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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.

0
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1answer
63 views

Prerogative of future world [on hold]

It is a thousand years in the future. Humans brains are obsolete for thinking and are used only as a central control center for organ commands and heuristic processing (reactionary or first impulse ...
4
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2answers
130 views

Compass on a Ringed, Earth-like Planet

Is it necessarily a given that a compass (as they magnetically function on Earth) could be made to function similarly on an alternate, Earth-like, ringed planet? Another way of asking: is it feasible ...
6
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3answers
123 views

How to navigate a ringed planet at night?

I'm working on a story set in an Earth-like world but with rings (say, proportionately similar to Saturn's). I'm trying to get a solid handle on how these rings would affect the sky. For the ...
40
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13answers
9k views

Multiple “keys,” multiple “doors”. Any “key” fits any “door” but a “key” can only be used once. How could such mechanic be described lore-wise?

I am working on a souls-like game and I would like to have an item that works like Fragrant Branch of Yore from DS2. I do not want to copy the concept of petrification from DS2 so while the item ...
4
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4answers
258 views

What requires more destructive energy? Destroying a planet or splitting a planet in half

I just wanna ask which option requires more destructive energy? Option 1 : destroying a planet like earth to rubble (tiny pieces of rocks) Or Option 2: splitting a planet like earth in halves (2 ...
6
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2answers
256 views

3-Level Roadway Engineering

I'm the city designer for a new city we're calling Morrowville. Having some of the worlds top minds, flying cars have been invented, but can only fly a few feet (2-4) from the ground and not everyone ...
0
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2answers
113 views

A Frozen Metropolis

Scientists have discovered an Earth-like planet in another solar system, with the same gravity, atmosphere composition, etc, and they decide to colonize it. There is only one problem, though. It is ...
8
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6answers
5k views

A Planet Where The Four Seasons Occur Multiple Times In One Year?

Earthlings, I live on a world where most places on my planet has four seasons, just like yours does. We also have one sun and one moon, presumably. It's been not even a year since I came of age (20), ...
1
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1answer
132 views

What would force the “illuminati” to cull the world? [closed]

Premise This is an uncomfortable topic, perhaps even bordering on distasteful. That being said, the world I have in mind will not be complete unless I can settle on a threshold that the "illuminati" ...
3
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9answers
264 views

How to explain the presence of a dense debris field around Earth?

I'm creating a sci-fi world similar to ours roughly 50 years in the future. Unobtanium, a futuristic metal and fuel source, was discovered in 2020. Its broad utility led to rapid advances across all ...
0
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3answers
1k views

Would simultaneous hermaphrodites wage war?

I have a world where populated by simultaneous hermaphrodites. Which are like human women plus male reproductive organs, penis and testicles. They could father children like human males, and bear ...
18
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9answers
5k views

How can I test to find the continent's “best” young mages?

Some background The gods who have watched over us for so long are clearly angry. They've sent us this terrible trial in the form of a giant dungeon and told us if we can't complete it they'll wipe ...
13
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5answers
496 views

Could people survive on earth if a day lasted 100 years?

Imagine we took earth and slowed it down so that a day lasted 100 years, could humans (or any life) survive? Let's assume that there are no ill effects of slowing it down, no massive tidal waves, no ...
4
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0answers
148 views

How can I change life on a planet and the presence of Nitrogen in the nitrogen cycle and what effects are there [on hold]

Nitrogen makes up most of our atmosphere, it gets fixed by bacteria, legumes, etc., and enters the soil in a different form to be used by plant life. The nitrogen gets buried in sedimentary rock over ...
-4
votes
2answers
82 views

If a new planet was discovered & became a spot of constant tourism, would that decrease car pollution and give the earth's climate time to heal [closed]

if a new planet was discovered and it was possible to live there and was not too far from earth, and after it was made suitable for human life and so on and became a spot of constant tourism, would ...
2
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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 ...
5
votes
2answers
116 views

What would be the fastest method of detecting and destroying drone intruders in a geomagnetic storm area using modern technology?

