The clock was moved to two and a half minutes in 2017, then forward to two minutes to midnight in January 2018, and left unchanged in 2019. It has been set backward and forward 24 times since, the farthest from midnight being 17 minutes in 1991, and the nearest being 100 seconds in 20. The clock's original setting in 1947 was seven minutes to midnight. The Bulletin 's Science and Security Board monitors new developments in the life sciences and technology that could inflict irrevocable harm to humanity. ![]() The main factors influencing the clock are nuclear risk and climate change. The clock represents the hypothetical global catastrophe as midnight and the Bulletin 's opinion on how close the world is to a global catastrophe as a number of minutes or seconds to midnight, assessed in January of each year. Maintained since 1947 by the members of the Bulletin of the Atomic Scientists, the clock is a metaphor for threats to humanity from unchecked scientific and technical advances. ![]() ![]() The Doomsday Clock is a symbol that represents the likelihood of a man-made global catastrophe. ![]() The Doomsday Clock pictured at its current setting of "100 seconds to midnight"
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