Questions tagged [alternate-earth]

This tag is for questions relating to radically changed Earth. This alternate Earth could be a post-apocalyptic Earth, or Earth with major changes in the current social/political/economical schemes.

Filter by
Sorted by
Tagged with
3
votes
2answers
176 views

If Earth Were a Gas Giant's Moon

Here is what we know of Earth: Mass: 5.972 sextillion metric tons Diameter: 7,917.5 miles Density: 5.51 grams per cubic centimeter Rotation: 24 hours Revolution: 365 days Core: 760 miles wide, ...
11
votes
2answers
2k views

Could a planet have a naturally occuring moon at one of its Lagrange points?

Would it be possible for a planet to naturally have a moon or large natural satellite at one of its Lagrange points? If so would it then also be able to have a second moon that would be orbiting this ...
5
votes
2answers
468 views

Can Apes (Including Humans) Be Naturally Patterned Like Felids?

For visual reference: Apes are visual species who rely more on their eyesight than any of the other senses. As a result, they see the world in three shades of color, whereas other mammals see in one ...
2
votes
4answers
247 views

Is a partial civil war possible? [closed]

I have a fictional world, consisting of a federation of 17 provinces (in blue on the map extract). Currently, it is in the late 1920's. The Dzevogurski and Quidthovitse provinces are on the brink of ...
5
votes
3answers
909 views

Complications of displaced core material?

If there were an absolutely terrible accident, and part of Earth's core was displaced toward the surface, making a bubble of liquid nickel and iron, what would be the major problems with this?
4
votes
2answers
213 views

How Would Plate Tectonics on an Inverted World Work?

Recently, I came across an inverted world map on the MapPorn Reddit made by MChainsaw. "Inverted" as in, the "continents" are now below sea level and the "ocean floors" are high and dry. (...
12
votes
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....
-1
votes
1answer
159 views

Do any of the things happening on this world actually have a chance of happening? And if they do, how long would humankind survive? [closed]

In this world, global warming has reached a tipping point. The equator has reached temperatures well over 212 degrees Fahrenheit (100 Celsius, 373 Kelvin), resulting in the "Boiling Sea". Global ...
2
votes
4answers
189 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
votes
18answers
3k views

What aspect of planet Earth must be changed to prevent the industrial revolution?

I am thinking of a planet (I suppose one would call it a parallel earth) where the industrial revolution never happens, and people live with 1700s technology forever. What differences in resources/...
1
vote
0answers
56 views

Would it be possible for an analog of humans to evolve in the oceans - Specifically Octopoids? [duplicate]

Humans are tool users and through their ingenuity were able to hunt much larger animals than themselves. Specifically, I would like to have a race of sentient beings based on octopuses. They use ...
8
votes
2answers
134 views

What geological and chemical changes to the earth's makeup could effectively limit technological advancement

Basically, I want to freeze the technology of earth at a level reminiscent of pre-Industrial Revolution Europe. I'm trying to figure out what substance or material would have to be absent from the ...
3
votes
2answers
108 views

How would an Earth-like world that is packed solid work?

By packed solid, I mean it has very fast growing vines and bushes everywhere like on non-desert living land plus lead crud and hidden small holes so movement is severely restricted. Similar on ...
5
votes
2answers
164 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. ...
1
vote
3answers
109 views

Government power in an Ice Age [closed]

The setting of my story takes place during a future Ice Age, where the equator and parts of the southern hemisphere are a safe haven for humans. Which countries or regions would most likely be the '...
2
votes
1answer
257 views

Only changing the mass of the moon, how much can lunar mass increase before the Earth becomes uninhabitable?

