This video is a rather timely look at the evolution of nuclear weapons, especially the size of the warheads. The current weapons make those dropped on Japan in 1945 look like small fry.

For over 70 years now the threat of mutually assured destruction has prevented anyone from launching a nuclear weapon. Let’s just hope that remains the case into the future.