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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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21 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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2answers
56 views

Is it possible, with modern technology, to hold a small planet in place?

In one of my universes, Humanity found a so-called "world anchor" on the Moon. They removed the anchor and returned to Earth. A few days later, the Moon exploded and a planet about the size of Mars ...
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4answers
72 views

Genetic engineering to cure a disease leading to a worldwide apocalypse - how plausible is it? [closed]

I'm planning on writing a story in a post-apocalyptic world where normal humans are hunted by genetically modified predators, both human and otherwise. However, I first actually need to create this ...
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4answers
315 views

The moon will fall to earth in 100 years, how fast is the asteroid that knocked it down?

We have at most 100 years to abandon earth. The 10-km asteroid which killed the dinosaurs has hit the moon head-on instead. As a result, the moon has slowed down and it’s orbit will decay by 400,000 ...
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5answers
810 views

How might people try to stop the world becoming a rogue planet?

I'm working on a story about Earth or an Earth like planet with current or very near future levels of civilisation and technology drifting or speeding out of the solar system. Currently my method for ...
3
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9answers
333 views

Why might someone be the last person alive in the galaxy? [closed]

I'm writing a science fiction story about a man who has to rebuild civilization from the ground up after all intelligent life in the galaxy is destroyed. (Using gene samples, seed banks, etc.). But I ...
7
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18answers
3k views

How does an alien race from a dying world annihilate most of humanity to colonize the planet for themselves?

The Stackexhangerians live on a habitable, earth-like planet near Alpha Centauri. Problem is that their world is dying. Let's say it was attacked by yet another race of hostile aliens, and most of ...
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14answers
4k views

What is the most REALISTIC cause of a worldwide catastrophe/apocalypse in the near future? (next ~100 years) [closed]

Trying to figure out a post-apocalyptic scenario and looking to stay somewhat within the realm of possibility. Given how tech levels MIGHT be in a 50 years, what would you say would be the most likely ...
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3answers
304 views

Would measles make a good apocalypse?

Let's say terrorists wanted to release a bioweapon that could deal with most of the world's third world population, and they developed a chimera disease that was essentially the measles, but with ...
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2answers
101 views

The World of Coa, Cosmic Rays, Skynet, and Solving the Pig Apocalypse [closed]

Coa The world of Coa, filled with humanoid species, has been at peace for centuries. Following the unification of the species under the governance of Mother, all military systems have been forsaken. ...
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1answer
166 views

How big would an asteroid have to be to destroy 99.9% of the human population? How would the remaining survive? [closed]

Let's say that a mega-asteroid is heading towards Earth. I want it to destroy essentially the entire population except maybe a few million people around the world. Now, I know that for an asteroid of ...
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3answers
197 views

How much damage could a complete loss of technology cause?

I'm working on an idea for a story. It takes place in the somewhat distant future, say 200-300 years. Some time between now and then, an event occurs which causes all computers to simultaneously fail. ...
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6answers
2k views

2 weeks and a tight budget to prepare for Z-day. How long can I hunker down? [closed]

tl/dr: The zombies are coming. The first will "show up" in two weeks. I have about $3000 to prepare and my plan is to hide in my home for as long as possible. I need to secure my house, buy ...
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7answers
3k views

What is a reasonable time for modern human society to adapt to dungeons?

TLDR: how long would it take modern day humans to adapt to an incident where dungeons appear on earth and spits out monsters? I am writing a fantasy/apocalypse novel set on modern day earth. One day,...
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1answer
193 views

How long would it take for society to rebuild itself? [closed]

Humanity creates a new technology that discovers these strange crystals (on Earth) that produce a little bit of electricity. There's now a race for mining them, and the whole world is going crazy over ...
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10answers
12k views

Could human civilization live 150 years in a nuclear-powered aircraft carrier colony without resorting to mass killing/ cannibalism?

An un-treatable virus starts infecting and killing people. Societies are on the brink of collapse, and it is decided the best way to save the most amount of people is to move everyone who can fit into ...
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2answers
162 views

Deadly virus going extinct - “grey goo” a solution?

