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Questions tagged [biology]

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

3
votes
4answers
203 views

Would storms on an ocean world harm the marine life?

On a habitable world completely covered in water, with no land above sea-level, there would presumably be storms of biblical proportions. Suppose this world has oceans so deep that the deeper layers ...
29
votes
5answers
6k views

Does living without access to sunlight for extended periods have known physical or psychological effects on humans?

Humans (even programmers :-) ) are used to having some access to natural light, but in a colony in space, on the dark side of a moon, or underground (for example) this won't happen. Are there known (...
14
votes
7answers
440 views

Will food logistics limit the population of a civilization of obligate carnivores with modern technology?

I'm imagining a world populated with a species of intelligent, social, and "modern" (in terms of technology) humanoids. For the purposes of this question, they and their world can be near identical ...
24
votes
4answers
3k views

What minimal radius is needed for rotation to simulate gravitation without averse effects on humans?

A quite common idea to provide "gravitation" in space stations is to make them rotate, so the centrifugal force gives an effective gravitation. A possible design is a ring-shaped space station. Now ...
7
votes
4answers
453 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 ...
46
votes
10answers
5k views

How can an organ that provides biological immortality be unable to regenerate?

After Cain killed his brother Abel, he was cursed by God to wander the earth forever. On his travels, he met a sympathetic woman named Lilith. They discovered that they had a mutual beef with their ...
0
votes
1answer
123 views

How can I modify the prostate to produce alternative fluids?

Semen is liquid that spurts out of the penis during orgasm. It is produced by the walnut-sized prostate gland that sits just below the bladder, and by the seminal vesicles, two pinky-sized glands that ...
23
votes
7answers
1k views

Plausibility of Giant Floating Whales

Ignoring the plausibility of their evolution and sources of food, could a whale-like creature which internally consists largely of hydrogen bladders/gasbags realistically stay aloft? If these ...
10
votes
4answers
571 views

What is the plausibility of a sentient starfish-like creature?

You all probably know what a starfish is. When a starfish is ripped in half, if each half has part of the central disk, then it can regrow into two starfish. Worms can do something similar, if they ...
8
votes
4answers
146 views

Retractable Tusks?

Is there a way to make retractable tusks anatomically plausible in a creature design without relying on an articulated bone structure? Basically, relying fully on musculature instead of articulation ...
1
vote
0answers
71 views

How could an amorphous species work? [on hold]

In the setting I'm building, then there are two lifeforms to have existed; Angel and Demons. Both are closely related, as speciation between happened rather recently in their history. They both also ...
4
votes
4answers
73 views

Anti-decomposition mechanisms?

Suppose that due to some kind of magical force I'll leave handwaved, (non-sapient) organisms are able to practice necromancy, reanimating their fallen peers as undead bodyguards. However, the magic ...
22
votes
3answers
3k views

What sort of beak would a bone marrow eating bird have?

My world is very earthlike and I am looking to create a bird that primarily eats bone marrow. I wanted my bird to crack the bones of the carcasses to eat the marrow inside. What would the ideal beak ...
22
votes
10answers
1k views

Fixed-Wing Biological Flyers?

How plausible are naturally-evolved, biological, fixed-wing flying creatures? Could such a creature plausibly evolve in Earth-like conditions? If so, what method would it be most likely to use for ...
6
votes
2answers
184 views

What is the science of fairy flight?

Assume these homo super-dwarf aka fairy and homo sapiens come from a common ancestor, and somehow they evolved a pair of wings and can do vertical takeoff. The average adult is approximately the ...
8
votes
3answers
239 views

Artificially make people incapable of singing at all (even poorly), but still capable of speaking?

Magic has recently become possible in my story, and singing is the mechanism by which humans use magic. A totalitarian regime wants citizens who can speak, but not sing in any way, even poorly. (That ...
14
votes
7answers
4k views

How would a creature produce and store Nitroglycerin?

This question began due to a certain fictional monster. Where it was stated to be able to secrete explosive goo activated by its saliva, which would coat its boulder-like arms and explode when smashed ...
6
votes
3answers
217 views

Effects of Explosive Decompression on the Human Body?

