Questions tagged [reality-check]

Asks if a given concept is realistic in a given context. Answers should say yes or no, with supporting info. Compare this with the science-based and hard-science tags. This tag should never be the only tag on a question, because this tag frames how a question should be answered, not the topic.

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2answers
44 views

Telepathic octopi influencing other species

Let's imagine humans are somehow controlled by a smart telepathic species that make themselves invisible to them, say everyone has an octopi on their head and are unaware of it. Every time the ...
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2answers
39 views

What Environmental Factors Would Lead To The Evolution Of A Large, Warrior Homonid Race?

I'm working on a story that involve numerous types of species being pitted against one another, each one similar to humans but differing due to an evolutionary "theme". These "themed&...
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2answers
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How realistic is my idea of dividing the brain into several separate models?

Recently, I decided to work on scientifically plausible superhumans that would have to be quite different from ordinary people from an anatomical point of view and be many times smarter than us. So ...
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1answer
97 views

How viable is my model of gapless neurons?

Recently, I have been writing about anatomically plausible superhumans ( a more advanced, stronger, and smarter human species that was artificially created and planted on a terraformed planet similar ...
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1answer
73 views

A war for what’s left of space [duplicate]

My story is a space adventure, opera, war with an advanced alien race going to war with each other using this magic system the warring factions are the remnants of a Kardashev type 3. The biggest ...
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1answer
50 views

Would this setting be realistic or feasible for this race?

I have a concept for a race that I'm very confident is sound in general, but I'm wondering if they would do well in the setting I currently have in mind. The race has a lizard-like appearance, largely ...
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2answers
69 views

Domestic uses for a solar death ray

What: I've been toying with the Dyson-swarm concept for a while, and specifically a tale about how it might be built. Let's say that it's Australia who build it, being a reasonably developed group ...
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16answers
6k views

Realistic way to damage bullet proof glass using common substances

Ok so here's the scenario. I've got a hero fighting a stompy robot that is covered in armour that stops the hero's electricity based attacks. However it still needs to see and thus has a camera that ...
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2answers
124 views

Is This Living Planet Plausible?

My idea is an planet that is one living organism wrapped all around an rocky foundation. It orbits an sun of one solar mass, and has an Earthlike radius. Its albedo is about 20%, so it gets 1098.4 W/m^...
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1answer
87 views

universal politics of alien warfare [closed]

My story is a space adventure, opera, war with an advanced alien race going to war with each other using this magic system plus FTL, iron stars, Dyson spheres but as I was world-building I realized I ...
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1answer
57 views

Evolution of ossicones like structures to tentacle or trunk like limbs

A time ago I made a similar question which is this and some time after other similar which is this. So I can consider this new question an improvement or continuation of what I wanted to achieve with ...
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3answers
110 views

Scenario for creating a world akin to cyberpunk

I was wondering if the debt of major developed countries (especially the USA) were to grow too high (possibly with interest rates above GDP as this is the current view of what it takes to go backrupt) ...
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3answers
79 views

How would the reflection of sunlight change the day / night cycle of a binary planet system?

I am thinking of setting a story in a binary planet system, but am unsure what mechanics would be at play in regards to the reflection of light off of one planet and the day/night cycle. In this story,...
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0answers
94 views

The Art of war in the vastness of space [closed]

My story is a space adventure, opera, war with an advanced alien race going to war with each other using this magic system plus FTL, iron stars, Dyson spheres but as I was worldbuilding I realized I ...
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9answers
1k views

What kind of catastrophic phenomena could cause a solar system to be wiped out with little to no warning?

It's a pretty simple question: imagine you have a solar system about the same size as our current one. This solar system is close enough to nearby colonies that most observatories can see the planets ...
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2answers
99 views

Realistic Healing Magic [closed]

Probably the toughest challenge in having my fantasy world depicted as realistically as possible is to define how healing works. So far I managed to establish several key rules, but I can't help but ...
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3answers
54 views

Is the following plausible: a moon at an L1 point orbits a gas giant, which orbits a sun. the moon is submerged in half daylight half moonlight

I'm writing a sci-fi & fantasy novel, I won't get into details, but in essence it's set on a fantasy moon that orbits a gas giant, which orbits a sun. The moon is at an L1 (Lagrange 1) point, and ...
3
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2answers
851 views

Bill Gates Is Thinking About Dimming the Sun - What's the worst that could happen? Real-life WorldBuilding

Bill Gates Is Thinking About Dimming the Sun The billionaire is backing a study of the controversial technology called solar geoengineering. Let us suppose that the research shows that cooling the ...
3
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3answers
175 views

How fast could we build a Dyson Swarm?

