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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.

0
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1answer
22 views

What Else Could Create Jeffrey Linn's Coastlines BESIDES The Influence of Ice?

Who? Unfortunately, I could not find any background information about Jeffrey Linn, but he is better known for his sea level maps. Specifically, what a particular city would look like if sea levels ...
2
votes
1answer
65 views

Splitting the atom with a hammer

In a world of superheroes the job of blacksmith is given to the very strongest of them. Question Is splitting an atom in a human-scale piece of work by using a human-scale tool even theoretically ...
5
votes
3answers
318 views

Slaves who have slaves who have slaves

NOTE It has been suggested that I change the word 'slave' to something else, perhaps 'servant'? My intention is to describe a person who is required to work for someone else with no pay. ...
28
votes
10answers
6k views

How can a kingdom keep the secret of a missing monarch from the public?

The eleven year old son of the king and queen, prince Jeoffrey Boratheon, is destined to take the french iron throne after his father passes. One night, an old hag knocks on the castle door and begs ...
18
votes
28answers
9k views

How can guns be countered by melee combat without raw-ability or exceptional explanations?

I'm writing a science fantasy setting for a tabletop game. Its major influences are Dune, Final Fantasy 7, and Borderlands. My goal is to give a universal account why swords, spears, etc., equal or ...
35
votes
15answers
9k views

Colonizing the galaxy by slow boating reality check

Humans like to explore and seem to have an almost instinctual need to expand. After spreading throughout the solar system and even into the Oort Cloud they decided that humanity should follow the ...
7
votes
5answers
163 views

Boiling sea between volcanoes

In my world, there is a chain of offshore volcanoes which are the result of a smaller plate hitting a larger one. There are two to three active volcanoes. My question is: two of these volcanoes are ...
0
votes
3answers
90 views

Modelling platinum supply

Given an asteroid mining company manages to deliver platinum (ore) to Earth, how would they need to set their selling price to account for delivery, given that today on Earth 1g platinum costs $30 to ...
7
votes
2answers
320 views
+500

Could Gymnosperms Develop Fruits and Flowers Like Angiosperms?

Here is the scenario: A Paleo/Mesozoic mass extinction wiped out 96% of all terrestrial species, and the only plants that survived were as follows: One genus of conifer One genus of cycad One genus ...
1
vote
3answers
270 views

Controlling personal gravity – how would it affect a warrior's combat style?

So I have a character in a fantasy setting who is basically a human for the most part in terms of physical limits. They do have slightly stronger bone structure and greater endurance, along with ...
2
votes
2answers
76 views

High-Altitude Asteroid Impact

66 million years ago, the dinosaur empire was in its death throes when its final nail in the coffin came hurtling down from the sky. A clump of rock the size of Mount Everest smashed into the Gulf of ...
6
votes
0answers
54 views

Feasibility of an Antimatter-Catalysed Ram Augmented Interstellar Rocket (AC-RAIR)

A fictional starship that I am designing functions via a form of Bussard ramjet that uses hydrogen from the interstellar medium as reaction mass, not as fuel. In order to accelerate the propellant, ...
2
votes
1answer
105 views

Is this humanoid dragon realistic the way I’ve imagined it?

In this world I’m dabbling with, the dominant species is a race of six limbed humanoid with two wings on its back slightly below the shoulder blades. They are very slender (“BMI” is between 17 & ...
6
votes
4answers
143 views

Water planet turns into desert world without being rendered uninhabitable

A habitable (human could survive in its atmosphere without suits) desert planet which used to have large oceans is quite common in ScFi. I was thinking about the processes which could have been ...
6
votes
2answers
159 views

Can enough CO2 be captured, in order to reduce global warming, to reduce oxygen levels to suffocating levels?

In a comment to a recent question, it was pointed out that Biosphere II failed in part because too much CO2 was absorbed by the concrete, leaving insufficient oxygen in available CO2 to be released by ...
10
votes
2answers
278 views

Bouncing Beads of Blood - Just how cold would it have to be?

My heroine has been stabbed - run through the abdomen by a foot-long dagger - and is bleeding to death. She is currently crawling toward her salvation through a very cold place. She is magically ...
11
votes
4answers
806 views

Mermaid Land (and Sea?) Combat

I might have a bit too much saltwater in my brain. I'd like to discuss (can you do that in this format?) the ideas of combative mermaids on land. If you say my other questions, you say my bring up ...
169
votes
19answers
29k views
+50

Russian Dolls - How do they reproduce?