Many science fiction stories, movies, and shows involve characters undergoing explosive decompression, the technical term for a rapid drop in pressure, usually all the way to a vacuum. Frequently, ...
9
votes
4answers
182 views

What sort of animals would a civilization of small feline omnivore humanoids domesticate

I'm playing around with the idea of making a world heavily based on one of my favorite childhood book series. (basically a fanmade rewrite of sorts). The series is called Warriors, and is about ...
15
votes
6answers
5k views

How could a female member of a species produce eggs unto death?

As far as I am aware, female mammals cannot produce eggs (as in ova) after a certain age/maturation. How could the female produce eggs for an unlimited amount of time, resulting in a 'queen' mammal ...
47
votes
15answers
13k views

What injury would be of little consequence to a biped but terrible for a quadruped?

Let's imagine a group of people who can turn from human to wolf at will. Wolves are quadrupeds, and humans are biped, so I guess their weight is differently shared in their body, notably when they ...
23
votes
7answers
4k views

Physical correctness of trolls with high regeneration ability

In my fantasy world there's the race of trolls, vastly inspired by the ones one encounters in Baldur's Gate 2 (see here). Millennia ago, they've been driven underground by orcs and elves, as well as ...
13
votes
7answers
1k views

Where would a “Magic gland” go for full-body saturation of magic?

If there were some organ, akin to the liver or a gland (I'm blanking on organ functions right now), that produces magical energy to project through the body, its various vessels, and directly out of ...
12
votes
3answers
947 views

How can a demon take control of a human body during REM sleep?

I have a friend who is a really nice guy. The problem is that he was born as a half demon. While he looks completely normal, he possesses a spirit inside him called "Amon". This being forces him to ...
0
votes
2answers
197 views

Can my Alien species be possible with real science?

They are blue to gray skinned with four eyes, two of which can see in infrared, three fingers and toes on each appendage, and reptilian-like ears (eardrums are external), as well as a hair color range ...
5
votes
7answers
282 views

How to Extend Female Fertility Period without Altering Current Pubescent Timing?

I would like to use CRISPr Cas9 technology to extend the life expectancy of my fictional civilizations. From what I understand, CRISPr could extend life by lengthening telomeres and improve quality of ...
23
votes
9answers
3k views

How advanced or effective weapons can be created from mostly animal body parts?

I have a race of carnivorous mammals living in a very resource-poor environment. Due to a mixture of lack of resources (no metal, no wood or tough stems, etc) and cultural taboos, they are only ...
9
votes
4answers
430 views

What Would the Third Kind of Angiosperm Look Like?

To put this title into context, there are actually two basic kinds of angiosperms on Earth, showing here: These differences in characteristics serve their own adaptations to survive and thrive. Now ...
1
vote
6answers
174 views

How can a terrorist cult genetically engineer human bombs?

A nihilistic organization founded by a preacher, Solf J. Kimblee, has reasoned that human beings have fallen short of God's true purpose. Since the betrayal by Adam and Eve, all people are born with ...
0
votes
1answer
143 views

Could another species overtake us technologically? [closed]

Is it possible for another of Earth's species to catch up and overtake us technologically over the next million years or so? Assuming we survive that long as a species and our technology stagnates ...
1
vote
1answer
138 views

I Need Help With Human Degenerative Disease (HDD) [closed]

I am currently working on a post-apocalyptic world where roughly 90% of humanity get infected by HDD (Human Degenerative Disease). HDD causes the human brain, glands and tissues to change quite ...
4
votes
2answers
1k views

Dragon taxonomy

I am trying to taxonomize different species of dragons i made up, but am struggling finding correct phylum's and orders and stuff like that, would i have to make a whole new phylum for my dragons? Or ...
9
votes
1answer
398 views

Cracking Knuckles in Zero Gravity [on hold]

Cracking knuckles has something to do with air bubbles, but would it work in the same way if there is no gravity? If not, how would it be different? Would there still be a popping sound and/or ...
4
votes
3answers
128 views

Performance enhancing drugs (mostly realistic)

I have a character in my story who is immortal and heals very quickly (think Wolverine). Ignoring physical side effects (but keeping in mind psychological ones) what sorts of drugs could he take to ...
11
votes
5answers
954 views

What would be the consequences of overusing a magic system that consumes energy from human metabolism?

