Questions tagged [apocalypse]

For questions dealing with events during an apocalypse scenario. Do not use for post-apocalyptic settings.

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3 votes
3 answers
133 views

How much attrition could human civilization survive? [closed]

The pandemic has demonstrated how even a small reduction in capacity can produce downstream disruptions in supply lines. The standard model for an apocalypse is that mankind's population drops below a ...
53 votes
8 answers
10k views

The Earth is teleported into interstellar space for 5 minutes. What happens?

Humanity has just developed a star drive and begun sending their first probes, and have now discovered an unstoppable force of doom approaching to destroy the solar system. Their only option is to ...
-1 votes
2 answers
105 views

What should an underground shelter, bunker or “regular” home look like if it’s designed to keep two people isolated for at least two years? [closed]

I’m asking this question because I was just thinking of how people would actually survive in the medium term in an apocalypse scenario with “reasonable and realistic” limits. The key world being ...
0 votes
1 answer
72 views

What are some things that could destory humanity? [closed]

I trying to think of ideas for the destruction of humanity/civilization that are not the usual (nuclear war, extreme viral/deadly disease, global warming, overpopulation, etc). Something that would be ...
1 vote
1 answer
130 views

A meteor falls in a Mediterranean-like sea: what is the impact?

A meteor with a diameter of 300 meters crashes into the middle of a circular sea with a radius of 1500 km and with a speed of 30 km/s. Civilizations (and humanity as a whole) that are situated around ...
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3 votes
5 answers
154 views

What would be the ideal date and time for a magical zombie apocalypse to occur to cause the most death and destruction?

An invisible eldritch entity has enveloped the entirety of modern planet Earth. As a result of this, any human who dies becomes a zombie. This is not spread by bites or anything like that, death of ...
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11 votes
17 answers
4k views

What could cause a small enough magical apocalypse?

In a world with spirit magic, what could cause a big enough magical accident to destroy a large city and devastate a wide area around it? Spirit Magic In this world, all things have a spirit and ...
5 votes
4 answers
779 views

population growth from a person alone [closed]

for context: an apocalypse has happened. Everyone dies with the exception of this one man. Assume that this man is able to stumble upon a cloning machine. Said machine can hold up to 10 babies. We ...
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3 votes
6 answers
581 views

Lightspeed organics eliminator?

Assume that 'Oumuamua was a Von Neumann Berserker, which, at the detection of civilization, triggered a bomb that exploded at lightspeed. From the perspective of Earth, due to the speed of the ...
3 votes
5 answers
150 views

How to write the initial robot apocalypse [closed]

I am currently planning a dark-humor story about the robot apocalypse (Mostly inspired by Robopocalypse and other robot uprising works, of course), and for a while, I’ve been struggling with just how ...
3 votes
3 answers
161 views

How would the general public be kept unaware of a zombie outbreak? [closed]

Consider a zombie outbreak beginning in March 2020 rather than the Covid-19 pandemic we have today. This pandemic has started intentionally by a secret world organization to lower down the human ...
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2 votes
1 answer
118 views

What Size and Likelihood Of An ET Impact Would Destroy A Small County Sized Region But Not Our Species?

Motivation The question is inspired by the astronomy journal preprint released publicly today, entitled: From impact refugees to deterritorialized states: foresighting extreme legal-policy cases in ...
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3 votes
5 answers
304 views

Most of Solar System is colonized but Earth dies with most of knowledge and technology. What the colonists may do to rebuild the civilization?

Suppose it happens some 250-300 years in the future. There are some (medium-sized) cities on Mars, settlements throughout Solar System, an interplanetary communications network, many orbital space ...
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1 vote
4 answers
1k views

In the event of a strategic nuclear war that somehow only hits Eurasia and Africa, would the Americas collapse economically or socially? [closed]

Let's say that there's a strategic nuclear war in Europe, Asia, and Africa - only - and does not involve nuclear weapons hitting Australia, the Americas, the Pacific islands, etc. What would the ...
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1 vote
6 answers
181 views

How could a world empire prevent rebellions with minimal bloodshed?

