All Questions

0
votes
1answer
116 views

Is using light as a reactive mass in a rocket engine possible? [closed]

How practical would be a rocket that would use laser light as a reactive mass, given there is a very efficient electric energy source or storage?
-5
votes
1answer
243 views

Rowing dragon, could it work? [closed]

Basically, -in lieu of giant pterosaur torso fossils - we have to assume this was true for the giants, too. The 544 mm long humerus of Q. northropi translates to a predicted torso length of just c. ...
1
vote
1answer
132 views

Adverse Effects of Widespread Immortality [closed]

In a medieval high fantasy world where magic exists, if there is a geographic area in which living creatures mature and then stop ageing; what would the negative effects of this be; firstly on a small ...
11
votes
3answers
797 views

Gastric acid as a weapon

The dragons in my fantasy world spit fluid from their mouths when threatened, which upon contact causes a burning sensation. I could have this liquid be standard venom, like modified saliva, but I ...
7
votes
3answers
222 views

Scientifically Correct Hanahaki Disease?

For those who don't know, Hanahaki Disease is a fictional disease related to love. It can happen when someone has unrequited romantic feelings for someone, so flowers start growing inside them. The ...
5
votes
8answers
217 views

Ambush tactics for dummy witches?

Magic in this world focuses on controlling the elements of nature (earth, air, fire, water). Witches perform magic by drawing in energy from the natural world and focusing it into a spell using their ...
25
votes
19answers
6k views

The logistics of corpse disposal

A pair of fearless killers, thousands of years old, guard a path to what is believed to be heaven. Of course, all towns in the area have different ritual and traditions where either their criminals or ...
37
votes
22answers
9k views

What would be the ideal power source for a cybernetic eye?

After nearly a decade of development and public prototypes, the Mizaru company is ready to unveil the cybereye. A fully cybernetic eye that provides its user/host with high definition vision, enhanced ...
13
votes
3answers
1k views

Black holes as heat sinks

Cooling in space is a well known difficulty. There are many unpleasant consequences like no stealth in space, difficult space battles which turn into a short wars of attrition (because you have to ...
5
votes
2answers
175 views

Atmosphere of a terraformed 10 km planetoid with Earth gravity

Bernal spheres and other O'Neill cylinders are complicated, maintenance-high and fragile beasts. Someone started to make micro-black-holes and put them in asteroids, in order to have 1 to 10+km rock ...
3
votes
3answers
184 views

Medieval/ancient/fantasy setting in southern hemisphere?

I was unfortunate enough to imagine an ancient setting upside down. I started out with small features and, after connecting them, got the following: ...
1
vote
0answers
53 views

How would I build a civilisation of multiple worlds around multiple suns work? [closed]

I’m building a group of magical civilisations, in which there are seven suns, orbiting a much larger sun, each with their own planets. There are forty planets in total. Some are moons orbiting gas ...
-4
votes
2answers
105 views

Chemically induced fear [closed]

Secret police in my world want to interrogate subjects but they're very resistant to all techniques.So they want to induce fear in subjects.How they could achive this?
6
votes
1answer
1k views

Can rocky hills similar to the Scottish highlands be located next to a bog?

I've written about these rocky hills with short grass, gravel, shrubs, and big boulders. At the bottom of one of the hills is a big bog. Basically I've designed some buildings to be sticking out of ...
45
votes
11answers
8k views

How do I keep my slimes from escaping their pens?

Hmm... Time to take inventory of the slimes real quick... Lamp Oil Slime, O- Slime, Yellow Paint Slime, Pur-... Red Paint Slime? Blue Paint Slime? You two didn't...! Great... So I need a new RPS and a ...
33
votes
9answers
5k views

Antler Helmet: Can it work?

Lord Woodesy wants to have a glorious antlered helm! But he has heard that having antlers, horns, or other projections on a helmet can be severely detrimental in conflict since they can be grabbed or ...
3
votes
7answers
662 views

What items from the Roman-age tech-level could be used to deter all creatures from entering a small area?

