Questions tagged [science-based]

For questions that require answers based on hard science, not magic or pseudo-science, but do not require scientific citations. Contrast with the hard-science and reality-check tags. Do not use this tag as the only tag on a question.

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7
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4answers
2k views

What needs to be changed in the structure of the human body in order not to die from cyanide?

Cyanides are the most powerful poisons that affect the mitochondria of cells. A cyanide poisoned cell loses its ability to breathe. In mitochondria, cyanide acts on the cytochrome oxidase enzyme ...
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1answer
219 views

What kind of wounds would a pulsed laser weapon really create?

Lasers and other heat-based weapons in sci-fi are often misrepresented in how they deal damage. A common reaction to heat based weapons like lightsabers, laser rifles and plasmaweapons is to say they ...
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2answers
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What needs to be changed in the human cardiovascular system so that he does not die from blood loss or cardiac arrest?

What needs to be changed in the device of the human cardiovascular system in order to survive in case of serious blood loss and not die in the event of blocking of vital arteries or cardiac arrest? So ...
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1answer
89 views

What needs to be changed in the structure of human lungs to be able to filter the inhaled air from heavy particles and toxic gases?

What needs to be changed in the structure of human lungs to be able to filter the inhaled air from heavy particles and toxic gases? For example, mine air can contain gases such as nitrogen ( This ...
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8answers
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Why does fantasy racism exist in my world if there isn't a reason for it? [closed]

In order for you to be able to hate a certain group of people, they must fulfill two criteria: They're within your vicinity You have some a (real or perceived) conflict of interests with them In my ...
5
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1answer
176 views

Could this planet's tail be visible?

I have 2 planets, a hot Jupiter with a standard majority Hydrogen/Helium atmosphere (Ab) & an Earth-like planet(Ac) orbiting around an orange dwarf star (A) which is very similar to Epsilon ...
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13answers
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Using our current understanding of science, is it possible for biologically plausible animals to be resistant to our current military weapons?

More of a theoretical idea but the implications can help with a lot of worlds and ideas. A no is as welcome as a yes. The most detailed answer is the best as usual. In many stories set in other worlds ...
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6answers
561 views

Species that can create magnetic fields

I am trying to come up with an explanation for how a creature could create strong magnetic fields with a high level of control. I'm thinking that their 'writing' would be similar to how computers ...
2
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1answer
70 views

Fighting a Nanite Attack on a Biological System

How would you fight a nanite attack on a biological system (preferably one that has already incorporated nanites? Assume that the setting is 10 to 20 years in the future and nanites are commonly used ...
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3answers
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What needs to be changed in the human body to adapt it to the cold conditions of the tundra?

A person who is not dressed for the weather may develop hypothermia in the cold. This word is called a state when a person's internal temperature drops below 35 degrees. The dangers of its ...
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2answers
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What needs to be changed in the human body in order to adapt it as best as possible to the harsh conditions of the desert?

Humans can not only survive, but even work in dry air up to 120 ° C (250 ° F) for a few minutes and up to some 70 ° C (160 ° F) for several hours if they have access to cool water. In humid air, not ...
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1answer
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How can room sized amethyst geodes form commonly?

I would like my Earth-like planet to have a very strange feature. Near spherical amethyst geodes with diameters up to 11 meters - the size of a large room, form commonly underground at depths from 30 -...
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1answer
145 views

How should the human digestive system change to be able to go without food for many months?

A healthy adult without special training can endure complete deprivation of food for 25-30 days, provided that water is available and physical effort is saved. But, a 1973 study by doctors at the ...
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3answers
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How much can I expand human color perception by adding new photoreceptors?

Normally, the human retina contains four types of light-sensitive receptors (opsins): three types of cones and one type of rods. Receptors contain proteins-chromoproteins - iodopsin in rods, ...
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1answer
63 views

What is the environment after a sea is dried [closed]

In a world where a portal has sucked the water from a small sea, what may the environment be like 30 years on from this event; only a salt water lake remains, infested by minions of chaos at the ...
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2answers
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If all life on Earth was exterminated, how long would oxygen remain in the atmosphere?

There are numerous other question on this site about "If oxygen production stopped...?" but all of them appear to still have humans around. This question is different. In my scenario, we ...
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1answer
137 views

Lizardmen, gigantothermy, and the energy demand of resting muscles. Could it work out?