In the world I've thought of, monstrous beings more or less ended civilization on my planet. From the fires of this apocalyptic event, the world empire arose. It took over territory either by force or ...
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2 votes
1 answer
123 views

Forest fires for heat

I am writing a work of fiction in which, circa 2030, the global average temperature of the Earth falls by 150C (~270F) over the course of five months. This upends the way societies work as people ...
4 votes
2 answers
686 views

Writing a timeline for the robot apocalypse

Can anyone help with a robot apocalypse story? Wall of text incoming… I am planning to write a dark, slightly comical novel that chronicles the events of a robot apocalypse (mostly from the ...
6 votes
4 answers
522 views

Where should compounds be built for an impending "zombie" apocalypse? [closed]

I have been working on a post-apocalypse world where over 90% of the world’s population died in a “zombie” apocalypse (technically living zombie trope). This apocalypse occurred around 125 years prior....
5 votes
7 answers
900 views

Riots break out after the general population realizes that the government can't save them from an asteroid. Would wars also break out?

A follow up to this question about an asteroid (which I will give 48 hours before picking an answer). Consensus was that I was being way too optimistic, and that only a small population will survive ...
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6 votes
2 answers
230 views

How plausible is this volcanic eruption event? Dark Age without total extinction of Stone/Bronze/Iron Age people?

At the end of the desert's westward Great River (think the Nile in Egypt) there is a volcanic island called Harek-Set. Its black mountain is a hotspot volcano which produces obsidian and makes the ...
49 votes
28 answers
7k views

Why would The Machines not hunt humanity?

The Slow War is almost over. The Machines appeared almost twenty years ago, and since then we've all but lost humanity without them firing a single shot. Instead they won through brute industrial ...
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3 votes
2 answers
249 views

Minimum Safe Distance From Planet-Destroying Event

Okay, I have this villain who's able to create supernova-like explosions from his body that release a total energy of 1.67x10^39 J, and the heroes stop him from destroying Earth by portalling him away ...
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2 votes
2 answers
220 views

How feasible would humans beings wiped out by plant aliens be?

In my world, the population of mankind has been all but wiped out by the accidental introduction of extraterrestrial plants brought to earth by scientists who were attacked by them. The plants ...
3 votes
4 answers
257 views

What worldbuilding conditions would need to exist to allow a terrorist organization to inadvertently destroy their entire civilization? [closed]

Here is the question that most contains the scenario for this new one because it’s a continuation so I would recommend reading the scenario in that question. Note: this is about the Venus society ...
's user avatar
13 votes
9 answers
3k views

I need to be able to turn individual people's gravity off

I'm writing a book to redefine the horsemen of the apocalypse. My first book concentrated on a new "Death", who reveals that there are in fact 7 "horsemen", not 4 - war, death, ...
-5 votes
2 answers
140 views

How fast can a cockroach scaled up to 1:72 scale(72 times bigger) run and move barring the square-cube law? [closed]

I had a passing idea for a world where giant cockroaches attack a city and was wondering how fast can they run at this scale. I know that even normal-sized cockroaches are fast, so must be even more ...
2 votes
1 answer
201 views

Would this combination of pathogens make excellent zombies?

For the creation of the perfect zombies I have a "zombie-making mix" in mind. How good would it be for a zombie apocalypse? regardless of the level of realism in its creation. I've separated ...
25 votes
13 answers
7k views

Why would the military use tanks in a zombie apocalypse?

So usually the use of tanks is to shoot at other tanks or fortifications. So would a tank be useful against zombies? Would they just use it to crush the Zs?
3 votes
5 answers
1k views

How many species does a virus need to infect to destroy life on Earth? [closed]

Okay, let's say that there's a virus that can infect multiple species, is very hard to cure, extremely contagious, can linger asymptomatically for long periods of time, and likely to be deadly. It ...
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6 votes
2 answers
396 views

what is the most devastating location for an asteroid to hit?

I've been wondering for a while and have seen conflicting results, so I'm asking. "if an asteroid were to hit an extremely earth-like planet, would it cause the most damage when hitting the water,...
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8 votes
2 answers
278 views

How to Build a "Believable" Fall of Civilization? [closed]

Nice to meet you all. Inspired by Star Trek: Discovery's Season 3 and "The Burn", I've been re-reading materials where there has been a "Fall of Civilization" scenario and it seems ...
16 votes
3 answers
5k views

A 1 kilometre wide sphere of U-235 appears in an orbit around our planet. What happens?

Let's suppose that after seeing aliens get portrayed negatively in science fiction and wishing to end the discrimination, the ancient H'andh'wh'a'vians decide to destroy Earth and humanity. As they ...
-1 votes
1 answer
110 views

Could a terrorist organization destroy most of Earth's population? [closed]

A small, but wealthy, terrorist organization, (or "freedom fighters", or "savoiurs of the world", if you use their own language) sees the world as full of "sinners", and ...
3 votes
4 answers
396 views

What If A Positively-Charged and a Negatively-Charged Planet Collided?

