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For a well developed high-tech country in a fantasy world, which substance has the higher possibility to be the backbone of their technology? [closed]

For a well developed high-tech country in a fantasy world, which substance has the highest possibility to be the backbone of their technology? I mean a physical substance, for example: A substance ...
301 views

Anatomically Correct Monsters, Incorporated

In the world of Monsters, Inc., the titular monsters have wildly varying morphologies and abilities, but they nevertheless all seem to be members of the same species; after all, if it was a multi-...
188 views

How could a small civilization move about normally, tactically, and quickly in a large swamp?

This is a small civilization (more than just a town or two) almost under the shadow of the regional hegemon. The dominant civilization knows they are there, but don't go too deep into that swamp ...
340 views

Can early astronomers determine the gravity of their planet's “moon” without ever going there?

As I was thinking about space flight for my world, I thought about how they would need to know a planet's gravitational force before they could land, and found that humans figured out the moon's ...
325 views

Scientifically accurate fuel for a small spaceship

I'm designing a small two-person spaceship for use in battles in space. It is set around the year 2100. It would be around the size of a tank (approx. 50 tons). It would need to be fast and easy to ...
162 views

What could cause a planet to be in shadow for a 6 earth month period every couple of earth years?

My previous question ruled out having a moon orbiting a gas giant. I've got an interesting ecosystem (my bad, biome was the wrong word) that evolved based upon the idea that the world is eclipsed for ...
5k views

Best Ergonomic Design for a handheld ranged weapon

I know I’m flirting with “Primarily Opinion Based” here, but I’m hoping there’s some established knowledge out there in the community that I might be completely oblivious to. If you look at pretty ...
271 views

Can a mammal and Oviparous have child together if they have similar external body structure?

There are two humanoid races are in my fantasy story. Race A is almost like humans, except they are in super human size, have super human strength, have a higher body temperature etc. Some sort of ...
659 views

How close to the Sun would you have to be to hear it?

Taken from this fascinating answer: The Sun is immensely loud. The surface generates thousands to tens of thousands of watts of sound power for every square meter. That's something like 10x to ...
185 views

Realistic Interstellar Energy Transfer

I've been reading some of the excellent answers on this question about galactic empires and it led me to imagine a reasonably realistic multi-system 'empire' might keep most or all of its population ...
154 views

Is it possible to calculate how long a moon takes to orbit a gas giant?

if it takes the moon 6 months to pass through the gas giants shadow? Assume it is distant enough to not be tidally locked. The gas giant is 112.5 AU from the star. The star is 55 solar masses. It ...
8k views

Security measures that could plausibly last 150+ years?

So, the world experienced an apocalypse about 150 years ago. Sad times. Me and a couple buddies are the the salvaging business, and hello, recently we found a jackpot, an untouched military base. When ...
7k views

How would a lunar colony attack Earth?

I saw that there are many questions about how a lunar colony would defend itself. But in the not so near future the lunar colony might be stronger than Earth. They may have even suffered from attacks ...
198 views

Humanity with the Ears of a Fox--What Differs as a Result?

In this question, we're looking at a humanity that has adapted one of the most conspicuous ways of keeping cool--larger ears. Desert animals usually have larger ears to have more room for blood ...
314 views

What would it take to make catapults a alternate way to travel?

I have an idea for a futuristic way to travel for my Story. People get into a capsule, and it launches itself extremely fast in the air. What would be needed to make this happen for real and what ...
312 views

Can a machine benefit from stored heat energy?

Setting Overview My world suffers from an abundance of a particular type of energy. This energy can be safely absorbed and utilized by living cells, enabling, for example, a dragon's flight and fiery ...
8k views

Why would an invisible personal shield be necessary?

I’m trying to think of a reason why an advanced civilization would find it useful to invent an invisible handheld shield as protection against a civilization with primitive weaponry (sticks, stones, ...
357 views

How can chaotic entities be prevented from spreading beyond their domain?

This is a follow up question to one I asked earlier:How can religions be structured in ways that allow inter-faith councils to work? So, these gods are basically artificial intelligences that are ...
4k views

Can Papyrus be folded?

I want a character to invent the codex (that is, modern-shape books) in Ancient Egypt, which means that the primary writing material is papyrus. However, most book binding processes involve sections ...
319 views

Is it Possible to keep an egg alive for centuries?

Is it possible to keep the egg of my humanoid character without hatching for centuries, but still able to hatch when proper care and the appropriate environment is provided? My planet is a extremely ...
194 views

Connecting Biomes

I'm in some urgent need of advice about linking together biomes in a realistic manner. Can a taiga connect to an alpine tundra to the north, and a steppe to the south? Then what would branch off of ...
7k views

What clothes would flying-people wear?

If there were people with wings, who didn't want to be naked all the time, what clothing could they wear, without it interfering with their flying? Note: I am assuming arm-wings, like birds, but you ...
5k views

Surviving a planet collision? [duplicate]

Let's say there are two planets about to collide. Ignoring how they got there, it seems that in most scenarios basically all life gets annihilated by energy released the collision. How slow would two ...
137 views

Mesas of hard(solid) light

I searched the site and found answers saying hard light can't exist. Apparently in the three years since the last question was asked, scientists started making inroads on making solid light a reality, ...
253 views

A character suffers little to no injury from channeling electrical energy. What would voltage and amperage feel like?

In a world where magic exists, a specific character can channel electricity in whatever way you might imagine. They are relatively immune to suffering physical injury even for high voltage or current. ...
3k views

How long until two planets become one?

Two Earth-like planets collide at a (relatively slow) speed of about 1,000 kph. For all questions regarding the size and composition of these planets, just think about Earth - and these two planets ...
2k views

117 views

Creating an Anatomically Correct Lusca

The Lusca (its name meaning 'Octopus Shark') is a cryptid from the Bahamas, supposedly a 6-9 meter (or even 23 meter) long man-eating Octopus that lives within the blue holes, dragging victims down ...
5k views

How could Nomadic scholars effectively memorize libraries worth of information

In my fantasy world there exists a nomadic people known as the Ròda. The Ròda believe in the collection of knowledge, lore, and more importantly spells. They practice their beliefs by travelling in ...
1k views

The Sword in the Stone

I am trying to recreate King Arthur's the Sword in the Stone using chemistry. I have a couple ideas how this could be done Would any of these work or how it might work? Arthur removes the sword from ...
186 views

Rogue Planet Illuminated by Galactic Centre

The black hole question reminded me of an idea I wanted to implement at some point in a space campaign, but didn't go forward with because I was unsure whether it's merely statistically very ...
145 views

Limitations of the interactions of fact and opinion thoughtforms in the Aethernet

The Setting Long story short, we cracked the code of the universe and then reprogrammed it to give ourselves admin privileges. But then, we realized that having top-level access is boring. There is ...
113 views

Ecological implications of osmotic portals

Suppose some magical civilization on Earth-like planet can create portals. Any given portal entrances are spherical surfaces of the same radius. Any particle enters one sphere and exits another in the ...
74 views

Alternate history where Italy finds oil [closed]

One of the most important resources in the world in the modern era has been oil, but arguably at no time more than during WW2 where many of the Axis' plans revolved around the procurement of a steady ...
286 views

How would a 4th trimester affect human development?

Newborn humans are born in a very undeveloped stage compared to other mammals. This is because if they stayed any longer in the mother, their head would become too big to fit through the birth canal. ...