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Many hypothetical doomsday devices are based on salted hydrogen bombs creating large amounts of nuclear fallout.. A doomsday device is a hypothetical construction — usually a weapon or weapons system — which could destroy all life on a planet, particularly Earth, or destroy the planet itself, bringing "doomsday", a term used for the end of planet Earth.
One minute to midnight on the Doomsday Clock is heavily referenced in the grime/punk crossover song "Effed" by Nottingham rapper Snowy and Jason Williamson of Sleaford Mods. Because of the track's political content, there was an initial reluctance from mainstream radio stations to play the track before the 2019 United Kingdom general election .
Paul Davies, How to build a time machine, 2002, Penguin popular science, ISBN 0-14-100534-3 gives a very brief non-mathematical description of Gott's alternative; the specific setup is not intended by Gott as the best-engineered approach to moving backwards in time, rather, it is a theoretical argument for a non-wormhole means of time travel.
The group declared that the Doomsday Clock stood at 100 seconds to midnight — the closest the world has ever been to catastrophe since the clock was created in 1947. Nuclear threats and what ...
The Doomsday Clock has moved closer to midnight than it has ever been, and is now just 90 seconds away from striking 12, scientists have said. ... the world has entered a time of nuclear danger ...
A global catastrophic risk or a doomsday scenario is a hypothetical event that could damage human well-being on a global scale, [2] even endangering or destroying modern civilization. [3] An event that could cause human extinction or permanently and drastically curtail humanity's existence or potential is known as an " existential risk ".
The Doomsday Clock is a symbolic clock: a metaphor for how close humanity is to self-annihilation, according to the Bulletin of the Atomic Scientists.
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