Questions tagged [extinction]

For questions relating to the disappearance or death of an entire species.

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4
votes
4answers
290 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 ...
6
votes
2answers
166 views

How long would it take for water vapor from an ocean asteroid impact to rain back down?

In my story a consortium of megacorporations spot a new comet 26km wide entering the inner solar system. Earth is in dire need of water because of an already worsening climate change disaster (think ...
6
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7answers
554 views

The food chain was destroyed. How is it remade?

There was a nuclear war in my world Anthropocene. It caused a mass extinction of numerous animals on the planet, so many I can’t cover them all completely, so I’ll tell you what animals are left: ...
5
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6answers
337 views

Blowing fragments of the moon off, sending them to Earth as meteors - what is the impact? [closed]

Pun not (originally) intended. In my story, a fairly advanced, newly space-faring civilisation manages to land on the moon and establish a colony, where they do some industrial work e.g. mining. ...
5
votes
4answers
181 views

How to bring humans near to extinction? [closed]

So, I have a bunch of people (say a hundred) who want to bring humans to extinction. These "people" I'm talking about (let's call them demons, though they aren't actually demons) are stronger than the ...
2
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2answers
54 views

Could an Ice Age Extinction Wipe Out All Marsupials?

Say the word "Australia", and one of the first things to come to your mind would be the marsupials. Of the 334 species of pouched mammals whose earliest ancestors witnessed the fall of the dinosaur ...
3
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1answer
119 views

How Different Would the Outcome of the Fall of the Dinosaur Empire Be if Chicxulub Hit at a Different Season?

After 150 million years, the most successful empire in the history of Planet Earth finally collapsed 66 million years ago. A five-mile-wide space bomb--there's still disagreement as to whether it was ...
7
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3answers
277 views

How do I stop Megalodon from going extinct?

A long time ago, the 60 foot long Megalodon roamed the oceans. Fast forward to 2.6 million years ago and they went extinct. In the story I'm writing Megalodon hasn't gone extinct surviving at least up ...
6
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3answers
130 views

In an Ice Age Extinction, Which Latitude Would Be Hit Harder--Tropical or Temperate?

Back home, five million years ago, the warm, wet climate of the Miocene sloped downwards into the cooler, drier Pliocene before descending even further into the more so Pleistocene. The slope was so ...
4
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2answers
478 views

Would civilization collapse if everyone becomes invisible to one another?

Set in the modern day, a meteorite lands in the pacific ocean and green flash of light sweep the entire globe. All of a sudden we are blinded to the presence of another human being, it seems that the ...
5
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5answers
279 views

Could a species evolve to the point were they cause their own extinction

We know that in biology, a species evolves to better survive its planet and its various climates and geography, which is mainly a result of natural selection. But, sometimes, this natural selection ...
9
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2answers
211 views

How to stop horses from going extinct in the new world?

Horse were originally native to north america but between 13,000 and 11,000 years ago they went extinct likely due to expanding glaciers into their territory. The question I propose is how could I ...
3
votes
1answer
100 views

Can I use an active flood basalt province as a “biome” without messing my world up?

I want to use the an active large ignious province (LIP) as a "biome" on a continent in my world. This video about the Siberian Traps inspired me. A LIP modeled after the Siberian Traps gives you a ...
12
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6answers
4k views

Is it necessary to wipe out vile man-eating dragons?

Set in the modern day, reports of dragon sightings came flooding in from all over the world. No one know where they came from or why are they here but these monstrous creatures seemed to be hostile to ...
1
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0answers
95 views

De-Extinction Candidates [closed]

I know the classic deextinction candidates such as the passenger pigeon or wooly mammoth. What other animals do we have the potential to revive? Are there any odd candidates such as other mastodons or ...
2
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4answers
129 views

A plausible reason for an alien race to attack Earth and lead to a post-apocalyptic setting [closed]

My current story is post-apocalyptic, but instead of a virus/asteroid/zombies, I'm going for an alien-caused catastrophe. The setting is a future Earth affected by depleted resources, climate change ...
4
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5answers
321 views

Can We Prevent an Impact Winter Extinction with Modern Technology?

