Skip to main content

Questions tagged [caves]

For questions related to underground naturally occurring cavities, can be large enough to use as shelter/homes.

Filter by
Sorted by
Tagged with
3 votes
4 answers
344 views

What would be a good reason why all life has to stay below ground?

I want a natural reason why nearly all life would be in caves, or built structures beneath the surface. Here's what I'm looking for: The surface of my planet should instantly kill most species. They ...
Sam Moon's user avatar
  • 631
1 vote
2 answers
57 views

Would caves maintain a cool temperature in a climate with very hot days and cold nights?

If the surface temperature is 60°C in the day and -40°C at night, with an average of 10°C all year, would the caves maintain a stable temperature?
Sam Moon's user avatar
  • 631
10 votes
4 answers
2k views

Would caves maintain a cool temperature on the hot side of a tidally locked planet?

I've heard it said that caves on Earth are roughly 10°C/50°F regardless of the temperature at the surface. Does this hold up if a planet is very hot? How hot could temperatures get above ground while ...
Sam Moon's user avatar
  • 631
7 votes
2 answers
3k views

A man wants to create a bomb shelter in a small cave on his land, but there's no visible water source, except a dripping wall. What to do?

A man who wants to live in a hidden cave on his mountain property in the Pyrenees has hired a caver to evaluate the cave as a bomb shelter in case of a nuclear war. The cave is small compared to most ...
Susan Etchey's user avatar
8 votes
4 answers
2k views

How many miles of subterranean caverns could exist unknown to science?

In a setting I'm working on, a creepy fungus-based ecosystem exists in a cave network below the Earth's surface. I don't know how/if this is an answerable question, but -- how many miles (I don't need ...
BZawhi's user avatar
  • 99
5 votes
10 answers
3k views

Goblins are Vulnerable to Fire and Light -- What Weapons Should we Use?

I’m doing a project about secret agents in the same vein as MIB but it’s set in the year 2050 and instead of aliens they deal with monsters similar to goblins. The goblins evolve, growing from ...
Foreign KT's user avatar
8 votes
1 answer
247 views

What is the most massive naturally occurring object that could support a void in its center?

Remember Journey to the Center of the Earth? The premise is that there's some kind of cave in the center of the Earth, which has an ecosystem inside it. Well, of course you can't do such a silly ...
Axion's user avatar
  • 1,154
2 votes
1 answer
75 views

Is it possible for water-based organisms to survive in a small crevice?

Situation In my story there are complex organisms that are essentially sacks of water with organs and are the size of a basketball. They have so advanced technology that they built a city in a large ...
joyoforigami's user avatar
7 votes
2 answers
1k views

Is it geologically feasible for a mountain cave system to allow passage from one side of a mountain range to another?

I have a mountain range that separates two places that certain people will want to go between fairly regularly. Right now they have to travel around or over a mountain range to do that. I've been ...
Reciter of Poetry's user avatar
1 vote
3 answers
408 views

What type of birds can live in my systems of caves?

The story I am trying to write happens underground in system of caverns that originate from either underground rivers or a massive roots system that have begun to rot. Creating mostly long spherical ...
Bougainville's user avatar
5 votes
3 answers
1k views

What changes might happen if a group of people began living in a cave full-time?

I've got a fairly small community of people that, after a genocide, some survivors moved into a cave system. They've been living there for about 5 or 6 generations now and rarely leave the caves ...
None's user avatar
  • 155
2 votes
1 answer
617 views

How realistic is finding ore veins in natural caves?

I used to play World of Warcraft and a few other MMOs for their crafting systems and always wondered what a fantasy RPG with a crafting system would look like with a more realistic distribution of ...
Arvex's user avatar
  • 3,034
5 votes
3 answers
542 views

What would these demons use in place of wood?

Demons live deep in the underworld. The underworld is a strange place: It is a cave system, composed mainly many extremely large caverns, with a few wide corridors connecting them. The ground of these ...
Ichthys King's user avatar
  • 16.2k
5 votes
2 answers
291 views

Could these demons exist?

The demons are large subterranean humanoids. They are human-like in form and intelligence, and around 8ft tall when stood up. Their face is elongated, with a vaguely canine-appearing snout. They have ...
Ichthys King's user avatar
  • 16.2k
4 votes
2 answers
210 views

How could this cave-dwelling draught animal evolve?

This animal is a domesticated animal that was originally found in caves, and is still used there as a draught animal. It is a horse-sized troglomorphic tetrapod that is capable of pulling its own ...
Ichthys King's user avatar
  • 16.2k
4 votes
1 answer
555 views

What would be the evolutionary drives of a lush cave environment?

