Questions tagged [extinction]

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

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3answers
152 views

What animal would be the most likely to become human-like after an asteroid wipes out all mammals? [closed]

If an asteroid struck the Earth with enough power to cause the extinction of mammalian life, which animal would be the most likely to both survive the event, and evolve to be able to use language and ...
2
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3answers
193 views

What animals would most likely fill large land animal niches after a mass extinction that wipes out 99% of life caused by nuclear war?

Before the Permian extinction synapsids occupied large land animal niches. After the permian extinction some synapsids occupied large land herbivore niches, but most large land animal niches were ...
6
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1answer
144 views

Who on Land Will Survive The Inverse Great Dying?

Long ago, I asked a question on what would create an inverse Great Dying. Allow me to clarify on what I meant: 252 million years ago, the worst event in the history of life on Earth occurred. 70% of ...
4
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3answers
171 views

Would different types of species change drastically ove the course of 1000 years if humans went extinct? [closed]

If humans all went extinct from war and lack of resources and left no trace except for their big cities, would any species change drastically over the course of 1000 years? Would they have notable ...
3
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2answers
890 views

Bill Gates Is Thinking About Dimming the Sun - What's the worst that could happen? Real-life WorldBuilding

Bill Gates Is Thinking About Dimming the Sun The billionaire is backing a study of the controversial technology called solar geoengineering. Let us suppose that the research shows that cooling the ...
2
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1answer
85 views

Impact winters and understanding their “impact” [closed]

I have visited Impact Earth! and love the amount of information. I understand the information on how much particulate would be ejected into the atmosphere. However, there are no calculations for how ...
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 ...
4
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2answers
133 views

How to Cause a Hydrosphere Apocalypse Part II The Great Flood

This is part two of a two part question. You can find part one here.(How to Cause a Hydrosphere Apocalypse Part I The Great Drought) One of the more interesting movies I watched growing up was ...
5
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3answers
151 views

How to Cause a Hydrosphere Apocalypse Part I The Great Drought

This is part one of a two part question. Part two can be found her (How to Cause a Hydrosphere Apocalypse Part II The Great Flood) Desert planets are a staple of science fiction. And while we have ...
0
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1answer
138 views

Should a space faring species interfere in a Mass-extinction event, which is necessary for the evolution of a future civilization? [closed]

I recently came across an audiobook called Permian by Devyn Regueira. The synopsis was about a recent discovery of fossilized eggs and two strange cave carvings in Siberia, one that describes the ...
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2answers
477 views

Death of animals larger than a mouse, 16/17th century

What would be the repercussions of all non-human animals larger than a mouse dying around 16/17th century in a certain region or across the globe? Would it mean eventual extinction of humans, as they ...
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5answers
648 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
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2answers
198 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
601 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
348 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. ...
4
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4answers
223 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
68 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
125 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
314 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
139 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
493 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 ...
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5answers
302 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 ...
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2answers
256 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
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1answer
115 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 ...
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6answers
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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 ...
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0answers
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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 ...
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4answers
144 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
357 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 ...
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4answers
336 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
199 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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2answers
169 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, ...
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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....
3
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4answers
316 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 ...
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5answers
362 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 ...
27
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16answers
6k 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
184 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. ...
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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 ...
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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 ...
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6answers
418 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 ...
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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
238 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
155 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 ...
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12answers
911 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 ...
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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, ...
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5answers
545 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 ...
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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. ...
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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 ...