Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [biology]

For questions about living things. Does not exclude aliens, but additional information is usually necessary (consider using "xenobiology" instead).

2
votes
0answers
41 views

Bacteria Producing Ultraviolet Light [closed]

I have species of bacteria that produce ultraviolet light serving as the basis for an underground ecosystem. What are possible food sources for this bacteria that are growing on the cave ceiling, ...
17
votes
6answers
1k views

If people had hollow bones to enable flight how would you design armour to protect them?

A race in my novel have hollow bones to allow for flight. The character that belongs to this race is a warrior. It would be very easy to break bones simply by punching a fighter of this race. Is there ...
6
votes
6answers
267 views

How could a species that breathes through its skin develop spoken language?

I've been working on a fantasy race recently of sentient bipedal salamanders (sorta) and was talking with a friend about them until one of us realised that since they're amphibians they would breathe ...
5
votes
3answers
113 views

emergency spacesuits

I know a similar question was asked whether gas masks could be used to survive in space but it didn't quite focus on the parts I'm interested in. I'm building a world in which space travel is regular ...
2
votes
3answers
148 views

Can tribal humans survive in a world with dinosaurs [closed]

So I want to write a novel set in a primal world with Dinosaurs. The humans live in tribes with stone tools. Unfortunately, I am not sure if they can survive at all in such a setting. is it possible ...
3
votes
4answers
313 views

One finger, one thumb, one arm, one leg, one nod of the head

One finger, one thumb, one arm, one leg, one nod of the head, sit down, stand up, keep moving We'll all be merry and bright https://www.kididdles.com/lyrics/o113.html I want a creature that ...
24
votes
8answers
8k views

What would happen to a human body subjected to extreme water pressure?

First of all, I tried to look if this wasn't answered before. Found this and this but neither is exactly what I need. Some Context There's this race of humanoid fish people. They live in cities ...
9
votes
2answers
602 views

The running-backwards Olympics

In a future world that is obsessed by not repeating the so-called errors of their fathers, there is a backwards Olympics, or Scipmylo. All the usual disciplines are featured in reverse where it is ...
7
votes
5answers
306 views

Barring all structural and stability issues, how would building a ringworld around the earth affect it?

I've looked for an answer for this, but the only information I could find dealt with the ring itself. All I want to know is what would change on the Earth if all problems were solved and the ring were ...
2
votes
4answers
72 views

What are the long term effects of increased neurotransmitters? [closed]

In my story, one of the main characters (Joe) has been born with a somewhat superpower: Any person near him will have elevated neurotransmitter levels. If their brain is releasing happy ...
0
votes
3answers
101 views

What if peregrine falcons, albatross, and hummingbirds were all human-sized? [duplicate]

If peregrine falcons, albatross, and hummingbirds were all human-sized, but possessing their current biologies, would each of them still be able to fly as they normally would?
0
votes
1answer
155 views

Worms that create wormholes - can we find and track them underground?

In a future Earth it has been discovered that earthworms can actually create wormholes. There is a lot more to this and I will be asking other questions, however at this point I just want to know if ...
10
votes
5answers
988 views

Dragon shapeshifting and memory mechanism

Dragons are biologically immortal creatures that have evolved the most versatile sexual reproduction in existence, they can morph through a cocoon into any other species from the animal kingdom that ...
14
votes
3answers
2k views

Plastic and oil eating microbes apocalypse part 1 - How fast can they spread?

Plastic is a huge problem in our lives. One of the ideas is to engineer plastic eating bacteria or fungi. Experiments already begun, and accidents already happen: a team of international scientists ...
3
votes
6answers
469 views

Can one individual be used to repopulate an entire species?

An evil scientist has engineered a plague that would kill anyone with an xy chromosome pair. This plague has systemicatically spread throughout the planet, killing all males within the population. All ...
6
votes
6answers
297 views

Pros and cons of hermaphroditic vs sexual species?

Between a species that is hermaphroditic and a species that has males and females, then what would be the pros and cons of either one from a biological standpoint? Anything not regarding the biology ...
4
votes
1answer
67 views

Visual Cortex, superficial Brain Implant - Biological feasibility

In another question Everybody has a brain implant. What measures can a criminal take to escape justice? I assumed that a brain implant would be possible in the future for surveillance. In this ...
25
votes
7answers
5k views

Is intraspecies genetic incompatibility possible?

