This thought-provoking and rather eerie animation shows every nuclear explosion from 1945 up to 1998.
It begins slowly, but there's a sort of flash flood of detonations in the 1950s.....
Before you watch it, see if you can answer this question - where did the first nuclear explosion take place in Africa? (that's not including the natural nuclear reactions that took place in what is now Gabon, 2 billion years ago).
Hat-Tip: Andrew Sullivan