Doomsday scenarios

thumb|300px|Early in the COVID-19 pandemic, [[convention centers (pictured here) were deemed to be ideal sites for temporary hospitals, due to their existing infrastructure (electrical, water, sewage). Hotels and dormitories were also considered appropriate because they can use negative pressure technology.]]

World War III, also known as the Third World War, is a hypothetical future global conflict subsequent to World War I (1914–1918) and World War II (1939–1945). It is widely predicted that such a war would involve all of the great powers, like its two predecessors, and the use of nuclear weapons or other weapons of mass destruction, thereby surpassing all prior conflicts in scale, devastation, and loss of life.

Transhumanism is a philosophical movement that advocates the enhancement of the human condition by developing and making widely available new and future technologies to enhance longevity, cognition, and well-being. Influenced by seminal works of science fiction, the transhumanist vision of a transformed future humanity has many supporters and detractors from a wide range of perspectives, including philosophy and religion. Some critics argue that transhumanism amounts to little more than a "rebranding" of eugenics.

symbol which represents the likelihood of a man-made global catastrophe

class of computer bugs related to dates beginning in the year 2000

[[File:Supervolcano World Map.png|thumb|upright=1.5|World map of known VEI 7 and VEI 8 volcanoes

temperature anomaly event caused by a volcanic eruption

hypothetical end-of-the-world scenario

fall or disintegration of complex human societies, involving causative factors such as natural disasters, environmental change, depletion of resources, unsustainable complexity, decay of social cohesion, rising inequality, and loss of creativity

intervals in the Earth's past

hypothesis that artificial general intelligence could result in human extinction

hypothetical scenario in which AI becomes the dominant form of intelligence on Earth

hypothetical object capable of destroying all life on a planet

probabilistic argument that claims to predict the number of future members of the human species given an estimate of the total number of humans born so far

result of a very large volume eruption of basalt lava

predicted dates of the end of the world

A hypercane is a hypothetical class of extreme tropical cyclone that could form if sea surface temperatures reached approximately , which is warmer than the warmest ocean temperature ever recorded. Such an increase could be caused by a large asteroid or comet impact, a large supervolcanic eruption, a large submarine flood basalt, or "incredible" global warming. There is some speculation that a series of hypercanes resulting from the impact of a large asteroid or comet contributed to the demise of the non-avian dinosaurs. The hypothesis was developed by Kerry Emanuel of MIT, who also coined the

A strangelet (pronounced ) is a hypothetical particle consisting of a bound state of roughly equal numbers of up, down, and strange quarks. An equivalent description is that a strangelet is a small fragment of strange matter, small enough to be considered a particle. The size of an object composed of strange matter could, theoretically, range from a few femtometers across (with the mass of a light nucleus) to arbitrarily large. Once the size becomes macroscopic (on the order of meters across), such an object is usually called a strange star. The term "strangelet" originates with Edward Farhi a

Orbit to planetary surface attack with inert projectiles

hypothesis of past geologically rapid shifts of the earth's axis rotation and poles

philosophical and social movement advocating for a pro-technology stance that seeks to maximize the probability of a technocapital singularity

scenario in which human civilization experiences catastrophic events due to climate change

essay by Martin Rees

series of secondary extinctions

discussion of scenarios for a collapse of civilization due to climate change