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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3
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1answer
78 views

What are good lower and upper bounds on year length for habitable planets?

In science fiction dealing with multiple intelligent species, "year" is still often used as a unit of time - like when describing a character's age - even when dealing with species that ...
10
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5answers
797 views

Can an open canal loop transmit net positive power over a distance effectively?

I’m designing a society in a hostile climate which transports its energy from remote stations to a city with an absolute minimum of maintenance and infrastructure requirements. The concept is to use a ...
14
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6answers
2k views

How would knights train in a world with rideable dragons?

In a world with rideable dragons, what skills would you look for in a knight, and how would they train for it? For this question, let's assume: castles modified based on the accepted answer from How ...
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3answers
61 views

Warhammer homonculi grow edged weapons out of their own bodies. What should those be made out of?

As I mentioned before, dragons would be too goofy, werewolves are closer to oversized dogs, while lizardfolk are now finally part of the standard fantasy races. These creatures are more cool than ...
2
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1answer
51 views

Organic piezo-electric generation

Piezo-electric quarts are crystals used in watches, lighters, etc. to convert elastic energy into electrical charge (and vice versa) by compressing or expanding the spaces between bonds in the ...
6
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5answers
308 views

Powerful tail swipe with as little muscle as possible. How?

If you look at flying animals, they usually have small tails. For instance, giant pterosaurs. Now dragons tend to be portrayed with more devloped tails. For my dragons, their tails, and the bony spade ...
2
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2answers
179 views

Would it be possible to have an O'Neil cylinder used as a water “world” nature preserve?

Would it be possible to have an O'Neil cylinder large enough to house actual oceans and creatures like whales? What might the energy requirements be to construct this?
5
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3answers
115 views

How could one armor/defend against this hypothetical kinetic shell?

I know that this is an oddly specific question, but it was something I was wondering In my setting, lots of space navies field a hefty amount of kinetic weapons because energy weapons are highly power ...
15
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6answers
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Could negative kelvin be achieved?

What the title says I guess. I'm looking into ways to make a plausible exotic matter source for a story with an Alcubierre drive and I think recall that I saw that there was a possibility to use ...
22
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7answers
5k views

Are the draw weights of 90# to 100# realistic for women archers?

I have a clan in early middle ages when both man and women of a military aristocracy train for war. All the daughters of the warriors train archery from the early age. It is expected they should be ...
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8answers
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A secret base is built on Mars: is it noticed?

A secret society of inventors has been hiding for years. Finally, they have designed their Mars base in the year 2019! Unfortunately, they "borrowed" most of their supplies. If they were to build a ...
7
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6answers
613 views

How can a troglodytic society democratize braille literature?

Premise The surface of my world cannot support life. The inhabitants of my world sustain themselves off troglophauna and aquifers. I'm leaving the mechanics of where energy comes from in this shadow-...
35
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19answers
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Which fast STL drive could not be weaponized or results in perpetual motion?

I'm looking for a slower-than-light (STL) drive for fast inter-system travel. It should make trips from one planet of a system to another (e.g. Earth, Mars, Jupiter) with sublight speed possible in a ...
2
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0answers
44 views

Effects on World Climate without (Most of) northwest and central Europe

So I'm considering creating a fantasy setting heavily modelled on Earth with the exception that most of what we consider Northwest and Central Europe is replaced by sea. I decided to as a reference ...
7
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1answer
59 views

Autonomous homonculi vs mass-produced homonculi, which one would be more restricted by the Geneva Convention?

I needed monsters for my story, but with each added "quirk", dragons became more and more like overgrown, but well-behaved, flying housecats with scales. And I also didn't want them to be &...
2
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1answer
47 views

What Would the Climate Be Like on this Extreme Alternate Earth?

In an alternate universe, Earth orbits not one sun, but two. As you can see, both stars are orange dwarves, each one only 40% as bright as our sun. All the same, this alternate Earth orbits from ...
4
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5answers
231 views

Would it ever be possible to “vaccinate” against feelings/ideas/beliefs?