I'm creating a humanoid species, roughly based on humans. The difference is that not every opposite sex couple of fertile age could produce offspring. The premise of my story is based of some men ...
0
votes
3answers
118 views

Can you tell me which are the things or the group of the things that the character of my story can use to paralyze his elder brother? [closed]

I am writing a fiction story. In that story, a man paralyzes his elder brother by lacing one of his food items, for example, milk or any other thing which he eats with a "thing" or a group of the "...
2
votes
0answers
115 views

What is the relationship between surface gravity and maximum animal size? [closed]

It is clear that an organism can only grow so large before the systems required to keep it alive need to become impossibly efficient. Circulatory systems, respiratory systems, nervous systems, etc. ...
4
votes
5answers
222 views

Rock crushing hands, how to make it possible?

A species of humanoid creatures with a strange skull structure and huge horns has somehow immense strength in their hands. The rest of their body seems to be strong in proportion to their weight and ...
3
votes
3answers
174 views

Best natural armor possible for a fantasy humanoid

In my fantasy world a scholar magician creates a sub-specie of warriors with an optimal natural armor against medieval technology weapons. What would it be like? How can I make it as flexible as a ...
0
votes
4answers
153 views

How can a radioactive planet kill most fetuses in utero, but not give everyone cancer?

My setting takes place on a planet that has a very high level of radiation because of reasons unknown to the population. This factor or group of factors are not man-made, but due to some change in ...
9
votes
8answers
1k views

How would a sapient species descended from felids become herbivorous?

In my fantasy world, I have created a sentient species descended from an arboreal felid (it evolved to eat squrriels and small monkeys). They are my elves. The one problem is that I want them to be ...
3
votes
2answers
183 views

Anatomically Correct Space Whales? [duplicate]

In my book series, I want space whales to be a thing. However, I want to have some kind of at least pseudo-scientific explanation for their existence. What I need to know is: -How do they breathe in ...
0
votes
5answers
244 views

Is it possible that a species be intelligent and keep their animalistic trait?

As we all know, the brain consumes a lot of energy, so much that we, who has a bigger body and brain only have the same amount of strength as a chimpanzee. So, could a species evolve to develop ...
7
votes
3answers
132 views

Is it possible for an organic species to generate a steady magnetic field?

There are some organisms that can generate electricity (eels, for example). And some others can detect magnetic fields and use it for navigation (birds, for example): https://www.nytimes.com/2012/04/...
8
votes
2answers
169 views

Security against “truth serum” by means of a drug poisonous in combination with sodium thiopental

The secret police of my fictional country (unoriginally) uses sodium thiopental in medical interrogations, usually in combination with various forms of physical torture. An antagonist (a courier of ...
2
votes
0answers
123 views

How can there be endangered humanoid species? [closed]

In my urban fantasy, I have several human species that coexist with humans. I'd imagine some like species such as who're classified as Faeries have a stronghold to have intercommunication with humans. ...
6
votes
3answers
561 views

Why would unicorns only let virgins ride them, and bicorns refuse to let virgins ride them? [closed]

How to explain the fact that unicorns only let virgins ride them? Why does the unicorn even care if the rider is a virgin or not? And why do bicorns do exactly the opposite? Bicorns won't let ...
5
votes
9answers
1k views

What biological trait could make a humanoid species more likely to be matriarchal, but keep reproductive compatibility with other humanoids?

The original idea was a race of matriarchal desert nomads, but most desert nomad societies I could find as inspiration were strongly patriarchal. I can change this aspect if I don't find a way to ...
1
vote
2answers
142 views

How to breed war elephants?

Let's imagine following scenario: Human society, mostly possessing technology on level of continental Europe, around year 1000 AD ("High Medieval Period"). There are rare, but not unknown, ...
-2
votes
5answers
138 views

What skin colours would highly adaptable, hunter humanoids naturally evolve?