Let's say we have two planets. Both are around the same mass and radius as Earth, and are 1 year away from colliding with each other, each traveling at 20 km/s. At first. Planet 1 has a sufficient ...
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3 votes
1 answer
119 views

Could This Method Create a Zombie Apocalypse

Background: Let's say a "failed" (they thought it failed, at least) government experiment created a portal that a necromancer existed from. The necromancer has the following abilities: He ...
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4 votes
1 answer
102 views

How could a civilization survive a continent splitting cataclysm? [closed]

Say the lost continent of Lemuria was real, and was home to an ancient sophisticated civilization that like the Atlanteans, dabbled in high technologies and forbidden magicks. Due to their fatal ...
4 votes
3 answers
229 views

How could zombies infect the population of an entire town? [closed]

There is a zombie apocalypse scenario where one zombie appeared in a small town in America. Would it be possible or plausible for them to take over? My problem is that the military would just quickly ...
6 votes
4 answers
316 views

I need to destroy the Earth. Is this what it might look like?

This is a small but critical part of my story; I need to kill off most of humanity (leaving a 5- or 6- digit number of survivors) and render the planet uninhabitable long-term, but survivable for a ...
6 votes
5 answers
696 views

Could an earth like planet turn into Venus and then back again?

So, I have an Earthlike planet with a healthy biosphere, and I need to completely reset all complex life on it. Near as I can tell, one way to do this is by totally destroying the atmosphere (after ...
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9 votes
5 answers
982 views

What would be the most helpful household items in a zombie apocalypse?

We all know the ideas about the "ideal zombie shelter" stocked with food, water, and ridiculous amounts of ammunition, hidden somewhere up in the Rocky mountains far from cities. But what ...
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1 vote
1 answer
57 views

Impact of global volcano eruption into artificial structures

A suplement to this question this time targeting human constructions and artificial structures. Imagine that one day all Earth volcanoes has erupted in the same moment. How would running lava, ash and ...
  • 2,205
3 votes
1 answer
124 views

Environmental effects of global volcano eruption [closed]

Imagine that one day all Earth volcanoes has erupted in the same moment. What impact would such event has on nature and environment? How would running lava, ash and gases blowing from volcanoes impact:...
  • 2,205
5 votes
2 answers
253 views

How to blow all Earth volcanoes in the same time?

I would like to eliminate entire human race, by turning Earth into second, world-sized Pompeii. I'd like to destroy all "habitable areas" so that human population would be effectively ...
  • 2,205
4 votes
1 answer
105 views

Can I kill all humans using only volcanoes, erupted ash and magma?

I need to eliminate entire human race, by turning Earth into second, world-sized Pompeii. I need the planet to be burned to the very ground, in ashes. Is this possible at all? Does Earth or Earth-like ...
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-1 votes
3 answers
138 views

If a character were to live in a hot climate for the majority of their life, would their core temperature increase?

I'm making a comic about the apocalypse and I have a character who lives in Australia for most of his life. The thing is, global warming has caused Australia to increase in temperature so much, it's ...
6 votes
3 answers
321 views

Kill all humanity, but leave buildings not touched [duplicate]

I need a completely empty Earth. I need: a natural phenomenon, some local or extraterrestrial disaster, some intentional human action or event, to turn the entire Earth into second, world-sized ...
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15 votes
12 answers
5k views

How could a mighty Elven Empire be reduced to scattered bands of druidic nature-worshiping aboriginals, vulnerable to Colonization?

I've been laying the groundwork for a New World Campaign based off of works like Powdermage, Greedfall, and Colonial Gothic (and the Witcher- nothing beats the Witcher), and one of the integral ...
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6 votes
8 answers
662 views

What could lead to everyone on Earth becoming gay, and the human race facing extinction because they believe they can't reproduce?

I'm interested in creating a (humorous, satirical) science-fiction short story wherein the protagonist repeatedly claims if everyone was gay, the human race would die out. Then (somehow) one day... ...
9 votes
7 answers
1k views

What are the easiest/most suitable fruits and vegetables to grow in an apocalyptic scenario?

My story is set in a sort of apocalyptic world, the main characters live in an old house and they’re too afraid to go out as there’re creatures hunting them. They obviously still need to eat so my ...
4 votes
2 answers
599 views

What would happen to the moon if Earth shattered?

In relation to one of my questions, Earth was destroyed after hit with a weapon that tore the planet apart by magnetic and gravitational force which does leave a large segment left floating. The rest ...
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