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.

Filter by
Sorted by
Tagged with
0
votes
2answers
19 views

Anatomically Correct Grootslang

This is a submission for the Anatomically Correct Series Residing in South Africa, the Grootslang is a creature of African folklore being depicted commonly as: Being 37 to 40 ft long having a cobra ...
5
votes
2answers
29 views

Anatomically Correct Kelpie

This is a submission for the Anatomically Correct Series Residing in Scotland, the Kelpie is a creature of Celtic folklore being depicted as: looking like a black horse residing in lakes and pools ...
4
votes
2answers
34 views

Sensors for a clockwork/fluidic robot?

So, mechanical computers are a thing, as are pneumatic and hydraulic actuators. Combining those ideas, it's not that hard to design simple purely-pneumatic/hydraulic robots--provide them with a ...
4
votes
3answers
60 views

Would it be possible with current rocketry to go from Earth to Mercury and then come back?

Leaving aside the matter of how well would humans fare on the surface of Mercury (we only have to factor in the weight of their life support: air, water, food and spacesuits), and assuming materials ...
8
votes
8answers
807 views

How might my futuristic interstellar civilisation have missed a Dyson swarm on their doorstep?

It's the future. The setting is about as "hard-ish sci-fi" as it is possible to be, with the one big exception of a viable FTL engine. Humans have began spreading out into the galaxy, colonising ...
8
votes
2answers
65 views

What average global temperature would optimize Earth for human habitability?

The year is 2100. While climate change has wrought serious damage to the biosphere, humanity has at last managed to become carbon neutral, and has even developed technology that can be used to reduce ...
3
votes
0answers
37 views

Bleeding as the bodily equivalent of a positive pregnancy test, Plausible?

One of many things that differs the pregnancy of my Keplerians and that of humans is that in Keplerians, there is a symptom that is equivalent to a positive pregnancy test. To explain this, first, I ...
2
votes
3answers
122 views

What would a darkness effect capable of blocking all electromagnetic radiation probably do?

(As of 2020, February, the 19th, 12:23, I have decided to use a different method than the one originally proposed. The method itself answers the question) Imagine a spell an effect of utterdarkness. ...
5
votes
3answers
114 views

Navigating a sea of sulfur hexafluoride

Sulfur hexafluoride is pretty awesome. It is a gas six times denser than regular air, and thus you can actually make tinfoil "boats" float on it. It also makes your voice deep when you breathe it in. ...
4
votes
2answers
63 views

Developed, highly advanced metropolis short on exotic foods

I have this setting, about an advanced city state in the middle of a sparsely inhabited wasteland/grassland type area. This state has the 90's level tech on consumer level, and a wide range from 90's ...
3
votes
1answer
67 views

How fast would a gas giant, or very close moon, need to orbit to maintain distance?

I have noticed that there is a common theme in science fiction art to depict one or more very large planetary bodies in very close proximity to the surface of the other world being depicted. (you can ...
5
votes
4answers
203 views

How to hide a spaceship visiting Earth?

So, me and the boys have decided to take a trip down to Earth for reasons that matter not be it science, leisure or fleeing persecution. It is no concern how we blend in but our spacecraft poses an ...
9
votes
7answers
2k views

What would be the best way to capture a Giant?

After years of meticulous planning and crushing any and all opposition I've set my sights on conquering other races and nations. One group that I believe would be a valuable asset for my expanding ...
1
vote
1answer
97 views

How much DNA half-siblings do share? [closed]

Title is pretty self explanatory, but how much DNA would half-siblings share if they had the same mother ? I'm asking for a very specific reason. I'm writing a book in which some boxes can only be ...
1
vote
1answer
44 views

How might a sea wyvern adapt its flame breath?

Sea Wyverns (name not final) nest on small, rocky islands scattered throughout the sea and primarily catch fish going somewhat below the water. Basically, wyverns ingest a piezoelectric crystal which ...
4
votes
0answers
52 views

How would a Jupiter sized planet impact humanity? [closed]

So while worldbuilding I was pondering the effects of such a large planet on humans and their development alongside magic, technology, society, etc. So the planet is like Earth in water/land ratio, ...
6
votes
3answers
73 views

How would the weather and organisms and flora be affected on an Earth-like planet with floating continents?