In the new setting I'm making, I found an opportunity to make a species of humanoids that I simply couldn't resist. So I got to work, making the tribal herdsmen and hunters of the predominantly ...
0
votes
2answers
128 views

What is the most pratical/feasible method to replace the human digestion apparatus?

Objective: Replace the human digestion apparatus (stomach, guts etc) From my basic understanding the human body needs food, because it needs ATP (energy unit, some kind of sugar(?)) or you could say ...
24
votes
12answers
7k views

Is it possible to get permanently scarred by the sea?

My story takes place in an archipelagus in world X, inhabited by people X. In the shores of the capital city of that archipelagus, there is a bay of deep, dark waters. It's supposed to be dark and ...
-2
votes
1answer
118 views

Seeing only in IR: Is my hypothesis correct? [closed]

I watched Kyle's Because Science video on The Predator and 1 thing he talked about was IR vision. Here was his argument: If you can see nothing but infrared light, you can only see the ambient ...
11
votes
2answers
302 views

Weather in a 5 mile deep crater

I’ve done a fair bit of research to come up with this scenario. I hope it’s not “too broad” to ask for a reality check. Have I overlooked anything? Does it all sound plausible? My world takes place ...
19
votes
7answers
3k views

Aquatic aliens and the effects of acceleration in space-flight

A sentient species of water-dwelling aliens achieve space-flight. Their living quarters contain water [no free gases]. They have evolved over millions of years to regulate their buoyancy at will. ...
2
votes
3answers
2k views

Is it possible to survive just by absorbing food and water through your skin? Part 1

The outer layer of skin of a human is called the epidermis. It is supposed to be waterproof, however: Using any current science and substances, would it be possible for humans to survive for two ...
6
votes
3answers
242 views

Could a creature like the brethren moons exist in reality?

I recently came across a game called dead space and a certain main antagonist species inside of the game. In this game you play as the main character who is trying to protect humanity from sentient ...
0
votes
1answer
93 views

Would structural colouring work for making hair green, blue and or grey?

Today I was thinking about how to make an elf who naturally grows blue hair. Thinking about this I came up with the idea of coloring the hair using microscopic eyes like with blue, green and gray eyes ...
0
votes
5answers
505 views

Anatomically correct succubus part 2: the diet

Instead of the whole egg laying parasitic vagina concept, which was the leading idea in the original question. Assuming the succubus is purely the whole woman like creature. Can she gain enough ...
1
vote
7answers
435 views

Noah fails his mission - what would Earth look like today and in the far future? [closed]

Assume that everything in the Bible is true up to the point when Noah built his ark and the flood came. This happened in 2348 BCE. Unfortunately the Ark was badly designed and sank almost ...
7
votes
10answers
3k views

How can I create a mechanism for ejaculatory control in males?

Ejaculation is the discharge of semen from the male reproductory tract, usually accompanied by orgasm. It is the final stage and natural objective of male sexual stimulation, and an essential ...
22
votes
7answers
2k views

An animal that is physically separated into multiple parts

One of my fictional planets (which is largely terran in nature) is notable for an unique animal. Said animal is a dangerous predator that is notable for several things: It is physically separated ...
7
votes
4answers
257 views

How is infra-vision any good?

Supposing a world like the Underdark, full of civilizations that developed and live their lives completely away from the light of the sun. In the typical D&D type setting, these creatures have ...
14
votes
9answers
5k views

How can I prevent a human sacrifice from dying before a ritual is complete?

This setting takes place with medieval level technolpgy. Upon death, all souls leave the body and go directly to God to become one with its consciousness. However, there are other competing gods who ...
37
votes
23answers
12k views

Make slimes great again, but how?

Slimes are seen as merely base-level enemies which don't really challenge the heroic main character, the Chosen One. My question is how to make slimes incredibly powerful without using magic. They ...
3
votes
1answer
156 views

Does the body keep growing or maturing in any way past adulthood?

(Edited for clarification) The general popular conception of how aging works is that your body grows and develops, reaching completion at some point in your late twenties or early thirties, and then ...
14
votes
14answers
7k views

How would aliens test humans for empathy?

500,000 people have been kidnapped from all over the world by aliens. The aliens want to see if humans have empathy, and they can't understand our languages, as we speak they hear just random noises ...