Questions tagged [apocalypse]

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

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5
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2answers
82 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 ...
47
votes
28answers
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 ...
4
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2answers
153 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 ...
2
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2answers
179 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
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4answers
226 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 ...
12
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9answers
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
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2answers
121 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
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1answer
131 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
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13answers
6k 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
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5answers
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 ...
6
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2answers
371 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,...
8
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2answers
210 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
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3answers
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
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1answer
82 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
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4answers
370 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 ...
3
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1answer
100 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 ...
4
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1answer
82 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
3answers
208 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
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4answers
297 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
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5answers
642 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 ...
8
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5answers
592 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 ...
1
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1answer
53 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 ...
3
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1answer
103 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:...
5
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2answers
211 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 ...
4
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1answer
93 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 ...
-1
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3answers
129 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
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3answers
286 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 ...
15
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12answers
4k 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 ...
5
votes
8answers
554 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
7answers
995 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
2answers
267 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 ...
3
votes
1answer
167 views

What is the climate like 200 years after nuclear war?

I know there would probably be an ash-based cooling period, but, how long would that last and then what happens? Is the post-apocalyptic desert even possible in a post-nuclear war world?
1
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1answer
163 views

Can you survive in a pub cellar for a week? [closed]

This is for research for a kaiju horror story. I'm toying with it being set in an English pub cellar (like that of a Wetherspoons) as the surface is crawling with newly emerged kaiju, the plot ...
11
votes
8answers
2k views

How can we make a one-way radio?

My story is set in an apocalyptic Earth (occurring during the story), and the main character is stationed out alone on a sea fort in the middle of the ocean. He receives a radio call/signal from a ...
0
votes
1answer
107 views

How to “burn” Oxygen (Exterminatus) [duplicate]

A year ago, I asked on the possibility of Teller Nuclear Bombs, where the bomb is hot enough to fuse oxygen and cause a runway reaction that destroys Earth by using the air as "fusion material". This ...
0
votes
3answers
231 views

How long could a city that is completely cut off sustain itself? [duplicate]

I have a city, and let's say this city gets cut off, Berlin '45 style. Nothing in, nothing out. Classic siege. I want to be more specific than that though: Suburbs won't be in it, it will be all the ...
4
votes
1answer
75 views

What signs of nuclear explosion in SLC can be seen from Lincoln Highway?

First thing: I don't know if it's the right stack to ask this question, so I'm sorry if it's not. I'm writing an adventure for an apocalyptic RPG session. One point of the plot is a detonation of 100 ...
3
votes
3answers
174 views

Would it ever be theoretically possible for future humans to prevent the sun from increasing in luminosity to the point of killing all life?

I am currently brainstorming a hard (like the hardest possible; everything that occurs in the story must at least be theoretically possible) sci-fi story which will take place far in the future. I don'...
3
votes
3answers
328 views

Which human-made monuments would still be standing thousands of years after an apocalyptic event? [duplicate]

It has been several thousand years since an apocalypse happened. The cause was some kind of explosion, be it nukes or a extinction-event meteor. Humans have persisted, as they do, and have effectively ...
2
votes
1answer
148 views

To what extent would a 21st Century Industrial power collapse under an airborne HIV-like virus? [closed]

In an alternate 21st Century Earth, an airborne strain of HIV, or a brand new airborne virus that causes the same symptoms of HIV evolves. The new Super-HIV virus retains the ability to transmit by ...
0
votes
1answer
94 views

Land and sea are infested by giant carnivourous squid/crab things. How do I survive? [closed]

So, recently, a bunch of Kraken eggs have hatched, bringing them back form a few centuries of extinction for unknown reasons. Also, turns out that when their sea-based population gets too high, some ...
-2
votes
1answer
163 views

How would Europeans fend themselfs in a Zombie apocalypse? [closed]

Most of zombie apocalypse movies, series, comics, etc. are set in the United States, but how an outbreak look like in European countries? Would it be different at all?
3
votes
7answers
264 views

If an evil AI has access to the Internet, what are the options that it has to kill humanity? [closed]

Let's suppose that a mad developer made an evil Artificial Intelligence and gave it access to the Internet (normal net, dark net, anything). What are the options that it has to kill humanity with that?...
5
votes
5answers
794 views

Realistic powers in an apocalyptic/post-apocalyptic setting

In most apocalyptic settings(specially those with a zombie-kind of plague) the main character(s) only have very mundane means to deal with their problems and those always have a catch: any gun they ...
5
votes
4answers
229 views

Why can't our self-replicating message in a bottle stay in Sol?

Suppose we knew of an extinction level event in a few decades, and through a large Manhattan Project-type effort humanity manages to construct a von Neumann probe with a copy of all human knowledge. ...
13
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10answers
632 views

How to make FTL-technology an narratively interesting suicide-pact-technology?

Building my sci-fi setting deciding what's the in-universe answer to the Fermi-paradoxon, the reason why the universe still seems to be empty of K3 civilisations despite its age, has been quite ...
1
vote
3answers
209 views

Which domestic animal would pose the greatest threat to humanity during zoopocalypse?

Set in the modern days, one night the sky is suddenly lit up in a mysterious bright blue glows that fades off almost immediately. It seems that somehow the event caused a mutation in one of the ...
5
votes
7answers
359 views

Citywide Abandonment of Law Enforcement at World's End?

Building out a place less than 100 years in the future where the world is finally in agreement that it's coming to an end, in about 10 years or less. The air is trash, high government people are in ...
3
votes
3answers
192 views

Tetrodotoxin: the end of the biotic era?

Tetrodotoxin (TTX) is a potent neurotoxin and extremely toxic. The Material Safety Data Sheet for TTX lists the oral median lethal dose (LD50) for mice as 334 μg per kg. For comparison, the oral LD50 ...
2
votes
2answers
139 views

How long until land life can return after the impact?

So, it finally happened. The Earth was hit by a comet, and anyone outside of a research station at the bottom of the Atlantic is now dead, or dying. So, here's what we need to know: How big would a ...

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