This article introduced me to the term "Megadeath". I've never really thought of that in terms of SI units. The scale of destruction that we have the potential

This article introduced me to the term "Megadeath". I've never really thought of that in terms of SI units. The scale of destruction that we have the potential to cause is simply horrifying. When you see pictures of Hiroshima/Nagasaki and then scale up to an H bomb and realise that those were simply tiny in comparison it's really rather sobering.