Bonus: How much would the increase in lunar mass increase average tides? & which factors would cause the Earth to become uninhabitable?
1
vote
3answers
119 views

What Else Could Create Jeffrey Linn's Coastlines BESIDES The Influence of Ice? [closed]

Who? Unfortunately, I could not find any background information about Jeffrey Linn, but he is better known for his sea level maps. Specifically, what a particular city would look like if sea levels ...
3
votes
2answers
116 views

How to make my shadowrealms respected [closed]

My world is collaborative post between me and my friend. So, There is one nation that I'm fleshing out and it was overall a fun but I got writer's block. Most of the evil shadow empire have ...
0
votes
5answers
115 views

How Can the Coastlines Look Similar In Spite of the Cooler Temperature

The established fact is that the shape of a planet's continental coastlines is determined by the planet's climate. Higher temperatures mean less ice, which ultimately means higher sea levels. (Case ...
0
votes
1answer
192 views

How would floating islands work? [duplicate]

Soaring among the clouds over an earth-like planet, islands... on which fortresses are built for strategic advantage, on which stations for the dragon air force are built, and which can be relatively ...
2
votes
4answers
190 views

Is it plausible that a world could develop that focused on the hard sciences and not the soft sciences? [closed]

I am new to this so I may ask this question wrong or without enough detail. The world I am creating goes like this: Humans developed to the point that robots run basically everything via A. I.s. As a ...
1
vote
1answer
202 views

Electric muscles

There is a popular belief that the muscles of our body are controlled only by electrical impulses. This is not entirely a lie, but ... From what little I have researched, the nerves send a command for ...
4
votes
3answers
524 views

Building a full-sized Lego Earth - what would it look like at various levels?

Lego representations of Earth have been made at various scales, for example this one: Suppose Slartibartfast made a full-size Earth from Lego (including the oceans being represented as solid blocks. ...
5
votes
3answers
220 views

Could Multicellular Life Evolve Sans Cryogenian?

Prior to the Cambrian, there have been three separate ice ages--the Huronian, from 2.4 to 2.1 billion years ago; and the two Cryogenian ice ages, from 720 to 635 million years ago, split in such by a ...
1
vote
6answers
355 views

After evacuation to a new planet, how would a population switch from a barter system to a monetary system with banks?

Okay, context. There's a modern human sub-species (about 9,000) that needs to evacuate earth to avoid genocide from their human counter-parts. They have access to a portal to take them to a new viable ...
8
votes
1answer
281 views

Is this a plausible timeline if the United States legalized prior restraint following the Pentagon Papers?

In actual history, the Supreme Court ruled in 1971 in New York Times v. US that prior restraint is illegal, upholding its earlier decision in 1931 in Near v. Minnesota. In my alternate history, the ...
3
votes
2answers
952 views

Humans without fire?

Suppose anatomically modern, but technologically primitive, humans (say, early Paleolithic) were magically transported to a world broadly similar to our own, but where open flames are impossible. (I ...
5
votes
4answers
188 views

How to make a floating islands on future earth?

So my current book set in distant future on earth where earth surface only covered with oceans with no more land mass ( kinda like a water world ) and the only lands are floating islands that made ...
-3
votes
6answers
456 views

Can magnetism be what causes my flat Earth to accelerate?

It has been determined by observation of the stars that the gravity on Flat Earth is due to it accelerating upwards at 1G. This is what holds people and objects to the surface. It has also been ...
3
votes
2answers
343 views

Can Mollusks Develop Bone Independently?

When one thinks of a shelled cephalopod, odds are high that the first thing to come to mind are the ammonites. They were one of evolution's success stories, thriving from 400 to 66 million years ago. ...
1
vote
4answers
195 views

Astral Doubles (Avatar)

This might be entirely opinion based which is frowned upon in world building but I really do need help on this. I’m writing a story of an alternative version of Earth where almost 80% of its ...
5
votes
2answers
1k views

How long would it take for Earth to be eaten to its core? [closed]

If the Earth was edible, and was the sole source of food for its inhabitents, how long would it take for people to eat themselves off the planet? Assuming a biblical creation story (a man and a woman)...
20
votes
4answers
4k views

Finding real world historic examples of cultures/organizations/tribes to represent Orcs

I plan to make this a series of questions to avoid being overly broad. Each question will address a particular fantasy species ("race" in RPG terms). The traits will be based on the content included ...
-1
votes
1answer
131 views

If modern civilization collapsed, what impact would a lack of trade and industrial base have on the next civilization centuries later? [closed]