I'm in a rush to colonize the Solar System. Thankfully, the latest Space Race, a commercial one between SpaceX, Blue Origin, Rocket Lab and other less known market entrants, is set to dramatically ...
2
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2answers
148 views

Is it plausible for a planet to have a face constantly sunlit while the other is constantly moonlit, with the sun/moonlit territories never changing?

I'm writing a sci-fi & fantasy novel, I won't get into details, but in essence it's set on a fantasy planet that orbits around a sun, and has a moon. The basic premise (that I'm hoping for anyway) ...
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4answers
167 views

How reasonable is my “Chimera Virus”

I have in my series a group called "Chimeras". They were once normal humans but were exposed to an artificial gene-editing retrovirus known as the "chimera virus". The chimera ...
3
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2answers
269 views

How can I mass produce steel without coal?

So, Suppose for a moment that there is a society on the verge of an industrial revolution. They live on a super-continent. The continent has a circumference of around 40,000 kilometers (If I recall ...
2
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2answers
173 views

How feasible would humans beings wiped out by plant aliens be?

In my world, the population of mankind has been all but wiped out by the accidental introduction of extraterrestrial plants brought to earth by scientists who were attacked by them. The plants ...
4
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4answers
369 views

Cryo-Pods For Unaltered Humans

OK, faster than light isn't possible & a merely significant fraction of it can begin to stretch the bounds of reasonable reality as that fraction increases // so a less unreal way to allow us our ...
3
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5answers
104 views

Could a planet form from the remnants of a star and its solar system?

This is just a simple question, and I haven't thought all that well on it, but I think in terms of sci-fi and fantasy less tied to probable scenarios this could be quite possible. Imagine a free-...
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6answers
434 views

How would this astronaut-in-training know she was in a pool on the Moon and not on the Earth?

Many are familiar with the scenes of astronauts-in-training practicing weightless activities while submerged in a pool with neutral buoyancy. In this scenario, an astronaut is in such a pool, ...
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3answers
301 views

Could there be a star where humans could survive for a short time?

This honestly sounds like it's basically impossible, but here we go anyway. We've picked up a strange reading from a spot orbiting a star in a system elsewhere in the Milky Way galaxy. We've come into ...
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2answers
111 views

Plausibility of my alien race [closed]

I came up with an alien race for a video game I'm developing, and I wanted to know if they would be scientifically plausible. They call themselves (rough translation) the Valke. They are humanoids ...
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4answers
2k views

What would happen if a rogue planet (3x times bigger than Earth) entered Earth's orbit?

I'm writing a novel about an extraterrestrial civilization using it's planet as an interstellar ship, let's assume they somehow figured out how to do so (sci-fi magic) and they were aiming to find ...
4
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3answers
215 views

Black Hole Weapons - Laser/Particle Beam?

First post here, but longtime lurker :3 My question is this: if you have a civilization that is using black holes as a battery/pseudo power source, and they want to weaponize it -without- shooting the ...
2
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1answer
93 views

Could a photon with negative, dark, or anti energy be used to create a freeze ray?

I'm not really a science whiz, but I know lasers generally use photons to increase the kinetic energy of atoms in their path, thus raising the temperature. Now I know electrons have negative energy, ...
3
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4answers
216 views

What worldbuilding conditions would need to exist to allow a terrorist organization to inadvertently destroy their entire civilization? [closed]

Here is the question that most contains the scenario for this new one because it’s a continuation so I would recommend reading the scenario in that question. Note: this is about the Venus society ...
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11answers
2k views

What will it take to get 1,000,000 people living in space habitats?