In my world, I have a geomagnetic storm generator that conceals an island from major governing bodies in an Earth-like setting. I learned that exploratory drones would be unable to transmit findings ...
5
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4answers
184 views

Why would smaller be better for anteaters?

In the world of this question, ants and especially termites are the dominant herbivores by mass. There are no large grazing mammals competing with the bugs for the siliceous grasses and thorny trees ...
12
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11answers
5k views

How can Ganymede have an Earth-like gravity without us having realized it?

Imagine a small primitive humanoid civilization that developed independently in caves under the surface of Ganymede. We can assume there's enough light that filters through the crystalline surface to ...
3
votes
1answer
81 views

How do I figure out the size of an Earth-like world's layers and composition of elements

After getting help from the members of this site with Worldbuilding an Earth-like world around an F-Type Star, I have another question. The Planet's radius is 90% of Earth's. The Planet's rotation is ...
5
votes
2answers
205 views

What are reasonable rotation rates of an Earth-like world?

I have the radius, volume, mass and density figured out. It does not have a moon. I do wonder how that will affect the rotation. The Earth's rotation was considerably faster before the creation of the ...
0
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4answers
173 views

How to manipulate a town to improve it? [closed]

So there's this town of 80.000-90.000 people which grew quickly with the industrialization boom, but nowadays there are no big companies here, nor good opportunities for young people. So the youth is ...
1
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1answer
74 views

How can changing environments make my super-villain super-powered while causing chronic (extreme) pain? [closed]

I have a super-villain who is from another environment( e.g. aquatic, extra-terrestrial, extra-dimensional ( Bonus points for the least extreme from populous land-locked earth )) They are not a ...
9
votes
1answer
106 views

Monster hurricanes to scrub islands clean

We have an Earth-like planet except the tropics around the entire planet are covered with small island chains and archipelagos. No landmasses larger than Cuba appear between 35$^\circ$ N and 35$^\circ$...
10
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5answers
250 views

Can corals build faster than the ocean takes away?

Setting In a tropical shore, where a great river empties into the sea, there is a zone of very high tides. The water level rises and falls by meters every day. In this challenging ecosystem, ...
7
votes
4answers
1k views

How to have high tides in the tropics?

The Bay of Fundy sees the world's highest tides, with ocean water advancing and withdrawing as much as 20 meters or more within a single day. Here is a list of the 50 tidal stations around the world ...
28
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5answers
6k views

What do you make bricks out of in the rainforest?

Problem statement There exists a thriving Bronze Age civilization in a gigantic rainforest, bigger than the Amazon and Congo put together. This civilization is built in on the flood plains of a might ...
17
votes
11answers
5k views

How can a portal that connects two planets affect the environment?

In my world there are two planets within the same solar system, which are connected approximately every seven cycles through a portal that opens for a few days. The planets are very similar. The ...
1
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0answers
58 views

How big could a planet be and still have earth like conditions? [duplicate]

I am building a world that I would like to be as big as possible and still have very close to earth like conditions, gravity, weather, seasons, life and other things that are similar. Would things ...
13
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4answers
328 views

Can the Mongols conquer France?

Background In the mid 13th century, France was without a doubt the richest land of the West. Inside its modern borders there were perhaps 18 million people, and maybe more, at that time perhaps 1/5 ...
3
votes
3answers
164 views

What's the most effective clothing in a pre-industrial world of aggressive plant (and animal) life?

I'm building a highly verdant, "garden" world where fruit and vegetation grow so easily and naturally that they can be easily picked in passing by the relatively small human population. So, imagine an ...
0
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1answer
137 views

Oxygen producing metabolism

What kind of realistic oxygen producing reaction used by life could exist in a carbon dioxide / ammonia atmosphere? There are also many volcanoes, either immersed or not, water oceans and you can even ...
1
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2answers
85 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 ...
1
vote
2answers
173 views

Would the Earth with 4 moons still be habitable?

