Questions tagged [earth-like]

For questions regarding planets similar to Earth in most respects. This tag should be used when describing a planet that follows the rules of Earth with exceptions outlined in the question. Usually questions using this tag will be about the differences and the impacts of those differences.

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The view of the sky from an Inverted/Hollow Earth?

Obviously there are plenty of potential physics problems with this scenario, but if people lived along the inner crust of the Earth, and there was a Sun-like core at the center with nothing else in-...
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5answers
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How would multi-race humanoid evolution happen?

If we were to pull the following races out of a D&D players handbook and remove them from the setting/history of Faerun and look at them from a biological/non-magic perspective (no other planes of ...
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Is molecular/transport beam cloning feasible for a quick reaction team to disasters?

In Star Trek, the Federation uses a a Transporter to disassemble the atoms that make up an individual and reassemble the said individual near another transport beam. It has been speculated (at least I ...
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What would happen when we take away the money on earth? [closed]

Let's say we have a world that is exactly, like in every single detail the same as ours. Then we clone that world and put it next to the first one. The second world is exactly the same as the first ...
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What percentage by mass of the earth's surface is water?

I am creating a fantasy world where a given race is mystically tied to the planet. Predominately this race will be earth-dwellers, quite happy and content to burrow underground, but I'd like some of ...
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1answer
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Physiological effects of living on a world close to a black hole

Let's say you were living on a planet near (but not too near) a black hole. I'm thinking of the planet Miller in the movie Interstellar. Obviously there are some strong tidal forces. But at this ...
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8answers
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Lighter-Than-Air Bridge Technology

Imagine a very long bridge (Visbi Bridge - named after the designer) across an immense canyon - really almost a wide deep gorge -use on an earth-like world. My concept is that part of the support of ...
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12answers
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What methods of transportation would develop in a Stone Age society in a forest world?

This is from the Sandbox. Star Wars fans, picture a setting like the forest moon of Endor, albeit planet-sized and without Ewoks running about. For everyone else: Imagine a dense deciduous forest, ...
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Jet Powered Animals

Looking at the recent questions on dragons and aviation bureaucracy has got me thinking about some animals I could include in my story. I want these animals to be jet powered. One of the answers on ...
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4answers
404 views

Is a spherical core and magnetic field possible in Cube world

Pretty self explanatory question...can the Cube Earth described at the link below support a spherical core and a magnetic field? How would a civilization that has been living on a "cube" ...
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How would a civilization that has been living on a “cube” Earth differ from one on a “spherical” Earth?

Another question based off of this one here. Let's say on a cube styled Earth-like planet, there was a similar race to humans. If the differences in the planets were minimal (besides, you know, the ...
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8answers
450 views

Arctic Airships, Part 2 - Navigation

This is the second question in my Arctic Airships series of questions. The first one is Arctic Airships, Part 1 - Generating Electricity. The setting is outlined in Part 1, but I'll rehash the ...
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Does an expansionist, monotheistic religion require a central prophetic figure?

This question builds on these previous questions: What common structures and systems exist in global organized religions? How to explain the co-existence of peace and violence in religion I am ...
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Arctic Airships, Part 1 - Generating Electricity

This is the first question in my Arctic Airships series of questions. The second one is Arctic Airships, Part 2 - Navigation. The premise: An Earth-like planet plunged into an ice age roughly 2,000 ...
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4answers
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How would plants be affected by a 48 hour day?

How would plants be affected by a 48 hour day, instead of 24 hour? Would plants be larger to store more energy for photosynthesis? Also, how about the temperature of the earth be different on both ...
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How to explain the co-existence of peace and violence in religion

If you look at religions in world history they are often a source of conflict. Disclaimer: Obviously this is not true of all religions nor is it a judgement on those religions for which it was or is ...
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8answers
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Third World Countries societies created and populated only by young people

Related, and in continuation to How would societies be if created and populated only by young people? In the previous question I asked about society as it would exist in western/first world countries ...
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What common structures and systems exist in global organized religions?

I am working on developing the cultural framework for my world and I have a singular religion in mind that plays a role in both the story and more relevantly the state of the world. To provide the ...
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7answers
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What could make an insect race intelligent?

