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Questions tagged [apocalypse]

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

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Post-war apocalyptic desertification scenario lasting at least 1000 years

I am writing a story, in which humanity is struggling to survive and rebuild civilisation hundreds of years after a devastating war with AIs. I'd like the world to be covered in deserts, where humans ...
Eillis's user avatar
  • 31
12 votes
5 answers
7k views

The rotation of the sun's core doubles in speed every 10 years. How many years before the situation turns apocalyptical?

I'm asking this because I'm writing a fictional story where I need a doomsday scenario that means humanity must escape the earth. The timeframe that would fit the plot of the story would be in the ...
ElectronicToothpick's user avatar
8 votes
4 answers
2k views

What is the strongest earthquake possible without wiping out all life?

In the story in question, an extremely powerful earthquake decimates the Earth (but does not destroy it) due to Unforeseen Consequences of Our Actions. Ideally some humans need to survive, so ...
Zona C's user avatar
  • 153
-9 votes
1 answer
195 views

How many humans would it take to fill a vat that is 55.5 feet long, wide, and tall full of blood? [closed]

So I am in the process of building this world where this huge(1,296 ft. long) vampiric, demonic(maybe), dragon imprisons(well, its offspring does) humanity in dreamworlds that allow them to farm their ...
Conan Highwoods's user avatar
2 votes
1 answer
181 views

How quickly could a bronze age society be reborn after regressing due to a mass extinction and ice age?

In my setting's history a rome analogue has somehow managed to conquer the entirety of a eurasia sized continent. An advanced bronze age society with significant understanding of magic. As a cooling ...
Spoon's user avatar
  • 153
0 votes
2 answers
383 views

What long term effects would an eruption of the ring of fire have on Earth? [closed]

We all know about the ring of fire, and we all know what happens when a volcano erupts. For context: this is set in the near future, with humans living in high-tech protective domes during/following ...
Saxionkin's user avatar
  • 433
1 vote
1 answer
171 views

How close Earth must be to Milky Way's center to undergo a modified 2012 film's scenario?

The 2012 apocalypse film features a premise that there are neutrinos from the sun that heat the Earth's core and thus leading to the end-of-the-world scenario. Inspiration Recently, a paper was ...
FrogOfJuly's user avatar
  • 1,148
2 votes
2 answers
326 views

How does the world rebuild after an apocalypse? [closed]

140 years ago, the world was nearly torn apart as rifts to other realms sprung up across the continent. Former societies of elves, humans, dwarves, halflings, and more were devastated, and now new ...
Merripen's user avatar
2 votes
2 answers
516 views

Radios and walkie-talkie [closed]

In a solar punk if there are radios and walkie talkies being used regularly by a very poor post-apocalyptic society...does it sound believable that there are no airplanes and flying vehicles nor cars, ...
Writer-Writer's user avatar
1 vote
2 answers
263 views

Gas or Electric for a Zombie Apocalypse [closed]

This question is referring to tools, like chainsaws and weedwhackers. Gas would be easier to get, being a liquid form that can be stockpiled, but gas tools are loud and leave fumes. Meanwhile, ...
Mace19's user avatar
  • 19
6 votes
1 answer
190 views

Can Earth have blue skies and diverse clouds yet never a drop of rain?

I'm trying to figure a threshold of environmental conditions where the Earth hits a point of no return on falling rain. The thought seems preposterous to me, but recently I saw some movie that claimed ...
Kai Qing's user avatar
  • 1,130
2 votes
4 answers
2k views

Alternate Bullet Propellants [closed]

For my world, I want there to be many types of ammunition due to the world being an apocalyptic-anarchy kinda thing. Mostly land combat, little to no spacecrafts or vehicles. Anyone know any good ones?...
Mace19's user avatar
  • 45
0 votes
2 answers
497 views

How much and how powerful would a "phlebotinium" bomb launched from orbit be to create an artificial sea? [closed]

I am writing a setting for an unspecified goal, whether I will end up doing a video game or a novel out of it all, but I am still working on the worldbuilding aspect. Lore-introduction, (you can skip ...
Just Kherty's user avatar
8 votes
3 answers
2k views

The Frozen Star - Can U-238 reactors be used as a energy source for 10,000 years?