I'm currently writing about an Earth sized planet that is 33% water and has 4 moons all the same size as our moon. All moons are 243,000 miles from the planet's surface and the planet takes 392 days ...
21
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3answers
3k views

What sort of beak would a bone marrow eating bird have?

My world is very earthlike and I am looking to create a bird that primarily eats bone marrow. I wanted my bird to crack the bones of the carcasses to eat the marrow inside. What would the ideal beak ...
7
votes
4answers
352 views

How could intelligence be balanced with a large muzzle?

My species of caniform-like creature has a relatively long muzzle because of its strong sense of smell. I would like to know how to give it a long muzzle with its large brain size. Members of this ...
4
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3answers
150 views

In an age of flying sailing ships, would airfoils be invented earlier or later, and what uses might they serve?

In the question What would an age of sail flying ship look like?, I wrote an answer which defines the type of flying sailing ships that I am considering for this question. To clarify matters, keel ...
1
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0answers
87 views

Number of planets in a habitable zone with large moons [closed]

I recently had an idea, and it involved moons. Excluding gas giants, roughly what percentage of planets in the habitable zones of their stars would have large moons like Earth does, as opposed to Mars ...
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4answers
118 views

Surely someone with explosives can take anything as a hostage? [closed]

You're a police officer. A few minutes back, your walkie-talkie crackled and you were told that the Criminals (an infamous group of criminals whose identities are unknown) have struck again and this ...
7
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2answers
545 views

Siamese Twin Planets?

Premise I want to explore the possibility of a planet that is extremely misshapen. If we were to extrapolate what we have observed from our solar system and the extra-solar planets discovered so far, ...
11
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9answers
3k views

Massive Meteor Net?

Premise Suppose a world has no other means to deal with a potentially devastating meteor impact than creating a net on the planet. Their hope is that the massive net will catch the meteor and slow it ...
10
votes
3answers
742 views

Can I monitor animal movements from space?

The Earth-like planet I'm working on is the culmination of years of labor by the galaxy's best scientists. It consists of fully artificial ecosystems, and is, for all intents and purposes, like Earth. ...
18
votes
7answers
3k views

How do I maximize a planet's wave height (on average)?

Premise I am in the formation phase of a fictional world. I would like one of its notable characteristics to be extremely large waves. On Earth, most of our large waves are triggered by earthquakes, ...
5
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4answers
468 views

Can a planet have soil in form of powdered gems?

Is it possible for planet to have gem mountains? That is to say, diamond mountain, emerald mountain etc. Is it possible for a planet to have soil as a mixture of powders that are different gems? That ...
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votes
1answer
123 views

A planet with 7 light sources [closed]

How can a planet(with inhabitants) possible with 7 different sources of light and heat? They can be satellites, stars or anything. The temperature level should lies between 5°c to 25°c and most ...
4
votes
3answers
179 views

Would this type of atmosphere be suitable for human life?

I've been trying to create a Earth-like planet but I'm not sure if my planet's atmosphere is breathable. (It's mostly the amount of helium I'm worried about). I've tried to make it Earth-like while ...
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3answers
152 views

In a world based in the 1700s, is it possible that someone created tools to aid or utilize magic?

If there was magic that works like telekinesis in a country similar to 18th century England, would the knowledge level and things that have already been invented/discovered be enough for someone to ...
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4answers
54 views

Optimal arrangement for habitable zones?

So, here's my issue. My setting's central conceit is that a myriad of human societies developed at relatively concurrent times across a large system separated by only a few light-hours. (There are, of ...
20
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6answers
3k views

How many tectonic plates should my planet have? And why?

While constructing a planet, with the same mass, volume and overall composition as Earth, how do I know how many tectonic plates should it have? And what does having more or fewer tectonic plates ...
8
votes
5answers
569 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 ...