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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1answer
90 views

Feasibility of a gas giant made of oxygen and water vapor?

In a distant galaxy, there is a young, yellow-white star. Orbiting this star is a gas giant comprised almost entirely of oxygen-nitrogen, and water. In its core, there is a relatively large nickel-...
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8answers
4k views

In a world with time travel, would it be possible to be your own mother's mother?

Given that you can travel back in time and have a baby there, or alternatively, send your baby back in time, would it be possible that this baby one day becomes your own mother (gives birth to you)? ...
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2answers
157 views

Consequences of a huge electromagnetic burst

This is a sci-fi setting. We have a planet with carbon-based life forms. This poor planet was exposed once to $10^{32} J$ of electromagnetic radiation of wide spectrum (from visible to gamma rays) ...
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2answers
81 views

How could humans control a body made of nanobots?

My species lives on a world that is filled with very few storms, lush environments, and naturally forming metallic monoliths. The species are like humans, but one thing that sets them apart from ...
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9answers
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Are Geologically Dead Planets Habitable?

One of the planets I'm thinking of for my book series has all of its landmass in the northernmost half of the northern hemisphere (it is thus mostly a water world) and is completely geologically dead. ...
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4answers
215 views

Could a species evolve to the point were they cause their own extinction

We know that in biology, a species evolves to better survive its planet and its various climates and geography, which is mainly a result of natural selection. But, sometimes, this natural selection ...
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3answers
233 views

What would be the best metal deposit a colony of dwarves to sit upon? (except iron)

The setting for this question is a classic one, a large group of dwarves go out to settle a far away land, but this land almost completely lacks usable iron resources. Yet our brave dwarves have setup ...
4
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1answer
61 views

Silent Planet: Effects of Natural Psionic Evolution on Communication Tech?

“Imagine that. A planet teeming with life, entwined with one another with mere thought and nothing more. A silent harmony, a quiet world.” Context Through some still unknown science, and on this ...
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3answers
79 views

Could my a highly advance species exist without a written or spoken language

One thing that nearly every multi cellular organism and complex thinking species is communicate, either it be pheromones, chemicals, chirps and sounds, symbols and shapes, to even complex sentences ...
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2answers
96 views

Could my species exist naturally

The species I have created, are a species of gliding reptiles. They look primarily like horned lizards and measure up to 20 feet long, 7 feet wide, and 5-6 feet tall. however, they posses wings that ...
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2answers
141 views

Anatomically Correct Vanara

Apart of the Anatomically Correct Series Vanara The Vanara is a group of people who lives in the forest in the Hindu epic "Ramayana." In there, it describes them as human-like, with reference to ...
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3answers
146 views

Defeating Nanomachines?

Key Information In this universe biomechanical augmentation (similar to Deus Ex 1) has become singular. While they still have a ceiling in terms of upgradability, manufacturing grade (civilian, ...
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31answers
13k views

Why would my species expose their brains through a glass dome?

The species I have created looks eerily humanlike, practically indistinguishable from human except for a reptile-like tail and an exposed brain. The top portion of the skull is replaced with a glass-...
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4answers
169 views

Could a creature evolve a cubic brain?

One thing that is fairly common amongst nearly every macro-scale living thing on this planet is the brain. The brain controls when creatures breathe, move, talk, etc., but the brains of said living ...
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14answers
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What problems would arise for the human species making itself into robots

In modern day society, few or many people have been fascinated with integrating robotic parts to their bodies. But sometimes that idea is taken to the next step, in which people want to have their ...
6
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1answer
126 views

What Prevents Gigantic Monotremes From Evolving?

Monotremes are the oddballs of the mammal family, the echidnas and especially the platypus are absolutely absurd creatures with their bizarre anatomical features and mishmash of reptilian and ...
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0answers
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Would a Interplanetary, Totalitarian System Still Work Under This Government? [duplicate]

To make a few limitations doctrine-wise: This religion/cult is headed by a single entity (claims to be God within a vessel) with various Lesser Gods acting as privy council Promises salvation through ...
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2answers
61 views

Individualist Intelligence

Under what circumstances could an inherently individualist species become intelligent and advanced? Usually, animals require social interaction for intelligence to develope. Or at least that's what ...
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5answers
437 views

An effective way for interstellar communication?