Warning picture showing dissected Russian Doll My theory I believe that Russian Dolls reproduce asexually. They are born pregnant. At the time of birth, the outer doll dies. What is now the outer ...
1
vote
1answer
41 views

Crater sized bore hole on Ceres, how would you make it economically profitable? [on hold]

Ceres is a bustling port within the belt and a commercial, entertainment, and economic hub dealing with the markets of both the inner and outer planets. Ceres is home to the largest colonies in all of ...
4
votes
1answer
66 views

Can Aspen forests have other species of tree present?

In a world dominated by steppe, the warmest regions give way into parklands dominated by stands of Aspen. My research suggests that Aspen groves may tend to exclude other species of tree, but I am ...
17
votes
10answers
899 views

Fixed-Wing Birds?

How plausible are naturally-evolved, biological, fixed-wing flying creatures? Could such a creature plausibly evolve in Earth-like conditions? If so, what method would it be most likely to use for ...
7
votes
2answers
189 views

Brain Tick, how could it take over a host's brain?

There was once 12 kingdoms in the ancient days until the kingdom of Eo was devoured by the very forests it called home. The people of Eo have been turned into beasts wandering the woods and preying ...
8
votes
6answers
287 views

Liquor making with Time related magic in an ancient-medieval world

So you can accelerate or reverse time of an inanimate/non sentient object within a limited space. Despite having such powers, you don't want to rule the world. Instead you want to make alcoholic ...
0
votes
5answers
103 views

How Can the Coastlines Look Similar In Spite of the Cooler Temperature

The established fact is that the shape of a planet's continental coastlines is determined by the planet's climate. Higher temperatures mean less ice, which ultimately means higher sea levels. (Case ...
3
votes
4answers
1k views

Horses went extinct, people domesticated something else. - What is it and what would change?

Assuming that horses went extinct early in history, what would replace the horse, and how would the change in domesticated animal affect the development of the first civilizations? Info on horse ...
5
votes
3answers
155 views

Reality check; minimal axial tilt = minimal seasons/mild weather right?

TLDR; what would weather be like with minimal axial tilt? Included is a picture of my climate map and several perspectives of a paper model I made of the planet. The ocean covers over half the planet,...
0
votes
2answers
88 views

Plausible reason why the bunker dwellers would stay in their bunker for 90+ years? [on hold]

Unknown to the majority of the Wasteland, a secret behemoth of terror slept beneath the ground, only to awake with plans to reshape the Wastes in their image. Before the Great War of 1962, a large ...
10
votes
4answers
1k views

Could domesticated mammoths sustain a group of nomads

In a fantasy world I have planned, I wanted one of the nomadic groups to live on a frozen steppe. They would primarily subsist by herding and domesticating mammoths. Would mammoths be comparable to, ...
4
votes
2answers
117 views

Could fruit (specifically oranges) evolve into intelligent life? [on hold]

Is it possible for oranges to become intelligent life while still retaining some of their essential qualities such as skin that can neatly be peeled off and reproduction through seeds and growth off ...
9
votes
4answers
181 views

Is it possible to make Asteroid Concrete?

In the far future, man is trying to build a small colony in the asteroid belt - on one of the bigger asteroids. All the materials are to be mined from asteroids, and it is assumed the colony will have ...
4
votes
2answers
238 views
+500

Life in the Northern Hemisphere if Beringia Never Drowned

When one hears the name "Beringia", we most often think the land bridge that formed as a result of a drop in sea levels during the Pleistocene, resulting in a connection between Alaska and Russia. But ...
-3
votes
7answers
280 views

A Theory for Science-Fiction Time-Travel

From H.G. Wells onward, there have been many stories concerning the phenomenon of time-travel. Few of them provide a plausible mechanism. For my story I would like to put forward such a theory. We ...
5
votes
4answers
278 views

Feasibility of this Alternate History scenario (WWII France)

I was wondering about the feasibility of France maintaining a total war against the nazis in WWII following its disastrous military defeats in June 1940. Would it be possible for the bulk of the ...
8
votes
1answer
101 views

Carbon cycle in a sulphur-based biochemistry

I'm designing a world with advanced life forms that use a sulphur-based biochemistry (see this link for context). I would like to create a carbon cycle analogous to Earth, where: Photosynthesis ...
4
votes
5answers
228 views

Terraforming via rapidly growing organisms, is it a good idea?

