The Doomsday Clock is a symbol which represents the likelihood of a man-made global catastrophe. This clock face showing “Minutes to Midnight” in this case, Midnight is an event that could be happen in the future which endanger the very existence of humanity (an event that can cause the end of humanity). Nuclear risk and Climate change are the main factors that Influence, how much we are close to “Midnight”.  This clock is Maintained by the Bulletin of the Atomic Scientists since 1947.

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Visuals from thebulletin.org. Visit the  thebulletin.org  for full details.