I am currently writing a script for my graphic novel. My novel is in the fantasy genre and I use energy-based hard magic (that is energy-based magic that has its sort of "science" and rules). So I don'...
-1
votes
0answers
14 views

Creating a plausible Griffin [duplicate]

griffins are a fantasy staple I want to put my own realistic spin on this classic.Some characteristics of griffins include: are Tetrapods are slightly smaller than a lion can fly or at least glide ...
3
votes
1answer
65 views

How might someone live for thousands of years?

A long time ago during the last ice age an early hunter gather human encounter an unknown entity (likely a alien) who granted him the power of immortality with him living at least up into the middle ...
2
votes
1answer
54 views

Immunity from all infectious diseases?

The human body can create a quintillion variants of antibodies.   Resistance to infectious diseases is mainly carried out by the methods: White blood cells (white blood cells) and phagocytes. White ...
0
votes
1answer
100 views

I have a way of giving something negative mass. Did I just end the world,or usher in a golden age of space travel?

So, somehow, I have discovered a process that makes an objects mass negative. Not its weight, its mass (although, I guess that the weight would also become negative). The thing is, before I try it, I ...
5
votes
6answers
596 views

Why would humans be the dominant species?

Humans, in most fantasy stories including in my own, are the dominant species. Why is that? Firstly, I guess I should give every race in my story strengths and weaknesses. Humans (same as us) have ...
3
votes
4answers
70 views

Malicious Infection Transmitted Across Outer Space

If an extraterrestrial race were to send a signal to earth containing a virus (technological or psychological), how could that signal then infect our technology and then be received by humans?
7
votes
14answers
5k views

Effectiveness of a glowing hot tungsten sword against medieval era knights?

A blade made out of tungsten alloy that’s also electrically heated to 3000C. The shape and sharpness is similar to a katana. The user carries a battery pack that provides enough energy for the sword ...
1
vote
1answer
52 views

what organs or modification needed to have plants that drink liquid blood?

so in my world the rivers and lakes (not sure about the sea yet) are made of blood that'll never dry up. The blood maybe fresh or not (I still haven’t decided yet,probably both anyway) i also haven’t ...
2
votes
4answers
111 views

Perfect centrifuge crew quarters for a interstellar spaceship?

I want to design a realistic interstellar spaceship that uses centrifugal force for only the crew quarters. But while looking up for designs I found the most common ones are the torus or ring design. ...
0
votes
1answer
66 views

Could the Orang Pendek exist?

The orang pendek is a cryptid that reportedly inhabits remote, mountainous forests on the island of Sumatra (likely evolving from orangutans) and are depicted as: being 150cm (4.9ft) tall have ...
2
votes
1answer
84 views

What adaptations should a utility fog, that's meant to be an air-fuel explosive, have?

I found a way to ensure that even if either the Japanese Self-Defense Force or the U.S Army invades my fantasy world, its inhabitants would still have a fighting chance. Utiltiy Fog Hall thought ...
3
votes
2answers
109 views

The eating habits of metabolic wizards

If wizards had to draw energy from their bodies, using only existing biological processes and bound to vanilla human metabolism rates, how would they be inclined to maintain their bodies and diets to ...
0
votes
0answers
48 views

Humanoid species with Fully rotatable and foldable joints

I am creating a humanoid species for my setting and I thought of the idea of ​​making it that can rotate its joints with a 360 angle and can bend its limbs in any direction. Sort of like owl's 270 ...
5
votes
1answer
93 views

Feasibility of an amoeba sea

Humanity has discovered entire worlds filled with creatures that would question their understanding of biology, but one creature, if it can be called, has brought up many many questions. Appearance ...
3
votes
2answers
93 views

Feasibility of a tree with a circulatory system

I recently look at a question on this site that questioned if a “world tree” is feasible, Would a 'World Tree' be feasible in real life?. If i remember correctly, it stated that one way to ...
2
votes
2answers
98 views

Could the Dobhar Chú exist?

Residing in Ireland, the Dobhar Chú is a creature of Irish folklore being depicted as: being carnivorous resembling an Otter being 7 ft long residing in lakes (optional) hunting in pairs (optional) ...
4
votes
2answers
109 views

Could bipedal humanoids evolve from bears?