Terraforming and maintaining a biosphere suitable for humans is tough, but no worries, Protogon is here! Collaborating with Providence, our scientists have created Hygiea, a series of rapidly growing ...
14
votes
1answer
557 views

Scaling Up Internal Mass Drivers?

Internal mass drivers are a potentially useful space drive, due to the ready availability of reaction mass (you can use anything from spare parts to literal dirt as propellant). However, on long ...
3
votes
2answers
10k views

Build a real life Flash - How to create the speedforce in real life?

In DC's TV-series (and comics), Barry Allen is The Flash: a superhero powered by the speed-force. This speed-force allows him to move incredibly fast, can be transferred to others, and there also ...
4
votes
3answers
361 views

Would human-avian hybrids be able to preen themselves with just their hands?

My winged people just have feathers on their wings, and maybe small feathers on their back between their wings (from shoulder blades to mid back). Their bodies look generally human. Here is a link ...
4
votes
0answers
663 views

Anatomically Correct Centaur [duplicate]

I am honestly surprised no one's done this one yet. The centaur is a creature from Greek myth with the head, arms, and torso of a human replacing the neck and head of a horse. Standard Anatomically ...
14
votes
1answer
2k views

Anatomically Correct: 4-legged sapient creatures (“centaurs” etc.)

This is a part of the Anatomically Correct series. If a magic-free fantasy/SF world were to have naturally evolved hexapods as humanoid as possible, living among bipedal humanoids, how would they ...
11
votes
6answers
4k views

Would evolution select for mermaids without breasts?

So ignoring all the other hydrodynamic inefficiencies associated with sticking a human torso on a fish body, let's just worry about those most distinct of human female features, breasts. The problem ...
7
votes
6answers
1k views

Is there any reason centaurs can't fit their own horseshoes?

Since the invention of hard road surfaces, a centaur would need to wear metal shoes like any other horse-like creature. Can you see any barrier to a suitably qualified centaur (a) being a ...
4
votes
2answers
329 views

Why everyone hates the undead? [closed]

After death some might turn into undead by different means of magic. when brough back to life as an undead gaining new sheer strength and magic powers is to be expected while things like sense of ...
5
votes
2answers
416 views

Anatomically Correct Typhon

Please avoid the obvious jokes. Now I know there are different versions of the Greek monster Typhon, so first I will try to describe its properties. Incredibly large roughly 50-100 feet tall, ...
23
votes
6answers
2k views

Anatomically Correct Cyclops

As a series of anatomically correct myths, here we have the Cyclops. One of the most similar creatures to man but with 'one' noticeable difference, one eye. It seems that land animals love their two ...
20
votes
7answers
4k views

Physical correctness of trolls with high regeneration ability

In my fantasy world there's the race of trolls, vastly inspired by the ones one encounters in Baldur's Gate 2 (see here). Millenias ago, they've been driven underground by orcs and elves, as well as ...
0
votes
1answer
150 views

What evolutionary abilities would crepuscular elves have? [closed]

In my universe elves are mainly crepuscular, active mostly at twilight and dawn while prey is most vulnerable. They hunt mostly large prey like deer, boar, etc.. They have sharp claws and teeth which ...
4
votes
2answers
177 views

How would a human like species be able to swallow body parts whole?

My fantasy species has the ability to swallow small to medium appendages whole. They're known for biting off and swallowing hands and feet. A snake like jaw could work but how would it still maintain ...
22
votes
7answers
9k views

Anatomically Correct Angels

As part II of anatomically correct myths here we have the Angel. Angels appear in many cultures and are most commonly seen as simply winged humans. Is there a realistic way that angels could evolve? ...
9
votes
3answers
373 views

Would centaurs shoot more accurately than a cavalryman from horseback?

The question is fairly simple. If a Mongol and a Centaur ride by and shoot at you, who has the better chance of giving an arrow a new home in your gizzard? That is, given equal skill in shooting, ...