I was certain somebody would have asked this before, but after scrolling through the Similar questions list I couldn't find any duplicates. For this question, let's say that an asteroid or comet ...
6
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2answers
235 views

Which modern organisms would survive a new K-Pg level impact?

EDIT: As many have pointed out, the whole Lunar Collision aspect I originally envisioned is probably more extreme than I predicted. I don't know where to start as far as the math goes, although my gut ...
47
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12answers
7k views

When will the last unambiguous evidence of mankind disappear?

Humanity just disappears tomorrow, let's say it is like the Thanos-snap but it kills everyone. How long until the last unambiguous evidence of our existence disappears? What was this last relic? The ...
3
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2answers
187 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 ...
-4
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2answers
156 views

19th century-like transportation without horses?

So, let’s say, hypothetically A NUCLEAR WAR KICKS OFF DUE TO PROLONGED INTERNATIONAL TENSION, AND TURNS THE EARTH INTO A BLEAK, HOSTILE WASTELAND. Now, let’s flash forward 197 years, to 2259. By now, ...
13
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13answers
6k views

Is this state of Earth possible, after humans left for a million years?

It is the year 4056 (or probably later). The rocket with the last residents of Earth just took off, because global warming and pollution couldn't be stopped nor reverted and Earth became uninhabitable....
2
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4answers
258 views

Which Modern Mammals Would Die Out in an Alternate Extinction Event 5 Million Years Ago? [closed]

Five million years ago, a progressive downward slope in the global climate put an end to the Miocene Epoch and brought on the Pliocene Epoch. To get a visual idea, since we humans are a visual ...
10
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5answers
332 views

How to justify frogs taking over?

A cool thing to imagine would be a world where the land was dominated by megafaunal frog-descendants, as it is/was by mammals today, dinosaurs before the mammals, and non-mammalian synapsids and ...
17
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6answers
4k views

Doomsday-clock for my fantasy planet

I want the surface of my fantasy planet to be made hostile every few thousand years for long enough to make every species go extinct that breeds on land. The easiest explanation seems to be other ...
12
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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 ...
26
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16answers
5k views

How can I prevent hyper evolved versions of regular creatures from wiping out their cousins?

The world is covered in mana, the life force that flows through all things. In certain places, this mana saturates to high levels. This affects the animals living in those areas, who absorb the high ...
5
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2answers
174 views

Would a More Extreme Icing of Antarctica Create an Extinction Event?

55 million years ago, the world was literally a jungle. It was so warm that plants like the bald cypress and the dawn redwood have been found at Ellesmere Island, right inside the Arctic Circle. ...
18
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9answers
3k views

Gravity alteration as extermination tool viable?

An alien race was rubbed the wrong way by humans being humans and decided that humankind has to go. However, unlike many other science fiction stories, they do not intend to give the humans even a ...
8
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6answers
5k views

Would humanity go extinct if pleasure ceases?

In the near future, the human population is overcrowded and food and water becomes scarce. Every preventative measure failed to address this issue and the world falls into a turmoil and panic is ...
7
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6answers
400 views

How to prevent a fantasy world response to repeated near extinction events?

This is for a medium/high fantasy magic setting with a medieval flavor (a D&D campaign setting) and am trying to get a grasp on expected long term effects/reaction by repeated worldwide ...
6
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9answers
3k views

Conquering the Galaxy with DNA - What is the best vector?

An evil emperor wants to conquer the Galaxy. Before sending humans he wants to send out an advance force that will subdue other life-forms. The Emperor's Adviser comes up with the idea that the ...
7
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3answers
224 views

Technology to produce food without land, what will happen with the land next?

