We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [apocalypse]

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

Filter by
Sorted by
Tagged with
0
votes
0answers
31 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 ...
-1
votes
2answers
61 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 ...
2
votes
4answers
570 views

Earth Exploding

If the Earth all of sudden was instantaneously transmuted into pure light, what would happen? How much energy would be released? How much damage would it do to surrounding space? Would it destroy ...
5
votes
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 ...
7
votes
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 ...
-2
votes
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 ...
16
votes
6answers
5k views

How to quarantine a major city?

We have an outbreak of a zombie-like disease in major metropolitan areas. The disease itself has a slow incubation period, and after a time it becomes clear that it is spreading faster than they can ...
10
votes
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
votes
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 ...
8
votes
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 ...
4
votes
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 ...
-2
votes
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. ...
2
votes
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 ...
5
votes
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. ...
357
votes
25answers
39k views

How would Facebook Sysadmins prevent the summoning of Cthulhu?

So, I've got this idea for a short story. Some researchers find a forgotten manuscript hidden locked away in an ancient tomb. While they are working on it one of them pastes part of the text into a ...
15
votes
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 ...
9
votes
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,...
3
votes
6answers
711 views

How would my 'zombie' virus cross bodies of water

America 2018: The country has been infected with a parasitic virus that causes two kinds of zombie; Slow but smart zombies where the parasitic virus has not grown to full size. They are slow ...
0
votes
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 ...
24
votes
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 ...
3
votes
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 ...
6
votes
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 ...
20
votes
7answers
7k views

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 ...
65
votes
18answers
13k views

Architecture of the perfect zombie apocalypse refuge

Your mission, whether or not you choose to accept it, is to design the perfect refuge from the zombie apocalypse. Starting assumptions and constraints: The zombies will be slow (walking) zombies (...
5
votes
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 ...
9
votes
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 ...
7
votes
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. ...
50
votes
16answers
22k views

What should three men and three women do if everyone else is dead?

Recently, I asked what could kill all humans except for those in low orbit. Out of the answers that popped up (which included the Ragnarök), I picked a plague as being the most desirable for my ...
6
votes
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
votes
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 ...
3
votes
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 ...
12
votes
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 ...
1
vote
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 ...
22
votes
17answers
5k views

Shooting an energy beam into the Sun (from the Earth) in order to destroy it

This question is about a fictional scenario where an evil suicidal scientist has built a high-energy weapon somewhere on earth. His intention is to shoot a beam of some form of energy (or high-energy ...
14
votes
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 ...
15
votes
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 ...
5
votes
9answers
462 views

Is it possible for humanity to completely annihilate itself?

Is it possible for humanity to completely annihilate itself? By that I mean there cannot be one survivor left and the annihilation must be caused by humanity itself with current technology (no crazy ...
6
votes
5answers
365 views

Removing an atmosphere from a previously-habitable world

Alien AI DoomFleet has a mission: Destroy threats to their creator. They do this by detecting the signature of FTL drives, going to the system, and blowing everything up, up to and including the ...
50
votes
10answers
50k views

Will unattended nuclear power plants actually cause damage to their surroundings?

Scenario: Deadly virus wiped out 80 - 90% world population and it did it pretty quickly (in 2 months) Although it is plausible that among these 10 - 20% of survivors will be people who actually know ...
14
votes
2answers
2k views

Glass rot - could we survive it?

In the near future on our own planet of Earth, an odd plague has descended from space. It affects glass. Any glass whether natural or man-made turns into powder. The chemical elements are the same, ...
9
votes
4answers
3k views

How many deaths can be caused by a Coronal Mass Ejection (Solar Flare)?

Where should I shoot a solar flare that is at least as strong as the solar flare(s) in 2012 for the most death? What else would happen? And how much death, in percentage of world population, would the ...
2
votes
8answers
3k views

What would a relativistic kill vehicle hitting the moon look like from earth?

For some reasons aliens wanted to kill off humanity, and therefore they sent a relativistic kill vehicle to Earth, with enough energy to destroy all life on Earth. However they slightly mis-targeted ...
14
votes
9answers
4k views

What's the worst natural disaster that could hit New York City in our lifetime? [closed]

I'm writing a post-apocalypse story that takes place in New York, mainly the city as the survivors escape the island to the outer boroughs. Anyway, living in New York all of my life, the worse that I'...
-5
votes
3answers
780 views

What if the earth was turned physically inside out?

Let's say some magic aliens come and prank us. They, in one step, remove out the innards of the earth, and put everything on the surface on the inside. They make some artificial gravity so we stay on ...
25
votes
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
votes
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 ...
15
votes
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 ...
2
votes
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 ...
17
votes
3answers
4k views

What would the effects be on a earth-like planet if the magnetic field was much stronger

The hypothetical world is for all intents and purposes earth or very close to it. So what would the effects be if the magnetic field were either stronger from the start of the planet, or if the ...