One common trope, associated with lizardfolk from Castlevania to Overlord, is their weakness to cold. Now, while it is a fun gimmick, it leaves the problem that lizardmen in Overlord are shown to be ...
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4answers
269 views

Would reducing drag be a good reasons for bird people not to wear much besides a loincloth when in civil?

I feel that most of my non-human civilizations are somewhat samey. While I could justify it with the fact that they were all the creations of the same two white fixers, I thought I should emphasize ...
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2answers
112 views

How close to a magnetar could a generation ship get?

In the news recently, it has been discovered that the fast burst radio waves are coming from magnetars. It is doubtful that a habitable planet could form anywhere near one, but such a star would be an ...
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0answers
89 views

How Bright Would the Sky on This Alternate Earth Be? The Sequel to “The 372-Day Calendar”

Long ago, I asked how far Earth would orbit the sun if one year lasts 372 days instead of 365 and how much it'd affect the overall brightness. What I got was that Earth with a 372-day calendar would ...
4
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1answer
178 views

Entity that crystallizes everything it meets

I’m writing a story where a plague/virus/pandemic infects a whole bunch of people and plants and crystallizes them. Stuff to know: Can be any living thing that is preferably hard to see without a ...
5
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1answer
158 views

How realistic is this orange dwarf star?

For my world building project, I have an (on the large side) orange dwarf star with these parameters: Mass: 0.75 solar masses Radius: 0.8 solar radii Luminosity: 0.36 solar luminosities Surface ...
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1answer
148 views

Sugar World Formation?

I was watching Star Wars the other day, when the scene came to that salt-covered planet, Crait. I was wondering, would it be possible for a planet to have flats and mountains and other geological ...
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2answers
66 views

How to maintain asexual lineages in plants for millions of years while maintaining real-world assumptions? (non-microbial)

I think having some fairly complex life forms in world's biosphere being asexual for a long time would add a lot in terms of mystique and spur lore engagement. I was intrigued by some discussion on ...
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2answers
165 views

Deuterium Fusion Reactor + Direct Energy Conversion - what sort of stuff would this sort of reactor need?

Looking at 3D Modeling a Deuterium Fusion laser-based reactor that outputs to a direct-energy conversion (tube or something?) based off Halo lore. (WIP fan project of mine, modeling a UNSC ship from ...
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9answers
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Allowing “drop of the hat” spacewalks?

In real life, astronauts spend upwards of a day preparing for spacewalks, mainly acclimating to the lower pressure in their suits and adjusting to breathing pure oxygen. If they don't do this, and ...
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2answers
300 views

What should be used to build a building that can stand for several million years?

According to the plot of my story, on the territory of one of the ridges of the trans Antarctic mountains, a monument was built of unprecedented scale in comparison with the previous ones. Possibly ...
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2answers
160 views

Man throws himself into frozen river to die, how long can he survive? [closed]

I have character that has been on a path of destruction for a bit too long and decides to finish it all He can't swim. River's temperate is about -5c. And it is a deep river So. after all the story ...
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8answers
6k views

Is it a good idea to shove your arm down a werewolf's throat if you only want to incapacitate them?

So, I decided to change subjects... for a little while. I also have werewolves (they don't transform, though) in my meta-setting. Now, they're very much humanoid, though more wolflike in other areas ...
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2answers
466 views

Possibility of forced thinking [closed]

Would it be possible to electrically trigger the brain to do certain things? For example, if you shock a muscle in just the right place, it contracts. Could a similar practice be done on a brain to ...
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2answers
126 views

What needs to be changed in the structure of the human brain in order to give it better multitasking?

The brain of a modern person can execute dozens of thought processes without overflowing. And parallel multitasking has a clear survival advantage. How do you need to change the human brain (if ...
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1answer
61 views

Internet access at GEO

High-bandwidth internet in orbit is nothing new; the ISS even has a livestream. But that's in low-earth orbit, well below the geostationary satellites that relay the data. My question concerns ...
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2answers
71 views

How to prevent submerged hard-shelled eggs from “drowning”?