Sure, land is expensive here in downtown Metropolis, but lots of cheap land to build on even a few dozen miles out, never mind in the backwoods, or in flyover agricultural lands that rich, self-...
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0answers
79 views

Features of a tricorder from 2060 [closed]

The tricorder (in the generic, non-trademarked sense) is a vital companion for any colonist to the outer Solar System. But what does it detect, and how? Passive imaging. Using superlens/hyperlens/...
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2answers
194 views

Is this sci-fi weapon of mine realistic?

M36 Rifle Operation: Select-fire, gas-operated, magazine-feed, ETC Mass: 2.9kgs (unloaded) 3.5kgs (loaded) Barrel Length: 50.8cm Cartridge: 6.8x31mm caseless RoF: 500rpm (3r) 1800rpm (full-auto) ...
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8answers
5k views

Can a super computer be built using time dilation?

If I have a very computationally expensive task that no current computer can solve in less than 100 years, I could start the task on a powerful computer, get on board my Super Hyper Extravaganza Space ...
5
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3answers
156 views

Would a human survive being shot out of a trebuchet? (Not the landing) [closed]

For reasons, groups of humans are bound together, placed in a barrels or such, which are then loaded onto trebuchets instead of their usual projectiles. Would these humans survive being launched? Note ...
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3answers
696 views

What could be the largest geosynchronous moon?

If we consider a planet with the same characteristics as the earth, (diameter, mass, rotation period) what would be the maximum possible diameter of a moon on a geosynchronous orbit? Considering the ...
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1answer
100 views

Can cold thrusters be improved for work in space

This belter got Mr.X thinking and it is a stroke of genius this time. What do we do with all that oxygen we get when extracting metals from their oxides? we liquify and use them as a reactive mass of ...
5
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4answers
1k views

Alternate chemical elements?

I'm running into some issues trying to make sense of both my planet's density (it's given properties should make the planet an ocean world, so I'm looking for lighter elements so the planet is rocky) ...
2
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5answers
480 views

What percentage of NPCs does a god need in order to remain benevolent?

A god (G) of an Earth-like world is benevolent. At the same time G allows free will. The problem is of course that some people will choose to harm others. This presents the god with a problem; how ...
3
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1answer
53 views

Conditions for intelligent and diverse life at high altitudes

I'm making a planet which hosts three distinct layers of floating islands, each higher than the last one. The islands should be reasonably thick, ranging from a couple hundred metres to three or four ...
0
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1answer
77 views

What's the best climate for the extremes of a supercontinent that doesn't exceed latitude 55 and don't have ice caps?

The world is not to be so much different from Earth, unless it has 1.5x Earth's mass, the average temperature is 17°C and the axial tilt is 20,5°. Comparing to Earth in this latitude, it should be Cfb/...
2
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2answers
115 views

Copper Armor as defence against laser weaponry?

As I'm sure many of you educated folks on this stack exchange know, copper is one of the most heat-conductive common metals out there. My question: if, for some reason a society with early 20th ...
3
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2answers
196 views

How feasible would a Gaza - Gulf of Akaba canal be, purely technically speaking?

Note: partially inspired by the recent ship that ran aground in the Suez canal. In my alternate history novel, I'd like there to be a second Red Sea-Mediterranean Sea canal roughly along what's in our ...
35
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7answers
4k views

Delivering the Eternal Sausage

In a future world, well-to-do people have access to piped food that travels straight to their kitchens. Let us focus on one such food; the eternal sausage. My first idea was to simply force sausage ...
14
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7answers
3k views

Reasons for a very small but very high mountain range in an area with no plate boundaries?

One of the cities in my world, known as Kerkapeze, is situated in a location I just realized I'd have to be very creative to justify: it lies on a narrow plateau between two high but very small ...
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2answers
155 views

Plausibility of a magic system

A while back, I came up with a magic system designed for a scientifically-oriented book, but am not sure if its actually scientifically possible/explainable. It goes like this: Magic is a product of ...
0
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2answers
82 views

How would telepathy among kinsmen effect preindustrial societies? [closed]

So if people from the same family can communicate telepathically over long distances, how would that effect postindustrial societies? Ie rome, medieval times or even early modern times The way it ...
3
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3answers
675 views

How much damage would a fractured moon would do to a world

Ok, here is some setup. This fictional world which I have yet to name — let's just call it Earth to make it easier — has two moons, with one bigger than the other. There was then a cataclysmic event ...

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