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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.

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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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3answers
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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 '...
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1answer
195 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?
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3answers
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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 ...
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2answers
101 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 ...
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5answers
108 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 ...
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1answer
128 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 ...
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4answers
177 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 ...
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1answer
190 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 ...
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3answers
358 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. ...
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3answers
144 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 ...
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6answers
264 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 ...
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1answer
208 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 ...
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2answers
866 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 ...
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4answers
174 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 ...
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6answers
432 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 ...
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2answers
200 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. ...
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4answers
193 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 ...
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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)...
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4answers
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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 ...
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1answer
119 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. ...
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9answers
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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 ...
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0answers
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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 ...
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3answers
285 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 ...
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1answer
183 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 ...
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3answers
158 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 ...
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2answers
119 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 (...
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5answers
402 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 ...
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1answer
175 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 ...
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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 ...
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5answers
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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 ...
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13answers
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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 ...
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2answers
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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 ...
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4answers
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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 ...
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2answers
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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 ...
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5answers
732 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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1answer
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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 ...
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1answer
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How Would The Listed Towers Be Described? [closed]

In some foreseeable future, we have had transdimensional historians studying alternate Earths with multiple different points of departure, sometimes within the same Earth. In one of them, the Black ...
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3answers
102 views

Striving to develop a single-system management [closed]

I was thinking of a world like ours where everything, each separate sub-system works within a single-system management. I mean, a planet has one country, an empire, with one bank company, one building ...
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4answers
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How much dirt would be needed to be added to the Earth to cover most of civilization?

I am building a world where the new world is built on top of the old one, and the old world is kept under a layer of "immigrated" dirt from other worlds via portals. If there was a portal (or ...
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2answers
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Habitation of early Earth

Based on various methods of geological dating, particularly radiometric analysis, Earth is estimated to be around 4.5 billions years old. This is around the time the Earth's Moon was thought to be ...
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6answers
171 views

Can the location and structure of continents be altered?

In the novel I am writing one of the twists is that story actually takes place on a distant earth except it’s unrecognisable due to it being permanently altered by a long series of devastating wars. ...
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4answers
270 views

On a planet without gravity, how can water stay on the surface? [closed]

In a fictional world that is round, and has no gravity, how would you go about making the water not fall off the planet (Or even people, for that matter?. Is there some kind of futuristic force field ...
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5answers
148 views

Can Pinnipeds Fit in a Worm Forest?

In an alternate Earth, coral has been extinct for over 400 million years. In their place were the following: Bivalvia (clams, oysters, mussels) Cirripedia (barnacles) Canalipalpata (bristle-foot or ...
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4answers
183 views

A peculiar and complex cause for a war for over 2 centuries [closed]

Okay, so my world is basically classified into 9 quadrants, with 8 being land and the other being a single gigantic body of water. All of these land quadrants are separated from each other by water. ...
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7answers
456 views

Could an intelligent worm-like race invent and build computers?

We have a regular Earth as we know it, but instead of humans, there is this worm-like race, intelligent similarly as nowadays humans. Their inner physiology is different from our worms (and not ...
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1answer
119 views

The World's a Jungle Again. How Many Species Would Crowd the Continents? [closed]

In accommodation to my last question, we are now transferring from meteorology to ecology. Today, tropical rainforests take up only 3% of the world's surface, yet they take up half of the plant and ...
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5answers
598 views

Possible height and size of a giant tree on an Earth-like planet?

I'm working on a story about another dimension of this same Earth but without the same human development and history. The land and natural conditions would be the same except for the ones directly ...
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2answers
405 views

The World's a Jungle Again. Would Doldrums Blow the Global Air?

From 56 to 34 million years ago, Earth was so warm that we have found evidence of jungle plants inside the Arctic Circle. Nowadays, jungles are confined in or near the equator, and those latitudes ...
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1answer
103 views

A K-Type Binary Dawn/Dusk in the Equator

In this alternate scenario, Earth is the third planet in a binary star system. One star is a K-type main sequence star--or "orange dwarf"--that has 80% the mass of a G-type main sequence star--or "...