With the evolving global warming and thawing of permafrost, an ancient deadly virus begins to spread from Siberia across Eurasia, affecting domestic animals first and mutating quickly onto the rest of ...
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7answers
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How large would a mega structure have to be to host 1 billion people indefinitely?

Ruins of buildings, abandoned cities and suburbs dot the coasts of Earth's landmasses, inhabited by wild animals and the pieces of a once vibrant civilization. The oceans are relatively empty, the ...
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3answers
261 views

Firearm ammunition surviving 200 years

OK - breakdown in society - economic apocalypse in 2030 - society breaks down and the supply chain of what we take for granted fails. 200 years later we have regressed to a technological period of ...
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9answers
603 views

How to destroy a galactic level civilization and still leave behind primitive survivors?

Basically, the problem is I want to leave behind isolated pockets of survivors. Also, I want these survivors to be a primitive culture - current real world level - compared to the original ...
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5answers
216 views

How to annihilate all life on a planet? [duplicate]

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6answers
1k views

Would the US government be able to hold control if all electronics were disabled for an indefinite amount of time? [closed]

In my story (modern fiction/ apocalyptic survival fiction) an enemy of the US sets up a EMP pulsing satellite over the continental US, and before we can respond all electronic systems are shut down. ...
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11answers
468 views

What type of natural or artificial disaster could devastate a multi galactic civilization?

There is an advanced civilization that spans multiple galaxies. The civilization has learned to tap every available source of energy within the volume that it has colonized. The civilization ...
7
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6answers
395 views

What survivable events would make Earth least inhabitable?

I am interested in events that would so radically change Earth (for the worse) that it would be near uninhabitable for humans. The event may or may not be deadly to humans, but the world it leaves ...
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2answers
157 views

Is it possible to engineer airborne Ebola?

In my world, a mad scientist wanted to end humanity and he was looking for something with a high mortality rate. He found Ebola. But it's not airborne though. Could it be possible to genetically ...
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5answers
199 views

A fast apocalypse with survivors, but very low chance of rebuilding [closed]

I need an event which could make the world go from "similar to today" to post-apocalyptic in one lifetime, preferably in 20-40 years. It needs to happen fast, because I want to focus the story on ...
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6answers
4k views

What would happen to a modern skyscraper if it rains micro blackholes?

Set in present day New York City, an unknown spacecraft of alien origin expelled millions of micro blackholes each with the mass of a grape in the earth atmosphere. I like to know what happens if ...
14
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12answers
3k views

Little known, relatively unlikely, but scientifically plausible, apocalyptic (or near apocalyptic) events [closed]

We know the common tropes for an apocalyptic event: meteor/asteroid hits earth; crazy infectious virus/bacteria; AI takes over; we nuke ourselves; climate change; hostile aliens. But what are some ...
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4answers
316 views

Can I X-Ray a civilisation to death?

Something in orbit around an inhabited planet blasts it with a hefty dose of gamma rays/x-rays/something else, killing everyone within a relatively short time frame (hours or days) but leaving no ...
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17answers
7k views

Need a specific event that wrecks the surface, allows the race to survive in bunkers, and affords an aftermath suitable for them to rebuild

One rule: it cannot be caused by aliens or AI invading the planet. But it is okay if an alien race causes the destruction in any other way. It's an Earth-like planet. I need the effects of the ...
2
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2answers
209 views

What would annihilate life on a planet but allow it to be habitable 1-10 years later? [duplicate]

I'm writing a fantasy/sci-fi story. Imagine an alien race, about as advanced as any sci-fi alien race has ever been depicted in any REALISTIC medium. They're gonna target an earth-like planet. I need ...
2
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2answers
125 views

Apocalypse by Atomic Catalyst

This question is a continuation of Unprepared and Without a Homeworld. The premise of this idea is that a substance called an Atomic Catalyst exists that can lower the temperature at which particles ...
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20answers
3k views

How could a plague that killed off the dinosaurs come back?

In my story, something pretty insane happens during the 3rd season. The common conception was that an asteroid strike contributed to the extinction to dinosaurs, but unbeknownst to all it was not a ...
15
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3answers
2k views

Plastic and oil eating microbes apocalypse part 1 - How fast can they spread?