Now, for my D&D-style world, there is an extremely large cave system hidden beneath a mountain. These caverns are illuminated by processes that are a bit too complicated to divulge, but in any ...
The Sophomore's user avatar
-1 votes
2 answers
187 views

How Much of A Planet-Sized Spaceship is Useable? [closed]

Okay, let's say we have a spaceship the size of a planet. Let's put the radius at 3 Earth radii, and the mass at 7.5 Earth masses. Its hull is made of a space metal with a density of 3500 kg/m^3, and ...
TysonDennis's user avatar
  • 2,380
2 votes
1 answer
316 views

Determining maximum cave depth

I am planning on making this planet of caves, and it has cave systems that dwarf Earth's. It's got carbon-based life, a chemical composition rich in copper, a good amount of water, and less gravity ...
TysonDennis's user avatar
  • 2,380
5 votes
6 answers
255 views

How would a civilization of cave-dwelling cats track dates? [duplicate]

I am in a slight dilemma. I have a civilization of cave-dwelling cats, that has been mentioned in numerous questions before this one. They have human intelligence, and they don't leave the caves. I ...
Jay's user avatar
  • 1,063
3 votes
2 answers
257 views

Most overall likely culture for cats living in caves?

Just like the title says. To give a bit of background, the group in particular is a group of feral cats with human intelligence. Only a few of the cats ever step onto the surface world (And only do so ...
Jay's user avatar
  • 1,063
9 votes
4 answers
2k views

Could cats sustain themselves in caves?

An odd question, yes, but a question I am asking anyway. I have a group of feral cats that lives in a cave system. They've lived down here for generations, and survival of the fittest weeded out the ...
Jay's user avatar
  • 1,063
19 votes
15 answers
5k views

Would it be possible for hunter gatherers to accidentally colonize an exoplanet, from an asteroid knocking a rock containing a cave into space?

I was thinking of a situation, in which a band of hunter gatherers goes into a cave, and while they are in the cave an asteroid crashes into the Earth, causing the rock that the cave is in to be ...
Anders Gustafson's user avatar
3 votes
7 answers
642 views

I need a possible way to flood a man-made lake located higher than sea level

I have a scenario where I need a man-made lake to overflow. It’s located higher than sea-level. There are underground streams which could be feeding it. It could have a channel to drain it into the ...
JBM's user avatar
  • 31
27 votes
12 answers
6k views

Without modern electronics, how could you determine your longitude, latitude, and altitude while lost deep underground?

Brief setting notes: it's a "basically earth" type situation, a spinning ball of rock in space with the same size and gravity and atmosphere and magnetic fields and everything else. The main ...
possiblySerious's user avatar
11 votes
2 answers
774 views

Planetary cave: Gravity inside a non-concentric shell

There are several previous questions concerning concentric shells. I won't reference them here because this is different. I understand that there is no gravitational effect inside a concentric shell*....
chasly - supports Monica's user avatar
7 votes
1 answer
233 views

Colonies in giant caves

My colonizing business found a small planet with about 0.8G. They would like to build the colony in the giant caves under the crust of the planet, due to the conditions of the surface,(little ...
Aaron's user avatar
  • 557
3 votes
2 answers
773 views

What is the evolutionary advantage of albinism in cave-dwelling animals?

In a story I'm writing, there is a species of extremely rare cave dwelling bird. A scientist and a plummer have to find a specimen of this bird before it goes extinct. When they finally find it, the ...
Ttagmonster1345's user avatar
11 votes
1 answer
469 views

Simulating Cave Formations

Having recently been to Mammoth Cave National Park, I've been considering the caves of my own worlds, and more specifically their formation. Now while not all caves are formed from limestone, it is ...
Pleiades's user avatar
  • 2,280
2 votes
2 answers
548 views

Average Speed when Caving

I have some underground travel (walking/climbing) by humans that I need to calculate time for, so I am looking for some "baseline" to go by. As such, I'm trying to figure out the average speed of ...
ScottS's user avatar
  • 420
5 votes
2 answers
197 views

Is it possible to create a giant, water-powered music box?

On another world, there is giant ravine leading into a cave where a sentient species live (Let's call them Cavers). They have limited access to materials; the only resources they have are rocks, ...
Leena Valtapaz's user avatar
9 votes
5 answers
3k views

Giving Tolkien Architecture a Reality Check: Dwarvish Kingdoms

Having escaped Isengard and left Rivendell, we are off to destroy the Ring. Our first stop--Khazad-dum, known contemporarily as "Moria". Being a Dwarvish kingdom, the problems I see with Moria are ...
JohnWDailey's user avatar
  • 14.6k
1 vote
4 answers
356 views

How could I have massive subterannean space on my world?

I would like a world with a big LOT of subterranean space to explore, colonize, and trap ancient evil beings. Now, while the questions about food and ventilation are well adressed on Worldbuilding, I ...
GlorfSf's user avatar
  • 452
8 votes
5 answers
3k views

Is it possible to have an underground swamp inside a cave?

