The Doomsday Clock is a symbol that represents the likelihood of a human-made global catastrophe, in the opinion of the members of the Bulletin of the Atomic Scientists. Maintained since 1947, the clock is a metaphor for threats to humanity from unchecked scientific and technological advances. A hypothetical global catastrophe is represented by midnight on the clock, with the Bulletin's opinion on how close the world is to one represented by a certain number of minutes or seconds to midnight, assessed in January of each year. The main factors influencing the clock are nuclear risk and climate change. The Bulletin's Science and Security Board monitors new developments in the life sciences and technology that could inflict irrevocable harm to humanity. The clock's original setting in 1947 was seven minutes to midnight. It has since been set backward eight times and forward 17 times for a total of 25.
Apocalypticism - Apocalypticism is the religious belief that the end of the world is imminent, even within one's own lifetime. This belief is usually accompanied by the idea that civilization will soon come to a tumultuous end due to some sort of catastrophic global event.
The Bomb (film) - The Bomb is a 2015 American documentary film about the history of nuclear weapons, from theoretical scientific considerations at the very beginning, to their first use on August 6, 1945, to their global political implications in the present day.
Climate apocalypse - A climate apocalypse generally denotes a predicted scenario involving the global collapse of human civilization and potential human extinction as either a direct or indirect result of anthropogenic climate change.
Climate Clock - The Climate Clock is a graphic to demonstrate how quickly the planet is approaching 1.5 °C of global warming, given current emissions trends. It also shows the amount of CO₂ already emitted, and the global warming to date.
DEFCON - The defense readiness condition is an alert state used by the United States Armed Forces. The DEFCON system was developed by the Joint Chiefs of Staff and unified and specified combatant commands. It prescribes five graduated levels of readiness for the U.S. military.
Eschatology - Eschatology concerns expectations of the end of the present age, human history, or of the world itself. The end of the world or end times is predicted by several world religions, which teach that negative world events will reach a climax.
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