# All Questions

19,802 questions
258 views

### Shooting down an enemy ship at FTL speeds

In the story I'm currently working on an alien race holds the monopoly on FTL travel. They're using a modified Alcubierre drive system, powered by Negative Mass. Humanity stumbles on a source of ...
889 views

### Preventing Technological Progression

Normally, technology in numerous fields will advance due to breakthroughs driven by a need for something like more efficient weapons or farming. How can I explain a civilization being "technologically ...
119 views

### Could Multicellular Life Evolve Sans Cryogenian?

Prior to the Cambrian, there have been three separate ice ages--the Huronian, from 2.4 to 2.1 billion years ago; and the two Cryogenian ice ages, from 720 to 635 million years ago, split in such by a ...
161 views

### Would fast decompression take place in a sealed tower on an Everest-sized mountain?

I have a large skyscraper-sized tower built at the summit of the highest peak in my world. At that height, I am aware that people need oxygen masks and other aids to survive for long and reach the ...
1k views

### Could someone reasonably clean off and return a child's toy retrieved from a radioactive fallout zone?

So... I've been playing a lot of the video game Subnautica lately, which put me in the mood for a "trying to cope with being marooned on an alien planet" sort of story; however, there's something in ...
132 views

### A proposed method of flying for superheroes

I can understand Super-beings' great strength and some of their other powers, but flying is hard to justify. I want to consider only superheroes that can actually fly rather than merely jump tall ...
117 views

### Tolerable range of surface gravities for interplanetary colonists?

Human physiology is adapted for life at 1G, but planets colonised by future humans will likely have different surface gravities. What is the range of values for surface gravity that humans can ...
65 views

### Technological Animal Control

In various TV series and movies villains or organisations have been shown to control animals through technological or cybernetic means, such as the future predators in Primeval. These creatures have ...
2k views

### Why would a drider lay only a small clutch of eggs?

In a very soft-science world, in a lush forest far away from civilization and their laws, especially the one about squares and cubes, lives a young, female drider. One day, while hunting for dire-boar ...
4k 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 ...
176 views

### Evolution in dragons

I'm currently working on a world where there are two groups of dragons, Continent dragons and island dragons. The basic story is that long ago there was one massive population of dragons that lived on ...
60 views

### How might an astronaut in a vacuum create an electrical field sufficient to affect a cloud of particulates?

My protagonist is in a sticky situation: floating in space (fortunately in a spacesuit) and about to be attacked by an alien avatar made from smart matter; tiny specks of dust which share a ...
3k views

### Insurance in a world with Superheroes

The less likely an event is, the easier it is to insure against it, as the risk is low. Meteor insurance, if it exists, is probably cheap, and still pretty profitable for the company, as the number of ...
1k views

### How might a purely mechanical 'voice' function?

In my world there are mechanical semi-humanoid automata. Would it be possible to make them speak in a fashion that sounds natural (i.e. human)? How might it function? The mechanism should be capable ...
248 views

### After evacuation to a new planet, how would a population switch from a barter system to a monetary system with banks?

Okay, context. There's a modern human sub-species (about 9,000) that needs to evacuate earth to avoid genocide from their human counter-parts. They have access to a portal to take them to a new viable ...
7k views

### How can a mortal woman successfully carry a demigod to term?

Demigods are special humans that are born partly divine. These individuals have been extremely rare throughout history, and always have various significant effects for the world around them, leading ...
38 views

### Creating a earth-like moon orbiting a gas giant that life can evolve naturally [duplicate]

We're trying to create a alien race physically very similiar to humans including carbon based chemistry but with completely different mindsets, culture and society because of the different ...
104 views

### Why would greek gods allow other religions to take over? [closed]

I am planning to write a story where greek gods exist. But I can't figure out a reason why they would allow other religions to take over and people to stop worshiping them. And I need this for my ...
151 views

### How long would it take for nuclear energy to become adopted in a world on the brink of collapse?

For reference, I'm going with the accepted answer given here: How would technology adoption of Lithium Air battery work?. In my world, it makes sense that governments would be very interested in ...
3k views

### How to naturally cool down a room on higher floors. When heat rises & there is no electricity

How to turn a room on the top floor into a colder not so humid and deathly hot one. In the times before electricity, a man has vast trunks of papers and documents he needs to store for a long time ...
9k views

### How to sabotage a blacksmith production? [on hold]

The city's main weapon and armor supplier has lost his contract arming the city's guard because the quality of the last batch of its products is awful. The swords break at the first clash, the armor ...
42 views

### Downsides of a Magnetosphere stronger that Earth's? [duplicate]

It is clear that a planet that possesses a weaker magnetosphere than that of the Earth will present issues (such as less protection from stellar radiation) to a potential human colony. However, are ...
197 views

### Viability of a robot/mecha body with jumping-stilt/Cheetah-blade-like legs?

Saw Pacific Rim for the first time with a friend recently; I'd never really thought too hard about giant robots/been as into Mecha and Gundam stuff as some of my friends before, but the Jaeger concept ...
107 views

### Sending Messages Back in Time [closed]

It's hundreds of years in the future, and it sucks. I want to send a message to the past using our advanced technology and warn them what to do and what not to do, so the future is better (or, ...
108 views

### What water generating technology would be required to create a planetary scale flood?

Aqadatio is a planet which is completely flooded. This flood was generated by its own government to get out of debt (long story). The inhabitants of this planet are technologically advanced, more so ...
247 views