For my world, I wanted to create a reasonable and consistent magic system. Well, since I'm not a fantasy type, the result was something people should concentrate on, in which, the resource ("mana") is ...
3
votes
1answer
111 views

Could a human grow up larger by manipulating their endocrine system?

In my world there are a group of female warriors with an unusual ability: the resources of their bodies are fungible. For instance, they can make the muscles in one part of their bodies stronger at ...
6
votes
2answers
365 views

How long would gestation period be for dwarfs?

Dwarfs are intelligent creatures, with stronger bones and muscles but smaller than humans. They live mostly under ground (caves, mines, etc.) and reproduce sexually. How long the gestation period ...
6
votes
1answer
241 views

Eating one whale every three thousand days?

My current ongoing project, about which I've asked many questions, is about a world in which evolutionarily plausible legendary and folkloric creatures roam the Earth. One such creature is the sea ...
0
votes
4answers
2k views

How could a human be corrupted into a demon?

In many stories, the transformation of human to demon has been interesting to think about. This of course extends to mythology: In multiple folklore, it's said that Lilith became a demon of her own ...
4
votes
6answers
168 views

How can a terrorist group link a biological plague to a specific genetic signature?

A domestic terrorist organization has come to light due to recent terror attacks that they claim responsibility for. This group has developed a biological weaponized plague that attacks the nervous ...
16
votes
15answers
3k views

What are the exceptions to Natural Selection? [duplicate]

Consider a population where a low percentage of people (5%) posess a genetic advantage over the rest. In my fictional world, let’s assume this small percent of the population can wield magic while ...
2
votes
5answers
591 views

How powerful is selective breeding?

Given there is no other species that can do the job better. How much can you change a species to fulfill a specific task. The evolution of horses was pretty extreme from what I remember. Are those ...
-5
votes
1answer
99 views

Can more exercise alter human genes? [closed]

I want to know if exercise can change genes or not, if yes then what is process behind it and is it permanent or temporarily.
10
votes
11answers
2k views

Alien invasion to probe us, why? [closed]

In popular culture on my Earth-like planet, alien-abduction stories, anal probing and conspiracy-theories are well-known but largely considered by mainstream culture to be delusions or fanciful ideas ...
5
votes
4answers
174 views

Why would a demigod born to a goddess not be immortal? [closed]

In this alternate world, demigods were human beings which gained divinity from a divine parent. A male deity would knock up a mortal woman, who would carry the child to term. This demigod would share ...
9
votes
8answers
2k views

Why are all my replica super soldiers young adults or old teenagers?

So, I was working on my setting when I thought, "if I'm going for maximum JRPG feeling, I need several teenager protagonists, who somehow still stand a chance against the armies of Darkness." ...
28
votes
13answers
6k views

Plausible reason for gold-digging ant

Medieval bestiaries describe a creature, a type of desert-dwelling ant that digs for gold. It was also said to be the size of a fox, but I'll ignore that in this question. Why would ants unearth ...
35
votes
9answers
5k views

What species should be used for storage of human minds?

The business of mind storage became a profitable one, after the discovery of a magical process that allows the memories and personality of a living being to be transferred into another body. ...
5
votes
9answers
749 views

Why can't different runes that enhance the human body be used together? [closed]

Runes are used to enhance the human body's capabilities. They are inscribed onto the skin with through a ritual and work by the individual accessing the mana inside themselves. This mana is forced ...
21
votes
17answers
7k views

Would life expectancy increase if we replaced healthy organs with artificial ones?

Can we increase life expectancy by replacing important organs for life such as the heart, kidneys, young blood, etc. (but not the brain)? Most organs can fail and, for the ones which we already have ...