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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.

3
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3answers
146 views

Can trees and plant life grow on rock?

So I’m creating a world where the ground is mainly made of different rocks and stone in most areas - soil is sparse. Could trees and plant life grow on the stone ground if a water source is nearby? ...
12
votes
4answers
3k views

How tall can you build a mountain chain of bricks?

My ancient golden dragon has a lot of time, since he doesn't die of old age in my world, and a lot of magical constructs that will tirelessly built a defensive mountain chain for him. This chain will ...
7
votes
10answers
2k views

What mechanisms need to be in place for an advanced, peaceful society to retain high testosterone levels?

While by no means a smoking gun, there is still a reasonable amount of empirical evidence on the notion that socialization and testosterone are negatively correlated. Archaeological Evidence From ...
-2
votes
2answers
117 views

How to keep a country rigorous when not at war? [closed]

I'm trying to create a world that has a strong military and good citizenship even in times of peace. I'm kind of stuck at the moment, but I have done some research already, so here is a brief case ...
29
votes
7answers
5k views

How can I make raindrops bigger?

I've got an intelligent humanoid species living on a planet very similar to Earth's. However, on this planet, rainstorms are more frequent and slightly... different. Each raindrop is at least an inch ...
29
votes
8answers
4k views

How would trees communicate?

An alternate world is populated by mainly intelligent trees and other plants. These plants are almost exactly the same, biologically, as Earth's plants. The world's climate and geology are very ...
7
votes
5answers
615 views

What kind of “space force” would be needed to protect space assets in the near future?

Premise Even at present day, space assets are very valuable: Our space assets, day by day, are growing by leaps and bounds. It's the value of that satellite to the economy. - Neil deGrasse ...
7
votes
5answers
307 views

Barring all structural and stability issues, how would building a ringworld around the earth affect it?

I've looked for an answer for this, but the only information I could find dealt with the ring itself. All I want to know is what would change on the Earth if all problems were solved and the ring were ...
4
votes
6answers
201 views

Imposing scientifically derived requirements for holding public office

Earth Here on Earth, who serves in public office depends a handful of factors -- some of which are unsettling. In the US there is the infamous Wall Street-Washington Corridor where financial ...
4
votes
1answer
188 views

How to make a bigger planet be as similar to Earth as possible

My fantasy world is slightly larger than earth so that discovery of the continents becomes harder (about 20% surface should do it). But at the same time I want to preserve most aspects to make it like ...
9
votes
1answer
358 views

Can someone help me with ocean currents? I'm really confused

I've been working on a constructed world which started out as the home of an alien race from a sci-fi story I'm writing but just became a pure world building project. As you can see from the map it ...
8
votes
7answers
1k views

Extreme adaptation: evolutionary narrative for Vantablack-like skin pigment

Premise Inhabiting my earth-like world will be humanoid beings that have a skin tone that is as dark as Vantablack. Let's assume these human-like beings share the same ancestry as humans and we can ...
1
vote
1answer
152 views

Near spherical alien species - How can they move?

The setting On an Earth-like planet but with completely different flora and fauna there is the Great Plain. It is similar in size to the Serengeti National Park on Earth. The Plain is surrounded by ...
13
votes
8answers
1k views

Towers to Low Earth Orbit - How to make them usable for navigation

In a world I'm constructing the sun, the moon, and the stars are not visible but there are tower that stretch from the ground to, roughly, low earth orbit. Each one is around 200 meters in diameter ...
1
vote
9answers
512 views

What Could Cause A Kingdom To Keep Slavery Despite the Royal Family Refusing To?

Slavery in my story's world is common. Most don't see it as a good thing and slave-owners are rarely liked, but slaves are common enough nonetheless. The royal family had personally stopped using ...
-2
votes
1answer
87 views

Prerogative of future world [closed]

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
votes
2answers
141 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
votes
3answers
152 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
votes
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
votes
4answers
283 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 ...
5
votes
2answers
260 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
votes
2answers
128 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 ...
9
votes
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
vote
1answer
161 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" ...
2
votes
9answers
284 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
votes
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 ...
19
votes
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
votes
5answers
510 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
votes
0answers
153 views

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

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 ...
-5
votes
2answers
105 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
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 ...
5
votes
2answers
160 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
votes
4answers
193 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
votes
11answers
6k 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
94 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
214 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
votes
4answers
182 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
vote
1answer
94 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
110 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
votes
5answers
328 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
votes
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 ...
18
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
vote
0answers
60 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
votes
4answers
370 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
175 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
votes
1answer
142 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
vote
2answers
95 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
191 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
votes
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 ...