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  2. Category:Doomsday scenarios - Wikipedia

    en.wikipedia.org/wiki/Category:Doomsday_scenarios

    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.

  3. Global catastrophe scenarios - Wikipedia

    en.wikipedia.org/wiki/Global_catastrophe_scenarios

    The worst-affected city would likely be Billings, Montana, population 109,000, which the model predicted would be covered with ash estimated as 1.03 to 1.8 meters thick. [ 184 ] The main long-term effect is through global climate change, which reduces the temperature globally by about 5–15 °C for a decade, together with the direct effects of ...

  4. List of dates predicted for apocalyptic events - Wikipedia

    en.wikipedia.org/wiki/List_of_dates_predicted...

    Belief in the apocalypse is most prevalent in people with lower levels of education, lower household incomes, and those under the age of 35. [ 9 ] [ 10 ] In the United Kingdom in 2015, 23% of the general public believed the apocalypse was likely to occur in their lifetime, compared to 10% of experts from the Global Challenges Foundation .

  5. National Response Scenario Number One - Wikipedia

    en.wikipedia.org/wiki/National_Response_Scenario...

    National Response Scenario Number One is the United States federal government's planned response to a small scale nuclear attack. [1] It is one of the National Response Scenarios developed by the United States Department of Homeland Security , considered the most likely of fifteen emergency scenarios to impact the United States .

  6. Global catastrophic risk - Wikipedia

    en.wikipedia.org/wiki/Global_catastrophic_risk

    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 ".

  7. Gray goo - Wikipedia

    en.wikipedia.org/wiki/Gray_goo

    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]

  8. ExitMundi.nl - Wikipedia

    en.wikipedia.org/wiki/ExitMundi.nl

    In May 2008, a rewritten selection of 50 end-of-world scenarios was published as a book by AW Bruna in the Netherlands: Exit Mundi, het einde van de wereld. De beste 50 scenario's . The book takes the formula of the website to the extremes: the scenarios are more carefully researched, and written with even more puns than the website.

  9. Doomsday argument - Wikipedia

    en.wikipedia.org/wiki/Doomsday_argument

    Assume, for simplicity, that the total number of humans who will ever be born is 60 billion (N 1), or 6,000 billion (N 2). [6]If there is no prior knowledge of the position that a currently living individual, X, has in the history of humanity, one may instead compute how many humans were born before X, and arrive at say 59,854,795,447, which would necessarily place X among the first 60 billion ...