Radio waves travel at the speed of light. Communication across vast interstellar distances is difficult due to weak signals and slow multi-year duration. I honestly imagine it to be like old times ...
3
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1answer
62 views

What signs of nuclear explosion in SLC can be seen from Lincoln Highway?

First thing: I don't know if it's the right stack to ask this question, so I'm sorry if it's not. I'm writing an adventure for an apocalyptic RPG session. One point of the plot is a detonation of 100 ...
2
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1answer
105 views

Is it possible to crush a human neck? [closed]

One of the character's in my story is a overly-augmented augmented warrior (has a terminator-esque endoskeleton beneath layers of dermal plating and everything) and at one point grabs someone's throat ...
4
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4answers
141 views

How long could this wildlife habitat sustain itself?

In my story a group of characters will be sent to a space habitat which contains some of the deadliest alien creatures for a survival training mission. The majority of the species will be carnivores ...
6
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7answers
2k views

Would my species even create a government?

My species are INCREDIBLY individualistic, self-centered, and independent. Evolution has promoted and favored individuals whom can, and prefer, to stand on their own, utterly unaided. My dilemma is, ...
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3answers
84 views

How could a portable handheld weather machine work?

Intro: As some of you may know, the character shown in this picture is none other than the Weather Wizard, one of the Flash's most dangerous adversaries. With the help of rod-like device in his hand (...
2
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3answers
197 views

I was brought back to life after being frozen in time, how do I know if I'm a copy of my original consciousness or if I'm actually the real me? [closed]

Year 2038, I died and was frozen for almost two centuries. They managed to bring my flesh and bone back to life but is my consciousness the same? What if my real self died forever? What if my ...
3
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3answers
319 views

Could Bronze-Age Nomads Effectively Utilize Chariots for Warfare?

Horses were first domesticated on the steppes around 3500 BC, but the horse would not be ridden directly into battle for at least two more millennia. Instead chariots ruled the battlefields of the ...
6
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3answers
134 views

How would a giant reptile creature hunt in a desert?

I'm talking about place similar to the Jordan desert, where the biggest prey is similar to wild donkeys and antelopes like oryx and gazelles. My creature is 1.92 meters tall and 4 meters long, looks ...
7
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11answers
518 views

Planet where animals capable of flight couldn’t evolve?

Let’s say you have a planet called... Galileo. Galileo has a large level of biodiversity, with bacteria, plants, fungi, and animals. The animals are what I’d like to focus on today. Unlike Earth with ...
4
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8answers
277 views

Is The Use of Mounted Infantry a Viable Tactic for a Nomadic Empire?

By “Nomadic Empire” I am referring to an expansionist power that resembles the empires created by Eurasian Nomads throughout history ranging from the Scythians, Huns, and of course Mongols. Their ...
6
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3answers
152 views

Flying commercial airliners with ground power?

A thought occurred to me, and I wondered if it could be made practical... This video talks about the possibility of electrical battery powered planes, and in short, while it may be practical to build ...
1
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3answers
202 views

Feasibility of making a imploding bomb

In a dystopian story I’ve created, humanity is in a near constant war, but is still more advanced than modern day humans. One weapon that is used in this war is called the “I.N”, short for imploding ...
8
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8answers
347 views

“Technological purge” in response to singularity-type event

It's modern day, and a newly emerged artificial intelligence threatens humanity. Originally designed as a highly-adaptable Stuxnet-like virus for military use, it grew beyond the bounds of its ...
4
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1answer
83 views

Growing organic tissue over a machine

In a short story I created, humanity encounters a sentient and consciousness messenger that is alien in nature and origin. Upon further examination, it turns out that there is organic tissue grown ...
3
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1answer
108 views

Benefical Bone Mutations [closed]

In the far future where a government is seemingly capable of traversing through universes, when people die, their consciousness stored in a simulation for ever, and they live happily there. Then a man ...
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1answer
80 views

Why would a man transfer humans consciousness into a simulation with skeleton bodies [closed]

In the far future where a government is seemingly capable of traversing through universes, when people die, their consciousness stored in a simulation for ever, and they live happily there. Then a man ...
3
votes
1answer
71 views

Could a human body function at a lower mass density?