I was watching this Minecraft Animation video based on a scientific concept about what would happen if we froze the Sun - What happens if we Freeze The Sun- Portrayed by Minecraft. In this video, ...
Alastor's user avatar
  • 3,402
6 votes
6 answers
710 views

How do we stop a gray goo disaster? [duplicate]

Let us imagine a scenario where the apocalypse has come in the form of gray goo: tiny nanotech replicators that are set to consume all the biomass on Earth while replicating themselves. Humans, oddly ...
user98816's user avatar
  • 8,625
3 votes
5 answers
246 views

Is this asteroid apocalypse scenario realistic?

So, in response to my own earlier question: Disasters to prompt the bettering of civilisation, I have decided to go with an asteroid impact which decimates much of civilization, with an added twist ...
user98816's user avatar
  • 8,625
2 votes
3 answers
1k views

What kind of explosion could explode the whole Earth? [duplicate]

I want to make technology that can explode the whole Earth. The problem is that antimatter explosions and nuclear explosions just don't have the juice needed to blow up the planet. Conventional ...
user avatar
3 votes
3 answers
180 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 ...
Robert Rapplean's user avatar
53 votes
8 answers
11k 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 ...
JustasidequestNPC's user avatar
-1 votes
2 answers
149 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 ...
ColonizeroftheSun's user avatar
0 votes
1 answer
97 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 ...
Lee Morgan's user avatar
1 vote
1 answer
206 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 ...
Bowman's user avatar
  • 619
3 votes
5 answers
208 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 ...
forgotenm's user avatar
  • 1,054
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 ...
Joshua Taylor's user avatar
5 votes
4 answers
814 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 ...
faddllz's user avatar
  • 1,832
3 votes
6 answers
593 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 ...
A. McMount's user avatar
3 votes
5 answers
213 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 ...
Jordy the Cat's user avatar
3 votes
3 answers
191 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 ...
Peeves's user avatar
  • 39
2 votes
1 answer
145 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 ...
ohwilleke's user avatar
  • 11.5k
4 votes
5 answers
392 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 ...
Anixx's user avatar
  • 5,306
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 ...
KEY_ABRADE's user avatar
  • 12.8k
1 vote
6 answers
237 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 ...
forgotenm's user avatar
  • 1,054
2 votes
1 answer
196 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 ...
The Square-Cube Law's user avatar
5 votes
2 answers
813 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 ...
Jordy the Cat's user avatar
6 votes
4 answers
572 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....
Michael Kilgore's user avatar
5 votes
7 answers
945 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 ...
Henry Shao's user avatar
  • 1,181
6 votes
2 answers
275 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 ...
Maddock Emerson's user avatar
50 votes
28 answers
8k 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 ...
Joe Bloggs's user avatar
  • 66.3k
3 votes
2 answers
288 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 ...
TysonDennis's user avatar
  • 2,380
2 votes
2 answers
233 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 ...
SuperYoshikong's user avatar
3 votes
4 answers
275 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 ...
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, ...
Andrew Spencer's user avatar
-5 votes
2 answers
236 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 ...
Conan Highwoods's user avatar
3 votes
1 answer
237 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 ...
Timothé Lépine's user avatar
26 votes
14 answers
8k 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?
the questioner's user avatar
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 ...
TysonDennis's user avatar
  • 2,380
6 votes
2 answers
533 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,...
zackit's user avatar
  • 651
8 votes
2 answers
366 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 ...
fal'Cie KEFKA-873's user avatar
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 ...
MedwedianPresident's user avatar
-1 votes
1 answer
122 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 ...
pintergabor's user avatar

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