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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11 votes
7 answers
2k views

Building a Dyson sphere while preserving moons/other objects?

Humans want to build a Dyson sphere around the Sun. They have noticed that Ganymede's icy composition would be perfect for mining to get the icy resources needed to build the sphere, or Mercury could ...
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3 votes
8 answers
791 views

How would a species in a world where magic is banned also ban Science? [closed]

The people in my world who can't use magic are at war with the people who can use magic. Both groups used to be at peace before political and global conflict started, and long before they were at war ...
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3 votes
3 answers
149 views

How would the general public be kept unaware of a zombie outbreak? [closed]

Consider a zombie outbreak beginning in March 2020 rather than the Covid-19 pandemic we have today. This pandemic has started intentionally by a secret world organization to lower down the human ...
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  • 39
2 votes
1 answer
150 views

Would many parents use Designer Baby technology to make their children have Asperger Syndrome?

I have Asperger Syndrome and I was thinking if in a future which parents can use Genetic Engineering to choose the characteristics of their offspring many of them would choose their children to have ...
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8 votes
5 answers
543 views

What negative effects would stem from a world having many inland seas rather than large connected oceans?

My fantasy world Treyidal is a planet inhabited by two races, humans and merfolk. They live on a very seismically active world, with such things as micro-magic based earth quakes. For the moment we'll ...
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  • 2,441
-3 votes
1 answer
102 views

Adrenochrome artificial synthesis

Everyone has heard about Adrenochrome and its supposed ability to be youth serum. Usual story goes that pure Adrenochrome could be only obtained by child sacrifice, i.e. by torturing kids (younger ...
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  • 329
6 votes
1 answer
282 views

Is this asteroid realistic?

I would like to know if the following properties of this asteroid are realistic without conflicting with each other. situated in the inner part of the asteroid belt in the Solar System S-type ...
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  • 3,063
3 votes
1 answer
107 views

Darkness on a hycean world

Hycean worlds are planets twice as big as earth and covered in water oceans and with atmosphere full of hydrogen. A dark hycean world is one such world tidally locked to a star with one side forever ...
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  • 2,640
7 votes
3 answers
214 views

Could a group of large flying creatures cause a tornado?

In the world I am making their is a species of wyvern like monsters that hunt in groups of 10 to 20 in the aftermath of the storms they make and have wingspans that range from 20 ft to 36 ft. Other ...
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5 votes
1 answer
95 views

How do I know the weight of this shark?

In my game, I mean worldbuilding project... there's a thing called gravity, and gravity affects the weight of everything, and weight has to do with the damage one takes and deals to another, it also ...
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  • 374
1 vote
1 answer
71 views

How possible is my dwarf's biology?

One of the closest relatives of humans is unsurprisingly the dwarf, with a large disproportionate head and relatively short limbs. The dwarf weighs on average almost 150 pounds, with males being ...
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4 votes
1 answer
90 views

Draft 2: Are my tectonic plate formations plausible?

Ignore the biomes and stuff, I’m going to change that later. The world is spherical, and this is a map of the whole world. A quick note: Fennalore, the continent in the middle of the bottom row, is ...
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  • 227
3 votes
3 answers
185 views

Earthquake-prone civilisation — could floating cities be the answer?

This question is fairly self-explanatory. The civilisation in my story is in an earthquake-prone area due to lots of tectonic plates. Could using magic to make their cities levitate and thus not be ...
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  • 227
3 votes
2 answers
114 views

How do I make my young character getting shot and recovering realistic with the following narrative needs? [closed]

Ok so here is the scene. I have a twelve year old human girl taking part in the capture of a spacecrafts bridge (think of a location like Star Treks Enterprise). What happens during this scene is ...
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6 votes
4 answers
164 views

How un-dense could a super-duper-Earth be if that super-duper Earth was bigger than Neptune?

Long story short, I have an Earth-like planet, which is orbiting a mega-Earth (think a super-duper-sized version of a super-Earth), which is orbiting a K-type star, which is orbiting UY Scuti. I want ...
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  • 9,626
6 votes
1 answer
169 views

How is my biomes map?