If we think of some world views as viruses... Would it hypothetically be possible to create a vaccine for this or, in another way, make a person immune to these views? I'm thinking racism, xenophobia, ...
86
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19answers
24k views

Humans can now run 40 mph. How do I keep the stupid people alive?

Let's assume that humans can now run 40 mph and the human body can handle it. I know and understand that this is not feasible, but let's just play pretend. Naturally people would have all kinds of fun,...
5
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4answers
207 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 ...
4
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2answers
127 views

Difference between F type stars and our sun

I'm writing a science fiction series. I have an intelligent nation of reptilian people who live on an Earth-like planet orbiting an F-type star. This nation needs to bask in the sun. How will the ...
6
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2answers
174 views

The best type of reconnaissance for modern dragons?

My dergs: About the size of a large draft horse, 12-meter wingspan, human intelligence, able to talk in human languages. Scales are very tough, but an armor-piercing round from an M2 Springfield bolt-...
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2answers
179 views

What would be the ideal of beauty in a world of a completely female human species?

This is a very hard question, if well the future and sociocultural interactions are hard to predict and many times could be wrong, but with the enough antropologic investigation comparing historical ...
3
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2answers
100 views

In This Picture, How Far Can One Binary Orbit the Other?

In an alternate Milky Way in an alternate universe, there is a cluster of stars so dense that nights are over 60 times brighter than our full moon. In that cluster is a solar system presented (albeit ...
2
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2answers
88 views

The chemistry of a long living (alien) animal

I would like to have in my story an animal alien species with a long lifespan. By 'long' let's assume an average lifespan of 7000 (Earth) years to give a rough idea. Would be nice to give a scientific ...
9
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4answers
266 views

Could a species of marine mammal evolve from humans?

I want to write a science fantasy novel about humans evolving into five new species. The five races are: the Groses and Grosettes (they are my Ogres) (their name comes from the french word gros/grosse ...
5
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4answers
298 views

Detecting an escaping Earth

Suppose that, some day, for reasons, the Earth is mysteriously accelerated prograde until it reaches escape velocity. It then starts a trajectory that will take it off of the solar system. It might ...
7
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9answers
212 views

How could the sword be a viable weapon against modern technology, with the advantage of science-based superpowers?

The atmosphere in the Judging Hall was stretched so thin that it seemed like it would snap at the slightest blink of an eye. On one side of the hall sat the Master Judge and his guards, his hand ...
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3answers
283 views

Toilet for Mermaid?

I want to know a kind of toilet design for a mermaid, considering they live surrounded by water and they poop through the anus (or whatever the organs name is) that is located in the front rather than ...
7
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0answers
73 views

Evolution of sexual parasitism in a species with small and intelligent females but large and “brute” males?

So, I had this idea about a sapient alien specie paritally based on the reproduction of the schistosoma A flat worm specie in which the male is notorious bigger than the female, and this have a ...
2
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3answers
157 views

How can a civilization tell that their “Sun” is actually a black hole emitting hawking radiation?

Imagine a primordial black hole so heavy that it is a blackbody and there are many planets orbiting around it, there is a moon thriving with intelligent life orbiting a gas giant. I am wondering would ...
2
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0answers
72 views

Orbital Warfare Maneuvers

So lately I’ve been re-rereading (again) some of the articles on Atomic Rockets and I was metaphorically struck by the idea of orbital combat as presented on the site. To summarize, it involves using ...
6
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0answers
97 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 ...
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2answers
75 views

Tidal Effect of Twin Moons

In order to account for an immense amount of technological and cultural disparity, I have been attempting to figure out ways that the world in a setting could be extremely hostile to travel. The idea ...
2
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2answers
112 views

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 ...
4
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3answers
121 views

What is an alternative way “plants” could have evolved to collect energy from the sun besides photosynthesis?