I've got this not-too-hard Scifi setting that has a race of snake people, inspired by boa constrictors, that live in a Amazon-like forest near the riverbank and have affinity to water and swimming. (...
5
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4answers
206 views

Sun rising from different directions throughout a lifetime

I'm fascinated by The Dark Tower series of books by Stephen King. One of the aspects that I love most is the distortion of space and time: Roland's world is said to have "moved on", and it ...
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4answers
1k views

Does this magic system violate the laws of physics?

I’m writing a story and the summary is extra universal aliens going to war with each other The magic system used is Clarketech known as the void system it’s more or less based on this formula Magic = ...
3
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1answer
117 views

Better vision than eagles?

Eagles have much more perfect vision than humans, which is explained by the fact that their retina is much more densely dotted with so-called cones - special light-sensitive cells. It is like a ...
5
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6answers
960 views

What anti-asteroid measures can we take now, or in the near future, if we faced an alien invasion?

Just like the title. A splinter fleet alien group arrives and long story short some human scientist explains to the president of his country that they might decide to weaponize asteroid against us at ...
4
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1answer
165 views

Is it possible to determine the colour of a molecule?

Is there a way to determine the colour and appearance of a large biomolecule? If no one had seen chlorophyll, simply knew of its existence, would you, from its formula, be able to determine that it ...
4
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3answers
136 views

What kind of environment would cause humans to adapt to crawling?

In my setting humanity is setting out to colonize space with very advance terraforming technology. A group of colonizers has terraformed a planet to be habitable for humans. But an accident happens ...
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8answers
2k views

How would blasting a barrage of arrows with heat affect the metal arrowheads?

The question is about stopping arrows fired as a barrage by an army far away. You control fire, and suddenly blast the entire barrage of arrows with fire hot enough to incinerate the wood in a matter ...
3
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1answer
125 views

Radar-absorbent natural materials?

This one is kind of short. We know of natural materials that can interfere with IR, such as a polar bear's fur which, along with its blubbers, makes them nigh invisible on thermal cams. The TL; DR ...
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1answer
98 views

what I need to make mirage to constantly occur in sand desert?

I want to make a desert known to always generate mirages (I don’t mean it necessary occur during night though, only during a day is fine too, but if it possible for mirages to happen during the night, ...
2
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3answers
216 views

What's the best fuel for a lander?

For background, read my question. What would be scientifically the best way to get the lander out of the atmosphere? It is 12ft high and 15 ft long. It's about 11,000 pounds of dry weight (tell me ...
4
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2answers
112 views

Where to begin when designing functioning alternative biochemistry for alien organisms in non-earthlike conditions?

I am building a habitable terrestrial 'super-earth' type planet. Ideally, my lifeforms should be primarily carbon-based and their biochemistry relatively similar to Terran biochemistry, but with ...
5
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0answers
95 views

What blood pigment type is immune to ammonia poisoning?

I am designing a world in which the biological solvent is an ammonia-water mixture and need help finding out which blood pigments (Hemoglobin, Hemocyanin etc.) would be immune to the negative effects ...
4
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2answers
133 views

A Scientifically Plausible Platform-Independent Information-Destroying Monster? [closed]

I have dragons, unicorns, gryphons, whatnot. They live happily until the evil Monster Hunter Association shows up and starts killing them for sport. Well, it didn't happen yet, but I received intel ...
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3answers
218 views

Anatomically Correct Cthulhu [closed]

I am interested on writing an anatomically correct Cthulhu, made by HP Lovecraft. Some information we know about him: Can make people go insane just by the sight of him. "Sleeps" for ...
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2answers
114 views

When can I have my megastructures? [closed]

I'm building a science fiction setting. The present is just like ours. Some time in the middle of the 21st century, humanity invents technology that allows travel to nearby stars within months. By the ...
2
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4answers
133 views

Is it possible to have train but not have guns? [duplicate]

For a setting I'm working on I have an evil empire that I need to be highly connected as opposed to more medieval or earlier states low connectivity. I'm sure Roman roads were great but still we are ...
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3answers
221 views

If string theory is the theory of everything if one of my characters knew how to manipulate the vibrating strings could they do anything? [closed]

In my universe magic is an underlying energy that is in everything, users can use it to perform simple tasks however their knowledge of how the universe works limits what they can do, if string theory ...

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