### Explosive joints that allow people to jump really long lengths

How does a joint need to operate and be structured in order to allow a person to do leaps of 10 meters in length with ease and without taking a long run first? Here's an example of what I'm talking ...
117 views

### Are we at the end of our evolution? [closed]

I was wondering if it is possible that our bodies have stopped evolving, for instance in two million years will humans still look as we are now or are we going to have evolved into something different....
3k views

### How long can a preserved human body last before turning to dust?

Some Context The setting is a fantasy world with lots of magic where Liches exist. A Lich is "born" through a series of complex, dangerous and horrific rituals that a mage casts upon himself over ...
5k views

### Shield only combat

Asking this for a more realistic view for ''rising of the shield hero' and possible uses in future writings. A shield is not a weapon, it is basically armor, that's why heavy armored knights rarely ...
35 views

### Can a solar flare or coronal mass ejection cause a planet to heat up? [duplicate]

There is this setting I wish to use of a planet tidal locked to a red dwarf, in a Goldilocks/habitable zone/distance, that gets turned into, mostly, a desert due to a coronal mass ejection or a solar ...
46 views

### On the fate of the truths in the universe [closed]

Some context first: First, there is this result that extends Gödel's incompleteness which states (among other things) that given the set $S$ of all true statements, the probability that a statement \$...
18k views

### What (modern) weapons could be used to destroy skeletal enemies as completely as possible?

As per the cliché, after getting hit by a truck, our protagonist finds herself in a 'swords and sorcery' fantasy world. Also as per the cliché, she is granted an overpowered ability to make her new ...
203 views

### How long would it take a matter-antimatter GeV gamma ray laser photon rocket to get to Ross128b (11 light years away)?

I'm writing a colony story, and I want my ship to colonise Ross128b, which is 11 light years away from Earth. I need the characters to be alive when they get there, but it's okay if they've aged ...
5k views

### Could a giant excavator (like Bagger 293) breach an armored wall in a siege?

I am writing a siege battle that takes place on a fallen world. The defenders are behind a large steel reinforced wall (20m by 8m). The attackers, after suffering heavy losses, decided to bring in the ...
81 views

### Spaceship combat Similar to pre-airplane naval warfare? [closed]

In most Space operas, space wars involve battleships, fighters, energy shields, missiles , bombs and lasers (and sound in the vacuum of space). This largely mimics how planes and mother ships were ...
140 views

### How much heat would a 1km asteroid release into earth's atmosphere?

I am writing a theory for a game that is in an apocalypse. An asteroid is heading for earth and will crash into the earth regardless in this theory. It is 1km in size but due to the YORP effect it has ...
67 views

### Designing a somewhat realistic “Astomi”: Filter-Feeding Humanoids?

I've been thinking of reviving an old Fantasy idea of mine, and I recently came across a description of a group of mythological beings that piqued my interest, and which would actually fill a niche I ...
286 views

### Biological healer, how does it work?

How can a species force an external body to heal itself and speed up the process without the use of magic and technology but by biological means? Sanators are creatures who can force the body of a ...
195 views

### What is the “fullest” the universe could be in terms of living space? [closed]

Lets take a civilization that has surpassed the type III on the Kardashev scale. It has the following assumptions: It harnesses the energy of entire Galaxies, its populace did not transcend. If you ...
1k views

### Challenges for using a bull as a character's mount

I'm writing a character for a fantasy setting, and I wanted him to be a gruff half-orc war master whose mount is a bull. I wanted to know if there has ever been an actual historical use of bulls or ...
491 views

### Repurposing A Cargo Ship In A Post-Apocalyptic World

How would one go about repurposing a small cargo ship, no more than 50,000 tons, to run on an alternative fuel source/propulsion other than oil? And what alternative source would work best for ...
149 views

### What is the limit of an immortal being's memory? [closed]

-In my story, my main character comes across an immortal being, chained and isolated under a mountain for countless years; subsequently losing memories from her past over time, while still being ...
200 views

### What would the atomic structure of 'perfect' steel be like?

There are a number of structures in iron that are simply impossible to achieve on earth - for example, the Widmanstätten pattern of large, interlocking iron crystals that can only be found in ...
146 views

### How much equipment would be needed to set up a mining colony?

Setting: a mining colony on a distant world, exporting rare-earth minerals. As in many space opera stories, the world is a shirtsleeve environment with a reasonably pleasant biosphere. Tech level: I ...
197 views

### Will a civilization need to make weapons if their use of magic is limitless?

OK here's the scenario. After 1000 years, the elves were able to build a kingdom for themselves. They were given by their creator God the ability to wield unimaginable magic, magic that can shape ...
322 views

### What goes in, must come out - limitations of temporal displacement

I am plotting out a sci-fi setting, and trying to figure out the consequences of a non-conventional form of time travel. In the story, time travel has been achieved by means of temporal displacement....
1k views

### The Colonist - Part II: Landing

This is the second part of a series of questions I'll ask about a self-sustaining colonization ship. I'll keep editing this post as things unfold. If you can, check out the other questions of this ...
8k views

### How can you prevent a theocracy from being inevitable when religious leaders have power over nature?

In this world, religious leaders of a world religion practice a form of ritual magic that is essential to human existence. Certain rituals must be performed at certain times for nature to function ...