Let's say that civilization ends due to non-globally destructive means. For instance, a rising tide that destroys ports and trade wouldn't scar the landscape of Denver the way nuclear war would. ...
2
votes
9answers
1k views

Building my Flat Earth, how to make my Ice walls last for eternity [closed]

In a world where Earth does NOT have gravity (Gravity does not exist). Our oceans are created by Ice walls. Ice walls? How can they exist so long? In the Flat Earth model, the Ice walls are situated ...
1
vote
0answers
67 views

Flora and fauna from a darker, foggy planet [closed]

In a previous post, I consulted about the characteristics that a earth-like planet could have, if it's covered by a permanent mega-fog, with a chemical composition similar to water vapor, which ...
-3
votes
3answers
359 views

In This Alternate Europe, Where Does Mediterranean End and Cold North Begin?

So, in this alternate Europe, there are some obvious differences. First off, the Baltic Sea is no longer a sea, but now the Baltic Plain. Also, the Low Countries are absent entirely. There are only ...
1
vote
1answer
201 views

If Earth's Moon Were Ganymede-Like, Part I: Rotation

I know that in the past I posted questions on if specific bodies larger than the moon--Mars in one and Titan in another--but this series deals with questions regarding Earth's effects by a natural ...
3
votes
3answers
172 views

Can A Theia-Like Object Make Earth Richer?

Let's start with a little backstory--our planet underwent an impact-coalescence cycle only once, 4.5 billion years ago, when a Mars-sized object named Theia destroyed the infant Earth in a glancing ...
4
votes
2answers
136 views

All the Radioactive Metals Inside Earth's Core--How Would They Affect Convection?

In relation to a recent question of mine, this alternate Earth still has its core consisting of 84% iron, but the other 16% contains the greatest concentrations of all known species of heavy metals (...
3
votes
5answers
440 views

Avian Crocodylomorph

Today, dinosaurs, alligators, crocodiles, gharials and caimen are all that remains of a special group of reptiles called the archosaurs. Recently, it has been accepted by the public that birds did ...
-2
votes
1answer
198 views

In a world without Magic or Gods, what is the source of people's supernatural abilities? [closed]

I want to build a world, probably modern, basing most of the built world on Earth, just with different countries, history, etc. What I would like is to find a way to give people their powers, but ...
6
votes
1answer
2k views

If Earth's Core had ALL Of the Heavy Metals

Back home, Earth had gone through an impact-coalesce cycle only once. Since then, its core has been 84% iron, 6% nickel and the rest being labeled by The Encyclopedia of Earth: A Complete Visual ...
17
votes
5answers
3k views

Could deliberately induced Kessler Syndrome stop ICBMs?

In a previous question I asked how Mutually Assured Destruction could be made not assured. Most of the highly rated answers focused on political methods, but one answer raised the possibility that ...
18
votes
13answers
2k views

Noah's flood actually happened. When does science prove that it happened?

Plot Noah's Flood actually happened more or less as written. Suddenly appearing flood waters covered the Earth, excepting a few mountain tops, and all land animals had to wait it out on an Ark. The ...
2
votes
2answers
136 views

A Raptorial Parrot

This scenario is based on the kea, the world's only alpine parrot. Even though it eats plants like other parrots, it also eats meat, and therefore could be New Zealand's answer to the smaller diurnal ...
10
votes
4answers
2k views

Could humans wipe out all remaining wild vertebrates on Earth in one year, if no effort is spared in doing so?

Humans already exterminated more than 50 % of wild vertebrates individuals since 1970 1, 2. I was wondering if it is possible to wipe out the remaining 50 % in less than a year ? Note that, in this ...
1
vote
2answers
102 views

Creating an earth-like planet without a tropical rainforest?

What I have I plan to create an 'alternative timeline' for the earth, which means most of the earth's features are identical, the only major difference is, that humans appeared at another time, so ...
12
votes
5answers
819 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, ...
-4
votes
1answer
124 views

Gravity Change on Earth [closed]

Ok so hypothetical situation, the gravitic force of the Earth is changed. Let's say that the Earth still revolves around the sun, and the moon still revolves the Earth in the same way, but within our ...