TL;DR: I want a society which behaves as a hive. Is it plausible and how to achieve this? The setup: Different planet in our universe. In other words: Normal, physical rules apply, there is no magic ...
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9answers
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Cataclysmic event resulting in a region of glass?

I have in my world a "crystalline desert". The idea is that a major cataclysmic event turned the surrounding area into glass, color irrelevant. Then following the event, major earthquakes and the ...
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1answer
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What effect would a red sky and/or sun have on plants and animals?

If an Earth-like planet had an older, red sun — or maybe just a reddish sky due to some property of the atmosphere — how would that affect the growth and/or adaptation of plant and animal life on the ...
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An enviroment where a bird-like creature can survive on passive feeding

The question about a diet of dust brought up a few creatures that survive on dust, however they were all insect-sized or smaller. This got me thinking about the Blue Whale, which survives on a diet of ...
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What could cause an avian species to become intelligent?

There have been a few questions about an intelligent avian species lately and they have gotten me thinking. It seems to me that it would be hard for an avian species to evolve to be more intelligent ...
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2answers
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How much force needed to blow open a planet?

I recently asked this question about what would happen if a fusion bomb went off in the core of a planet, and the answer was relatively uninteresting. As was aptly said in my previous answer, the ...
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6answers
713 views

Generating a Magnetic Field Biologically

I was answering this question about how a living planet-organism could be possible, and realized I didn't know how such a planet-organism could produce a magnetic field. I postulated that it could ...
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4answers
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Does an earth-like planet have to have Ice Ages?

When you look at the history of earth, the last ice age had major impacts on the flora and fauna of the world as well as biological migration. If I am creating an earth-like world and am developing a ...
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2answers
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Day and night temperature on an Earth-like planet with longer rotational period

DISCLAIMER: This question was closed on Astronomy Stack Exchange as off topic, so I'll try my luck here. I'm trying to understand the climatic effects of the far future scenario of an Earth-like ...
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Plausibility of Massive Maelstroms

Maelstroms are ginormous whirlpools. They can exist continuously in an area. They're cool. The question is, how large can they get? As large as an island? Could a maelstrom have a diameter of ...
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10answers
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What are the power options for intelligent humanoid robots?

In my future setting on Earth (or an Earth-like planet; haven't decided), the fields of robotics and AI have taken off and we have intelligent, ambulatory robots. (They were initially thought of as ...
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2answers
486 views

What is my bedrock?

I'm looking for a rock from which my island is constructed. It needs to be: Either created from the sea or via intense pressure/heat Capable of trapping layers of gas beneath it White(ish) I was ...
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5answers
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Humans born without legs: how would they thrive?

or, Anatomically Correct Weebles A group of behaviorally modern humans was cut off from the rest of the earth-like planet millennia ago. (Myths hold that the separation occurred four to five ka BP, ...
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1answer
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Biology of humanlike species within Buddhist and Judeo-Christian Realms [closed]

I have a world that I largely have figured out in a big picture sort of way. It's sort of a Buddhist realms style "multiverse" with multiple realms encompassing the true universe. In this multiverse ...
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What kind of star should I use for my world?

If I want an Earth-like planet, what kind of star can I use to achieve that ? According to the Harvard stellar classification, our Sun is a G-class star. The best would be to have: Temperature ...
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What is the likelihood that inhabitants of an alien planet similar to Earth geologically would have races?

First off, let's get definitions out of the way: A "race" here is defined as stable, heritable, phenotypic, clearly visual distinction between large demographic groups living in different geographic ...
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4answers
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A giant meteor, balancing destruction and life sustainability

So as a geographic feature and major historic event I have a meteor (and the resulting crater) idea in my head. The idea is that the meteor sort of resets civilization. Obviously I don't want it to ...
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3answers
327 views

How does the age of a planet impact terrain?

As the title suggests, what happens to a planet geologically and geographically over time? This question came to mind from the many sessions of Civilization I have played where when you set up a ...
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8answers
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How do I blend cultures - naming world features?

In my world I have a variety of nations and city states but I also have a history/background that means they are not and have not been completely isolated. In fact there was once a continent spanning ...
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How to Survive Mountain Environments With a Tribal Culture?

Assume we have an Earth-like environment. If a tribe with only early medieval technology were to settle in a mountain environment: What resources would be needed to deal with the elevation, cold, ...

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