The spectre of a nuclear war 60 years ago was what created the "doomsday clock," the Bulletin of the Atomic Scientists'(BAS) cold war chronometer. The closer the clock to midnight, the closer the world was creeping toward disaster.
These days, the superpower polarisation of the world may be gone, but the threat of nuclear conflict remains. And added to that, a new doomsday force is moving the clock hands: global warming.
