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Doomsday scenarios are possible events that could cause human extinction or the destruction of all or most life on Earth (a "true" or "major" Armageddon scenario), or alternatively a "lesser" Armageddon scenario in which the cultural, technological, environmental or social world is so greatly altered it could be considered like a different world.
Scenarios in which a global catastrophic risk creates harm have been widely discussed. Some sources of catastrophic risk are anthropogenic (caused by humans), such as global warming, [1] environmental degradation, and nuclear war. [2] Others are non-anthropogenic or natural, such as meteor impacts or supervolcanoes.
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 ".
This is an accepted version of this page This is the latest accepted revision, reviewed on 1 February 2025. This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. The Last Judgment by painter Hans Memling. In Christian belief, the Last Judgement is an apocalyptic event where God makes a final ...
Climate apocalypse – Term to describe possible catastrophic events due to climate change; Climate Clock – Public countdown of time until 1.5°C of global warming; DEFCON – Alert posture used by the United States Armed Forces; Doomsday device – Construct which could destroy all life on a planet or a planet itself
The April 30, 2011 document was written as part of a fictional training scenario for junior officers undergoing training in JOPES, the DoD's contingency planning system and for strategic training. [ 2 ] [ 4 ] [ 1 ] United States Strategic Command instructors found that a "zombie survival plan" made for "a very useful and effective training tool ...
Maarten Keulemans launched the website in 2001 strictly for fun. In several interviews, he points out that the main reason for launching the site was that as a professional science journalist, he came across many apocalyptic scenarios, ranging from well-known disasters like black holes and supervolcanoes to less well-known events like the Big Crunch or mass suicide.
Gray goo (also spelled as grey goo) is a hypothetical global catastrophic scenario involving molecular nanotechnology in which out-of-control self-replicating machines consume all biomass (and perhaps also everything else) on Earth while building many more of themselves, [1] [2] a scenario that has been called ecophagy (the literal consumption of the ecosystem). [3]