Let's say we have the technology to produce all of the human food in factories without the need for land (i.e. Solarfood, Memphis Meats). Right now, there is about 50% of all habitable land use for ...
2
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4answers
146 views

Explanation as to how 4 species were wiped out close to extinction?

In my epic fantasy I have four races of creatures which were all hunted down due to their valuable blood which grants the drinker magical abilities (premonitions). After time they all became extinct ...
9
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12answers
864 views

What would cause an entire space-faring civilization to “expire”

Let's say there was a Type II Kardeshev Scale civilization that suddenly went extinct. Why would the entire species just die out? An added condition is that they knew of their impending destruction ...
18
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13answers
4k views

The weird case of the unresponsive Earth - why does the Earth stop communicating with Mars?

Mars has been colonized, close to a million people are now living above (and below) the martian soil, every few months a ship from Earth arrives with more resource for expansion and more settlers, ...
7
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5answers
524 views

How to wipe out ALL life on Earth, but leave it habitable?

NB: This is not a duplicate of this question, because A) it only asks to wipe out humans, not any other life-form, and B) it insists that one person must survive. The survival of anything is not ...
21
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6answers
5k views

An iron rain to starve a planet

I have a generic Earth like planet, same atmospheric composition, and the same oceanic composition. The crust of this planet is predominantly silicon based but plenty of iron, nickel and copper. ...
14
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13answers
4k views

What could explain why trees only have 12 rings?

A colony of space travelers makes their way to their new home planet. After landing and establishing their base camp, a wood worker begins to cut down trees and notices that none of the trees have ...
4
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8answers
810 views

Extinction Equilibrium: 50%

The last time I asked a worldbuilding extinction question, I asked on what sorts of factors would create an extinction event in which 96% of all terrestrial species and only 70% of marine species died ...
13
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5answers
923 views

An Inverse Great Dying

252 million years ago, the worst event in the history of life on Earth occurred. 70% of all terrestrial species and 96% of all marine species became extinct through, according to geological records, ...
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2answers
160 views

Is it possible to resurrect extinct insect species and other arthropods?

As we all know, animals are going extinct all the time and that includes arthropods. Many scientist say that we could bring extinct species (like black rhinos, tigers etc.) back to life. I was ...
6
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17answers
938 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 ...
10
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6answers
840 views

Man-made mass extinction that benefits arthropods

Context To revive the Carboniferous period of earth one man and a group of other scientists have been genetically engineering and breeding land arthropods into giant sizes and exotic shapes since the ...
0
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2answers
244 views

How would an AGI dispose of humans? [duplicate]

Disclaimer : before marking this as a duplicate please take the time to read the entire question, thank you. So a bit of context, in a world similar to ours a scientist/group of scientists create an ...
1
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2answers
144 views

How threatening is instant human extinction to life on earth? [closed]

All humans magically drop dead this very instant. How badly will this affect other lifeforms on the Earth? Ideas: Will nuclear plants leak radiation since there is no one left to man them? Will ...
11
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17answers
4k views

War in a dystopian setting

In a world where there is ever-declining population due to a phenomenon that has no satisfactory explanation, what could cause war or large-scale armed confrontations between countries or sections of ...
3
votes
2answers
415 views

Would there be any mass extinction should the polarity of Earth magnetic field flips at 1 GHz? [closed]

If the polarity of our Earth magnetic field were to flip (oscillate) at around 1 GHz or 1 billion cycles per second, would it spell disaster to fauna and flora that depends on it for navigation like ...
4
votes
3answers
367 views

How can the human race disappear in a few days? [duplicate]

Is it possible to eradicate the human race in one week? And if yes, by which way? Of course, the human race should do everything to survive. What could be more powerful than our will to survive? 1. ...
2
votes
2answers
178 views

What aquatic creatures would survive a large-end mass extinction?

I want this world to have two things, typically on the complete opposite end of geological timescales: Land fauna is incredibly "Young" - Pretty much nothing larger than a "large" insect (Some ...