Please assume the following: There is a item on the ground and I want nothing but bare earth touching it. I cannot move the item myself. The item is impervious to fire. I cannot afford to guard ...
7
votes
8answers
2k views

Need a suitable toxic chemical for a murder plot in my novel

I need ideas for a chemical or disease which kills the victim upon holding it in the palm for about 4 or 5 seconds. The death isn't necessarily immediate, as it might take days to kill the victim in ...
3
votes
4answers
152 views

What would a bioengineered human-predator look like? [closed]

Read (and watched) 'After Earth', where humanity has fled a dying Earth to colonise a new world. Unfortunately, for whatever reason, some intelligent aliens decide to periodically send waves of ...
10
votes
11answers
2k views

How to market an anarchic city as a tourism spot to people living in civilized areas?

So, in my Post-Apocalyptic world, there’s a city down in South Nevada known as Vegas. Unlike the rest of the majority of North America, Vegas was not hit by nuclear warheads in its near vicinity. But, ...
3
votes
9answers
277 views

How do I give my alien mercenaries a fighting chance?

So, Earth has run afoul of an alien power. The aliens have a working FTL drive, but no one else (including us) does. They have used their technological superiority to create a far flung mercantile ...
0
votes
1answer
192 views

Do abandoned sewers and underground tunnels really exist like portrayed in movies? [closed]

In movies there are man-size tunnels where criminals or main characters are hiding or living. Do such tunnels exist in real life and, if so, why are they not controlled. Why is there still power on?
13
votes
2answers
446 views

How could chocolate be as addictive as heroin?

Most of us are well aware that chocolate is already a bit addictive to human beings... maybe it's the caffeine or the sugar? But what if there were a species to which chocolate was as addictive as ...
2
votes
2answers
88 views

How might a superintelligent spider species that trap humans and incorporate their minds into their hive come about? [closed]

In the Netflix short film "Beyond the Aquila rift" (spoiler ahead), we see a spaceship and her crew trapped in a spiders web. The spider plays mind games with them, feeding them simulations involving ...
5
votes
3answers
116 views

How could somersaulting worms evolve?

In Wayne Douglas Barlowe's classic book "Expedition" he has many strange creatures. One that intrigues the most is this one, the flipstick. It has two feet on either side and uses them to flip ...
2
votes
2answers
112 views

What phenomenon (gravitational?) in space would allow the transfer of humans rapidly between two planets or system-wide?

So what I'm looking for is some plausible idea of two human planets, orbiting each other closely, that despite having regressed to a medieval homage, were capable in this old era of powering solar ...
3
votes
2answers
100 views

How to cultivate war? [closed]

Hard to say if wars (fictive or real) ever had any rules. And if there were some rules, then there were also attempts to break them, or at least to avoid them to take any advantage. So, it may seem ...
4
votes
1answer
110 views

Can a possible humanoid species capable of changing their sex in a crisis be the dominant species of an entire planet like us?

I had an idea of a concept a while ago. If a planet that for some reason or another had only one giant continent like Pangea, but bigger, for more distinct habitats and giant lakes assuring ...
5
votes
1answer
133 views

Is it possible to create rage virus from 28 Days Later?

In 28 Days Later the Rage Virus causes uncontrollable aggression and changes in personality. Is such virus even possible in principle? I'm not talking about rabies but rather about a genetically ...
10
votes
3answers
191 views

What thickness of atmosphere and strength of magnetosphere would I need for a planet to have a deadly daytime and a hospitable nighttime?

What thickness of atmosphere, and strength of magnetosphere, would I need for a planet to have a deadly daytime and a hospitable nighttime? I'm wanting a planet in which humans can survive on as long ...
8
votes
6answers
426 views

Would it be possible to rearrange a dragon's flight muscle to somewhat circumvent the square-cube law?

The square-cube law holds true only for objects that are similar. In evolution, you can't make big leaps forward, but since most fantasy worlds are created by gods or people who think they're gods, I'...
12
votes
9answers
2k views

How can I protect witches in combat who wear limited clothing?

On TV, witches often wear skimpy, impractical outfits when going into a fight. This is done for fanservice reasons, so I wanted a way to make this sensible. Witches perform magic by drawing in energy ...
7
votes
2answers
208 views

Stellaser Part I: Trial by stellar Fire or The best design out of three for a solar powered 5 Petawatt laser?

