I have a short question. When people refer to modern 'Nuclear War', what type of Bomb is it that is supposedly supposed to end the world were such a war to happen? I was looking up some different types and came across 'Tsar Bomba' a hydrogen bomb (The strongest type of nuclear bomb?) known as the king of bombs, the strongest nuclear weapon ever detonated.
I recall hearing that in modern times, all you would need to destroy the earth would be 3 nukes fired around the world in certain places. I read when researching a bit that it would actually take more. My question, the nukes that are available now, are they stronger than Tsar Bomba and how many nukes would it take to destroy the earth?