For a while I've been making a realistic planet that is quite similar to Earth. I've finished the tectonic plates, ocean currents, wind patterns, and a rough height map. Next up is the biome map, ...
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  • 63
3 votes
1 answer
128 views

How likely these animals evolved on a sheer cliff? [closed]

In the world I am designing there is a giant sheer cliff which is so large if you were to jump from the top it would take around 5 minutes to reach the bottom. The cliff is mainly covered in a forest ...
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6 votes
4 answers
219 views

A substance that would cause a human to explode if eaten, but not your pet

I have a scene where a little girl has a pet. It could be a dog, cat, bird, monkey, whatever works for the scene, it just has to be something that humans keep as pets. She is feeding the pet with a ...
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  • 63.8k
4 votes
4 answers
221 views

Time Dilation and Melee Combat

Recently, I have been pondering the implications of a civilization being able to control gravity in shape they see fit. One of the more amusing uses of such a technology I've heard was that they ...
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  • 3,229
3 votes
3 answers
125 views

Can you carburize iron or tungsten using biomass?

I'm trying to devise a plot point where a great sorcerer (who's also a bit of a renaissance man, alchemist, inventor, politician, etc.) who slays a dragon and use its corpse to carburize iron ore ...
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27 votes
18 answers
5k views

What would cause full body armor to return?

Many times in sci fi, the concept of full body armor has come up again and again. Most famously in Star Wars where we see Stormtroopers wear white armor covering their entire body. What I'm ...
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  • 3,229
3 votes
1 answer
57 views

Given the parameters of this planetary system, what would the practical effects be on its surface?

I have a planetary system consisting of an oceanic world [7% Land] with a large precious metal moon [extremely dense with valuable alloys]. The planet has 110% earth mass, with a size of 1.4 Earth ...
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4 votes
1 answer
80 views

What are the implications of this given planetary situation?

My planetary set up is a single planet with 110% Earth density, and a planetary radius of 1.4 Earths. It is a continental world composed of 89% Liquid water oceans, stretching up to 13 km at the ...
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0 votes
2 answers
104 views

Can a desert and semi-desert be right beside each other geographically?

One of the countries in my novel is Semi-Arid, but I want it to become more like a hot and dry desert the farther West one travels (like the Sahara). Is this possible? PS. There are mountains to the ...
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3 votes
1 answer
91 views

Can trolls create chimeras with their renegeration ability?

TL:DR = trolls exist, troll cells are universal stem cells on steroids, specifically bred trolls are more powerfull and used to fuse different animals together with their regenerative properties. In ...
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  • 374
6 votes
4 answers
153 views

What can you know about a creature just by looking at their appearance?

To give an example, I have this species of elk minotaur, they are mostly human looking but have a elk/deer head, ankles and hooves. (image source Raid Shadow Legend concept art + my low poly model) ...
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  • 374
12 votes
12 answers
2k views

A mathematical problem that no computer can solve, but a human can

I am aware this is in the gray area of “story question or world question” but I think it is at least mainly world based. So in this reality set in the far future, somehow a certain math problem has ...
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  • 2,103
4 votes
5 answers
1k views

Would crossbreeding between humans and trolls always be taboo?

In the world in question, we have anatomically and psychologically normal humans living in a variety of societies. We also have trolls. Trolls are a hominid species more closely related to humans ...
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  • 45.4k
17 votes
9 answers
2k views

Seeing oneself in an abstract painting

It is known that people, when looking at some complex patterns have the tendency to find human faces in them. My character goes to a museum exhibition of abstract art. She finds herself in front of an ...
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1 vote
3 answers
153 views

How protective is this monomolecular wire ‘force field’?

During my worldbuilding process I said to myself “no force fields”. Instead, I’m forced to get a little more creative and down to earth with my (ironically) sci-fi concepts. Enter the monomolecular ...
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  • 8,617
5 votes
2 answers
285 views

Nail to Claw: Evolutionary pressures for hominids to develop claws

In my question about carnivorous elves, one of the commentors pointed something about my elves that I had not really considered in depth before hand. My elves are a form of hominid, thus an ape. My ...
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  • 3,229
2 votes
3 answers
366 views

How big can my centaurs be due the square cube law?

Okay, so in my story I plan on having centaurs that evolved from hyracotherium (otherwise known as the “dawn horse”). They started off with a mutation that gave them a second pair of limbs which while ...
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0 votes
2 answers
107 views

Using nanoparticles to give people blood clots for fun and profit

Some background: this question concerns iron oxide nanoparticles. Iron oxide nanoparticles are approximately 1 to 100 nanometers in diameter, as opposed to, say, a red blood cell, which is 10,000 ...
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  • 9,626
4 votes
4 answers
230 views

Durability of analog vs. electronic robots?