Acording to my understanding of the word "swamp", we must have at least 3 components put together: Water in abundance Vegetation Soil for the vegetation to take hold (and eventually to produce mud ...
Pedro Gabriel's user avatar
6 votes
3 answers
344 views

How much Light energy would it require to run an underground Photosynthetic ecosystem?

I have a world that consists of hundreds of different caverns inside an earth-sized planet. Each of these many caverns consists of many different biomes, such as plains, Jungles,deserts,etc. However ...
Red_Wasp's user avatar
  • 1,515
9 votes
3 answers
821 views

How thick should the roof of a large cave be to safely build a city on top of it?

Fullmetal Alchemist (2003) features a giant (and I mean stupidly big) cave under a large and busy metropolis. Nobody is aware of its existence, which means that at least since the city's founding (let'...
Notiophilus's user avatar
14 votes
9 answers
6k views

How could a planet have zero surface caves?

What could cause a planet to naturally have zero caverns with surface openings apart from small impact hollows in the sides of craters and crevices carved in cliffs? To be specific, zero large ...
Noble's user avatar
  • 1,252
4 votes
1 answer
488 views

What prevents Dungeons from collapsing?

One of the ideas I've had for a story is to have million year old subterranean buildings/cities/temples which have younger architecture built on top of them, resulting in a "dungeon" which would be an ...
Eloc's user avatar
  • 1,250
19 votes
3 answers
4k views

What is the oldest a cave could possibly be?

What is the oldest a still extant cave on Earth could be? What conditions could encourage the longevity of a cave? It seems that the oldest known caves, the Jenolan Caves in Australia, formed in the ...
tinydoctor's user avatar
12 votes
5 answers
511 views

How do lever controlled mechanic structures in dungeons work and how feasible they are?

This has been bothering me for a while but I was reminded of it when I started playing Skyrim again. In the dungeons there are some mechanic works, examples including: Lever controlled heavy doors ...
Gokhan Kurt's user avatar
7 votes
2 answers
1k views

Can food be grown/raised underground in a sustainable way?

Is it possible to grow plants or raise animals underground, in a way that is enough for 1 person to survive and easy enough to maintain? Conditions: underground; without any on-going help from the ...
afaf12's user avatar
  • 171
5 votes
2 answers
710 views

Largest possible artificial cave chamber

A massive empire has decided, for cultural reasons, to build a massive, massive artificial cave chamber underground. They're willing to set aside 75 years for this project (about thrice the time it ...
Ranger's user avatar
  • 17.5k
3 votes
2 answers
175 views

Are lunar caverns expected to exist? [closed]

Are there underground caverns on Moon or Mars? Are they expected to have air (vel: some gas) inside? Do we already know of any?
jaboja's user avatar
  • 866
1 vote
3 answers
419 views

Can Dungeon Monsters work together?

After asking why monsters do not leave the dungeons, it was explained that they required mana to survive which is scarce outside the dungeon. However what was puzzling for me, was the fact that the ...
King of Snakes's user avatar
2 votes
4 answers
647 views

Is it possible to create a consistent timer using only gravity?

I've got a cave civilisation who have never seen the Sun, and don't have much of a concept of time. I was inspired by a Reddit post from someone with a similar situation, and like me, the OP was ...
Lou's user avatar
  • 172
44 votes
11 answers
6k views

Migrating Dungeon Monsters / Why do monsters not leave the dungeons?

Background : Consider a typical dungeon, which has weak monsters at the top and the lower you go, the stronger the enemies become. Some questions about dungeons have already been answered - why are ...
King of Snakes's user avatar
5 votes
10 answers
8k views

How would a cave civilisation survive underground?

All I know so far is, they're a developed culture of humans who live in cave networks underground, made fit for life. They speak their own language, and they have some contact with outsiders, with ...
Lou's user avatar
  • 172
23 votes
8 answers
8k views

How could a human civilization have happened to live underground, in Antarctica?

Let's assume a human civilization have been living for centuries, nay millennia, in a very large cave, not too deep under Antarctica - deep enough not to freeze, but shallow enough not to die because ...
user avatar
3 votes
3 answers
464 views

Someone born and raised without light

Please note: I've seen this and this, but my question is different as it is about a single human generation. If a child was born and raised in an environment with a lack of light, (i.e. a cave, or ...
ruckus's user avatar
  • 304
18 votes
4 answers
3k views

Dungeons in a Medieval fantasy

Suppose the typical Medieval fantasy world with elves, humans, dragons, magic, politics, society, and the rest, such as is found in countless open-world games. Open-world games encourage the player to ...
Frostfyre's user avatar
  • 25.2k
9 votes
3 answers
559 views

Is it possible for a language/method of passing information based purely on touch to develop?

Picture a race living in a cave with no light. Their entire existence pivots on remaining quiet and scentless enough that the various (and vicious) predators hanging from the roof of the cave don't ...
Joe Bloggs's user avatar
  • 66.4k