Plastic is a huge problem in our lives. One of the ideas is to engineer plastic eating bacteria or fungi. Experiments already begun, and accidents already happen: a team of international scientists ...
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5answers
7k views

How long could a nuclear warhead remain functioning underground?

So, in my world, a nuclear war engulfed the Earth in the autumn of 1962. It is now the year 2568. In my story, a cult of mutants known as “The Followers Of Uranius” have sprung up in Kansas City. ...
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5answers
360 views

With an impending cataclysmic event, when would the economy break down?

Motivational musings: If there was an impending, unavoidable, and universally accepted cataclysmic event that will absolutely destroy everything, how long would it take for the economy to break down? ...
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5answers
2k views

How many horses would be required to pull a modern Caravan

I'm currently investigating a post-apocalyptic novel and wished to know if Horses could be used to pull a modern Caravan and if so how many. Furthermore what would the potential daily range of such a ...
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2answers
158 views

If extra dimensional beings came to Earth- how many beings and how long to disrupts all major civilisations on Earth [closed]

Extra-dimensional beings are the same size and speed as human (fast walking). They walk in random direction- they have no idea that they came to Earth (accident on their world) and arrived at random ...
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12answers
8k views

Why would the tribes choose herding instead of agriculture in the Great Plains?

So, in my story, the entire world has just gone to absolute crap. The largest war in human history, WW3 in October 1962, has just caused destruction in most of the United States, the Soviet Union, ...
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2answers
260 views

How to start a giant war that no one can stop? [closed]

I want to create a giant war, called the 10,000 War. This war becomes so big entire civilizations get wiped out, and no one can stop it, though everyone wants to. The war cumulated to become bigger ...
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1answer
65 views

Planet Size Disaster [closed]

What kind of disaster could be large enough to wipe out an entire planets life and leave it like a complete wasteland, similar environment to what Mars is? Nuclear warfare or meteors are what I have ...
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18answers
4k views

Worse than zombies, part 1 [closed]

At university my peer group started to use the saying "it could be worse, there could be zombies" as a way to tell people to keep things in perspective. The statement always implied two things: ...
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17answers
790 views

How could aliens exterminate the human race while leaving the Earth unharmed?

Imagine an alien race that's advanced enough to wipe out humanity. They are here and they want Earth. They know we are not gonna let it go easy 'cause they've studied us for decades. Their motivation ...
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2answers
286 views

What would happen to Earth's climate and sky if the ozone layer was completely distroyed? [closed]

It would be very interesting to have sci-fi stuff showing our planet lacking the ozone layer due to deterioration of biodiversity and pollution. I read that Earth could not have life if there wasn't ...
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3answers
249 views

How could a real world doomsday cult go about causing the apocalypse? [closed]

This is not a fantasy or sci-fi scenario. This is about a doomsday cult terrorist organisation, akin to Aum Shinrikyo, in the present-day real world. Is there any way that such an organisation with ...
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2answers
215 views

What materials would be needed to build a homemade spaceship, in the apocalypse?

So, out in Kansas, in the DEC Oil Refinery, a group of people, called simply the Disciples, have set up a community. From the outside, it seems like a utopia, one where man and mutant get along ...
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5answers
345 views

How could the Girl Scouts prove that Twinkies will trigger the zombie apocalypse?

Dear Journal, I spent the morning planning on telling you about how Teresa MacPherson tried to steal Larry away from me and then how much fun last night's camp with the troop was... but I just ...
7
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2answers
749 views

Would an earlier HIV pandemic be a realistic, plausible historical apocalypse scenario?

The most recent common ancestor of the HIV-1 M group, responsible for the HIV pandemic, dates back to the Belgian Congo city of Léopoldville (modern Kinshasa), circa 1910. And the genetic history of ...
25
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10answers
6k views

How much time does Earth need to repel interstellar attack?

Highly inspired by How would we fare against an interstellar RKKV Attack? Lets repeat the setup of the original question: In this hypothetical scenario, in the present day, astronomers detect an ...
11
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9answers
3k views

Massive Meteor Net?

Premise Suppose a world has no other means to deal with a potentially devastating meteor impact than creating a net on the planet. Their hope is that the massive net will catch the meteor and slow it ...