I have a species of humanoid in my story that are very light due to the matter that makes up their bodies having a lower density, I was wondering whether or not this would be realistic. My questions ...
8
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3answers
3k views

Would “land assist” technology be possible in real life?

In the game Call of Duty: Advanced Warfare, characters wear exoskeletons with an ability called "land assist", which allows them to slow down their fall using a jet of compressed air (or some specific ...
3
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2answers
95 views

Magic system involving contracts with a mysterious being [closed]

I am planning a series of fantasy novels, want to make sure my worldbuilding makes sense. I will focus on the magic system for now but I do think that some basic context of what kind of story I am ...
1
vote
1answer
153 views

Feasibility of humanoids that evolved from slugs?

I was inspired by Phylliroe molluscs which are sea slugs that have evolved into translucent fish (see image bellow). In my story most aquatic life on earth had evolved from these translucent slugs ...
2
votes
1answer
32 views

Volcanic island generating its own storms

Picture this, a highly volcanic island sitting in the middle of a temperate or sub-arctic sea, the heat generated by the magma beneath the island and the volcano heats the air enough to generate a ...
-1
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2answers
146 views

Anatomically Correct Behemoth

This is a submission for the Anatomically Correct Series roaming vast deserts some characteristics of my Behemoths include: being slightly larger than Paraceratherium having longer forelimbs than ...
4
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2answers
72 views

How might a group of hominids keep an accurate record of their history?

In my story Halflings and Goblins have a somewhat accurate knowledge of their history, despite being spread over multiple continents. Now for the longest time humans weren't that good at keeping ...
-2
votes
1answer
123 views

Design for a working Vibroblade

So, a common sword found in sci-fi (other than lightsabers) are the Vibroblades, swords that vibrate to increase the ease of cutting into other materials. With such a blade, one needs less effort to ...
4
votes
4answers
207 views

Feasibility of a virus that causes its host to crave sex?

In the near future a man-made virus was released which caused a world wide epidemic in humans and animals , the virus completly shutsdown all cognitive functions in the brain leaving the host in a ...
4
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2answers
122 views

How do I preserve my Wendigo Prion?

Wendigo fever is a Prion (credit goes to SE is too politically correct for the idea) which is spread by the consumption of tainted meat. the main problem I have is to my knowledge Prions are solely ...
3
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4answers
1k views

Can a crystal grow or propagate faster than 'c'?

We have, perhaps, all experienced those 'heat' packs wherein a local disturbance causes a crystal structure to rapidly dissipate through the medium, releasing heat in the process. Nothing really '...
46
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15answers
7k views

What would be the consequence of a traffic light system where the users with green light pay the users with red light?

Traffic lights are mechanisms that control the usage of intersections. I'd like to perform a thought experiment for an alternative mechanism. The basic idea is that the intersection is a shared ...
6
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7answers
1k views

Transhumans that replace eating with breathing

We are in a far future setting where humans (or transhumans I should say) achieved two things: be able to modify themselves genetically to the point where they can have completely different organs to ...
2
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1answer
101 views

Building Island in Pacific Ocean by pouring continuous lava

I'm thinking to build an island by pouring lava into the ocean, with the advanced technology, around 40 years later, by making a special pipe connected to the ground (maybe near volcano/es) since the ...
3
votes
1answer
114 views

Could a Greater Relative Abundance of Tin Extend a Bronze Age?

Bronze is an alloy of copper and tin, and copper is a significantly more abundant metal in the Earth’s Crust, at about 70 PPM compared to tin at 2 PPM. Because tin was the limiting factor in bronze ...

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