I´m building a hard-sifi setting and want to use Stellasers (abbreviation for stellar laser) to provide thrust and power to interstellar vessels. This part one is only concerned with the construction ...
7
votes
4answers
220 views

Aliens in a 4D universe try to explore our 3D spacetime fabric: How can they do it?

They do not necessarily meet humans and try to interact with them. This question is more about the technical possibility/impossibility of 4D aliens being able to "analyze" the inner structure of our ...
0
votes
3answers
116 views

How would two fireballs act when they collide? [duplicate]

A magical fireball is just a large mass of high energy, or rather a chaotic state if excited particles. Normal flames require a fuel that will have kinetic energy when flying in a direction, resulting ...
14
votes
4answers
357 views

Navigating storm fronts in space

Storm fronts — especially surprise storm fronts — are a popular Sci-Fi trope. Ion storms and radiation storms and neutronic storms and they invariably look 2D, like ribbons in space. But ...
11
votes
8answers
1k views

Could an empire control the whole planet with today's comunication methods?

I remember watching a documentary some time ago and at one point they were talking about how empires were limited to a certain size since there was no way to communicate across the empire quickly and ...
17
votes
14answers
2k views

Would an alien lifeform be able to achieve space travel if lacking in vision?

Think of this alien life form as something resembling earth bats, placed in a planet with Earth-like conditions. Micro-bats have small and poorly developed eyes. Similarly, this alien species is ...
10
votes
18answers
3k views

What aspect of planet Earth must be changed to prevent the industrial revolution?

I am thinking of a planet (I suppose one would call it a parallel earth) where the industrial revolution never happens, and people live with 1700s technology forever. What differences in resources/...
3
votes
3answers
106 views

How can combining two ethereal substances that naturally repel amplify each others effects?

Angels and demons come from the ethereal realm, a plane of pure energy. The former is made up of pure ether while the latter is made up of a corrupted version. These forces naturally repel each other, ...
3
votes
2answers
116 views

Flywheels for high altitude airship control

Airships in RL are not very great in combat for various reasons. However in my setting there is Unobtanium that is repelled by gravity, instead of being attracted. A lump of Unobtanium can be used ...
8
votes
2answers
144 views

Ball lightning projection as an alternative to plasma weaponry

Plasma weaponry is a staple of science fiction, but is often objected to on the basis that it expands too readily. There's no way to effectively deliver it to a target without spending a lot of effort ...
10
votes
5answers
2k views

Likelihood that a superbug or lethal virus could come from a landfill

Landfills seem like disgusting, nasty places that could be breeding grounds for all sorts of viruses and bacteria. What is the likelihood that the next lethal superbug or virus (like Ebola) could ...
1
vote
1answer
96 views

Differences between users of magic depending on their denomination [closed]

As anyone that knows a bit about magic in fantasy worlds can tell you, there are many names for magic users, such as wizard and mage. So what makes a wizard different from a mage? My idea, although ...
14
votes
6answers
343 views

Flight paths in orbit around Ceres?

In my sci-fi world, mankind has begun colonization of the large asteroid Ceres. It's a mining hub, with a lot of cargo vessels transporting things in and out. Hydrogen peroxide fuel is cheap and ...
2
votes
4answers
146 views

Would running a state health care/medical system with a military style hierarchy be effective? [closed]

The Hegemony has built itself on turning inefficient systems of the "old countries" into efficient ones. One of these systems would be health care and the medical industry. The Hegemon decided to ...
3
votes
2answers
169 views

Making iron tools from blood [closed]

So, I read a while ago several threads about making iron objects/blades from blood. In my conworld there are giant predators that would, according to my calculations, have enough blood so that 12 of ...
3
votes
1answer
199 views

Can you forge iron from oxide dust?

I've been looking over the internet and on here to find some kind of evidence for this, but nothing conclusive, so I was hoping for people with a better understanding of smelting, chemistry and ...
2
votes
0answers
43 views

Could a rogue planet support life? [duplicate]

I was wondering whether a free floating planet could potentially host life. If so, how? I was thinking of a geothermically active planet, where the only source of heat comes within the planet itself. ...
23
votes
11answers
4k views

How can I define good in a religion that claims no moral authority?

Faith is defined as a belief in God based on spiritual apprehension rather than proof. Religion and science can be seen to oppose one another due to conflicts between people of those practices. In my ...

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