I'm wondering whether it would be possible for humanoids to evolve from bears. bears share many characteristics with primates such as being amazing tree climbers and having the ability to use tools. ...
4
votes
2answers
104 views

How to construct an Earth-like world with very high wind speeds

I want to create a world where humans can live outside (perhaps with some protective clothing) but where very high winds exist in almost all potentially habitable areas making life outside impossible ...
2
votes
3answers
65 views

Ways to increase temperature and still be habitable by humans

I am designing a planet that humans can live on for a few tens of thousands of years, while they are hiding from some sort of inter-galactic police force (or whatever). Therefore, it's important that ...
6
votes
2answers
190 views

Possibility of creating a gun that can permanently paralyze a person?

I'm wondering whether it's possible to create a gun that shoots some kind of shock wave to permanently damage nerve cells and instantly immobilize a hostile target but leave them alive. Would such a ...
3
votes
2answers
116 views

Feasibility of a massive and nigh-permanent sandstorm?

In my military sci fi story in which a squad of private contractors have to contend with hostile creatures reliant on scent and mechanoreception to hunt, I wanted to keep the sci-fi 'hard' and ...
8
votes
3answers
154 views

What environmental factors would cause bipedalism underwater?

While reading this question about how non-primate mammals could develop a bipedal stance, I became curious about the broader reasons why animals could evolve to walk on two legs. I found some ...
2
votes
1answer
85 views

Anatomically correct cockatrice

In short summary A cockatrice is is essentially a a two legged dragon that has the head and body of a rooster, it also has a serpentine like tail and either has feather like wings or webbed like ...
3
votes
4answers
122 views

Feasibility of making a clone with the same identity

So you decide to clone yourself, obviously the clone is a infant, but other wise looks perfectly identical. However, you start to think of how your new clone could be perfectly like you, in body ...
6
votes
3answers
148 views

What would be the best way to capture a Wyvern?

Wyverns in a lot of ways are living weapons. They're huge (roughly the size of quetzalcoatlus), can fly, can support the weight of ONE unarmored human, and can breathe fire. Given these traits, it's ...
11
votes
3answers
189 views

Feasibility of humanoids that evolved from non-primate mammals?

I'm writing a fictional story where non-primate mammals (and marsupials) evolved into different species of humanoids which roamed the earth. In my world humanoids have evolved from animals such as ...
8
votes
4answers
147 views

Swallowing solids without a tongue?

As a thought project, I wanted to make an alien species that eats without any use of the tongue, but I've run into the problem that it's almost impossible to swallow solids without choking without the ...
1
vote
1answer
84 views

What would the view from a spaceship traveling through inter-galactic space look like?

My character is traveling aboard a spaceship through inter-galactic space (it has left the Milky Way). The ship is traveling at the speed of light or so and has been for the last six thousand years. ...
4
votes
2answers
145 views

Is it possible for the body to turn to ash upon death

Say you see a fellow human walking on the street, nothing special, nothing new, but suddenly, BLAM, they're dead. You reasonably run away from the scene out of fear, but when you look back, the body ...
0
votes
0answers
40 views

what type of enginnering would it be for creating/building fictional technology? [closed]

I'm trying to learn more about fictional science related stuff, but actually learning it and trying to create it, but just can't find a word for it. Like if I want to learn how to create a portal, ...
1
vote
3answers
202 views

How long or how hard is it to develop a medieval fantasy into a modern or even sci-fi civilization.?

Our universe dies due to entropy, so what do humans do best??? COLONIZE! A near sentient AI found a way to cross realities and because our universe was dead, everyone took the chance. They (about ...
1
vote
3answers
85 views

whats the highest a group of Yetis live?

A long time ago a group of proto-giants moved high up into a the Sodo-Himalayas. Yetis commonly live up on high mountain plains some of basic characteristics of Yetis are: are as intelligent as ...
2
votes
4answers
170 views

Are (near) instant data transfers feasible on an intergalactic scale?

Inspired partially by this comment on one of my answers, I got to thinking on what the quickest way to communicate would be on an intergalactic scale. Say humans have colonised the galaxy, and use ...

1 2 3 4 5 120