This is for a planet similar to earth, in that the main energy source is a sun. Is photosynthesis the only way to obtain energy? The best example I could find is the Oriental Wasp and it's ability to ...
10
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6answers
2k views

Could a plant be engineered to live in a vacuum?

Could an artificial plant species be designed and created that lives in a vacuum - for example on the surface of our moon? The main problems I can see immediately would be the lack of an atmosphere ...
4
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3answers
113 views

How could death hold its value if resurrection is widely available?

Sadly, plain resurrection is much simpler and scientifically more plausible than traveling back in time. However, time travel has the intrinsic drawback of erasing the progress you've made after a ...
8
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2answers
215 views

How far would a goblin-powered plane go?

There are a few flying questions lately and this got me thinking. Someone suggested that a centaur might power a plane via a bicycle. I don't think this would work out, since the centaur would be very ...
6
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4answers
179 views

Unique take-off strategies for six-limbed creatures?

So, dragons, gryphons, what have you. They're usually (before Skyrim and Game of Thrones in the dragons' case) depicted as six-limbed, quadrupedal creatures. Now, the thing is, staying aloft is much ...
2
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0answers
92 views

Would dragons be able to purr?

My dragons have a... "difficult" personality. They're very catlike. Sure, they're more like KrimsonRogue's cat (somewhere around chaotic good). But, if I want to make my dragons smug, blue-...
2
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1answer
52 views

How could hydrogen in a vacuum be removed/extracted?

What reactions or process could remove hydrogen from the vacuum without compromising it, then from there a way that animals could do it, the vacuum is in a rigid space, but hydrogen still seeps ...
5
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1answer
151 views

how could a creature have a vacuum chamber inside its body

i want to know how an animal could have a vacuum inside itself (in an organ), survive, and also for it to be stable, what materials could be used to contain it, and how could it be implemented without ...
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2answers
191 views

How would a dragon fly, give it all you got, the dragon has 4 wings, and has an avarage (edited) 300Kg weight

The dragon's weight can be reduced, by a mixture of lighter than air gases, heated air, vacuums etc. I have done some research, but I forgot the equation, this was for a 6000 kg bird, how large does ...
10
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3answers
2k views

What happens to corpses left in a desert for many decades?

Consider a hot desert with temperatures between 30-40 degrees Celsius year round and 100 mm of precipitation annually. Suppose some corpses are placed on racks and predators are kept away. Sand is ...
10
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7answers
372 views

How can tengu avoid being conquered?

So, I decided to replace elves with tengu, a race of six-limbed humanoid birds. Firstly, because I'm tired of seeing Legolas everywhere. Second is that compared to a bog-standard human-elf romantic ...
5
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7answers
513 views

Industrial Prerequisites for Mechanized Warfare (Post-Apocalypse Edition)

So the Human World has fallen apart: the grid is down, governments have imploded, the economy is in shambles, people have died in the billions, global warming has made severe weather (much more) ...
3
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4answers
242 views

How much neon would need to be in an Earth-like atmosphere to tint it considerably orange/red?

I'm creating a planet for a game I'm making that has orange-red skies. My explanation that I've currently come up with is that the atmosphere has a much higher neon content than Earth does. At the ...
3
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2answers
107 views

Effects of a Rapid Fire Nuclear Weapon on the Environment

One of the weapons I'm planning on having a character use in a sci-fi world is a rapid fire nuclear autocannon. While the strategic use of nuclear weapons is common on inter-galactic battlefields, an ...
15
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5answers
1k views

Could a rogue planet be the host of a planetary system?

That is to say, could a planet be big enough to have other planets orbiting around, while not orbiting around any star? Cha 110913 seems to be close to what I'm looking for, but its classification is ...
3
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3answers
183 views

The consequences and the mechanisms of a shift of the Earth away from the sun [closed]

I started to write a story that is about a huge and catastrophic climate change. The story is narrated as a series of unconnected episodes (in large part) that have different protagonists from around ...

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