The setting is just like earth. If we could build a fully functioning humanoid robot out of either a fictional analog material, or an electronic/digital processor and material, which would be more ...
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4 votes
2 answers
180 views

Mountain ranges and tectonic plates -- how can I make my world map more plausible?

This is the first world map I’ve ever made. I tried a smaller one a while ago, but now I’m attempting a map of a full planet. As always, this world is Earth-like, etc. I also have yet to finish it, ...
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  • 227
5 votes
2 answers
622 views

Methane-Breathing Animal?

In my story, Saturn’s moon Titan’s methane lakes are inhabited by microorganisms that photosynthesize, converting hydrogen into methane (A process thought possible on Titan after some study). This ...
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3 votes
1 answer
171 views

Human Eye in a Vacuum

In my short story, an astronaut is in Earth orbit doing a spacewalk in your standard variety spacesuit and is just about to enter airlock back into the ship. However, just as the airlock door finished ...
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  • 33
2 votes
2 answers
797 views

Is there a substance that gets stronger when damaged?

I have "ossification" stat in my game but i don't think the name doesn't fit the context. Armors can have this stat; basically the armor becomes stronger when damaged, the effect works 5 ...
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  • 117
6 votes
2 answers
127 views

A creature that turns all water near it into slime

I have an idea for a creature, and I want to figure out if it's possible. I'd rather not handwave it with "magic", so, here I am, asking the Stack. The creature is eel-like, and is capable ...
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2 votes
3 answers
190 views

Could the electrical charge of a black hole neutralize it's gravitational pull?

It's well-known that gravity is the weakest of the 4 fundamental forces. With this knowledge, would it be possible to cancel out the gravitational forces of a black hole with it's charge? Say a black ...
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  • 1,451
0 votes
1 answer
110 views

Will nature after millennia create a temperate rain-forest in my structure?

I am making a weird space that can not exist in the real world. It is made up of bubbles made from an indestructible material. The material is smooth as steel plate on the inside. One can go from one ...
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  • 1,201
3 votes
2 answers
155 views

Can you paralyze a skeleton?

I have skeleton enemy in my game and a paralyze(stun) stat. Can you paralyze an un-living creature? According to my research, paralysis is related to the nervous system, so a skeleton shouldn't have a ...
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  • 117
6 votes
2 answers
250 views

Eyelids with compound eyes?

I have a large insectoid creature with compound eyes in my story. The creature’s habitat is prone to sudden dust storms; as a result, I was planning to have it evolve a set of eyelids so it could ...
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  • 1,342
7 votes
6 answers
433 views

If a time traveler from the near future went back in time to kill Hitler and failed, could the nazis reverse engineer modern tech with 1940's tech?

Suppose someone went back in time to kill Hitler and fails and some modern tech falls into nazi hands. What modern technology could they realistically reverse engineer with 1940's tech? I'm leaving ...
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3 votes
3 answers
164 views

Can a new geological material (specifically, a metal) be formed no older than 56 million years ago?

There is an alternate Earth that I've been building and rebuilding for years. The canonized point of departure is 56 million years ago, specifically a Paleocene-Eocene Thermal Maximum that is four to ...
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  • 14.4k
4 votes
1 answer
122 views

Realistic limits of a ''Growth Spurt''

A character of mine (a girl in case that detail matters a lot) is at the brink of entering (or already int he early stages of) puberty. And apart from (due to story related circumstances) growing up ...
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  • 1,441
3 votes
2 answers
178 views

How wide can you make an orbital ring?

How wide can you make an orbital ring? This question is simple. The orbital ring is a concept in which a ring encircles the earth (or other celestial body) and revolves around it so that the ...
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  • 8,617
1 vote
2 answers
225 views

Genetic Plausibility of All-Male Half Giants and All-Female Witches

So, this problem is kind of a two-in-one; arguably two different issues but very closely related, so I'm posting them as one question. I'm designing a lineup of fantasy races for a roleplaying setting,...
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5 votes
3 answers
223 views

A chemical process that creates sapphire bones

To quote Logan R. Kearsley's answer to this question regarding stronger-than-normal bones for making big but proportionate humanoids: And if you wanna go a little further out there... Sapphire ...
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  • 9,626
10 votes
10 answers
5k views

Could extremely tall towers be held up by balloons so that they don't collapse under their own weight?

"Tower" may be a misleading word choice for what I have in mind. My approach to building vertical structures is a bit different, more on that later. There are two main issues that plague ...
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  • 8,617