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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
2answers
99 views

What's the disease?

In a near-future sci-fi world, I described a disease with the following characteristics: Affects human female children (not necessarily exclusively). Is a neurodegenerative or similar disorder, ...
4
votes
2answers
160 views

Is acid blood possible?

I'm designing an alien species, whose blood is highly acidic and can easily cause someone's hand to melt down. It's pretty similar to the Xenomorphs from Ridley Scott's Alien, except for the color ...
4
votes
4answers
91 views

How big could a land-dwelling arthropod get if it wasn’t limited by oxygen consumption?

Insects and other land-based Arthropoda are stuck at the size they are due to how inefficient their respiratory system is. They were able to reach the size they did in the Carboniferous period because ...
19
votes
8answers
2k views

What could be the physiological mechanism for a biological Geiger counter?

Some humans have been genetically engineered to be able to detect ionizing radiation to better survive the harsh environments found outside of earth's protective magnetosphere. What could be the ...
26
votes
16answers
5k views

How can I prevent hyper evolved versions of regular creatures from wiping out their cousins?

The world is covered in mana, the life force that flows through all things. In certain places, this mana saturates to high levels. This affects the animals living in those areas, who absorb the high ...
34
votes
20answers
13k views

Should immortal women have periods?

Mod Note: Some people may be squeamish about this subject, please keep all responses clinical rather than vulgar. So, in my world, I try to play the "immortality" trope with twists that make it ...
5
votes
6answers
397 views

Is plausible to have subspecies with & without separate sexes?

I'm creating humanoid specie with two subspecies Hairy races - roughly based on humans, chiss, mirialans, with standard males & females sexes Tentacle races- roughly based on asari, twilek, ...
6
votes
4answers
213 views

How can sex lead to a boost in performance for competitive sports?

Many believe that sex before a competition can have a negative impact on performance in combat, speed and strength sports in males. Athletes from strength and speed sports showed decreased performance ...
41
votes
12answers
10k views

Is there an evolutionary advantage to having two heads?

This is a classic of fantasy/sci-fi stories. A creature with two heads, two brains, two distinct personalities, sharing a single body. An entire race of Siamese twins. But the question is, what ...
0
votes
0answers
108 views

Could Synthetic biology in the future be used to create a race of artificial women who would all have Androgen Insensitivity Syndrome? [on hold]

I would like to create a sci- fi stuff and I would focus on artificial people create by artificial genome in lab. One of such sub races would be an all female race that would have CAIS(Complete ...
5
votes
3answers
145 views

Could the Amazon's jungle exist in a continent without the Andes mountain chain?

I assume a planet like earth. Obviously the Amazon river is fed into the Andes mountains as well as other rivers that give water to the system. Could the same amount of water come from a specific ...
-1
votes
0answers
57 views

A widespread epidemic occurs that only allows our reptilian brain to function, would society collapse? [on hold]

Writing a story where a rogue cybernetics company hacks our minds via AR contact lenses and causes mass hysteria. If they were able to hack people down to their reptilian brains only, what would be ...
3
votes
2answers
199 views

Anatomically Correct Ego Sword

I'm reading a comic set in a really unique fantasy game. One of the creatures that really caught my attention were a type of slime/sword called ego sword. In their normal form they're a blob but can ...
5
votes
6answers
256 views

How can I prevent the creation of fruit-salad chimeras?

A Chimera is a creature made up of two different animals that are fused together in a process known as polymerization. This spell can combine animals to create an entirely new animal which contains ...
-1
votes
1answer
84 views

What would be the best genetic traits for a plausible bodyguard/enforcer? [closed]

I am writing a story centered around a very powerful alchemist whose speciality is genetic manipulation. He is a very hated and wanted man for obvious reasons, but he has one daughter who loves and ...
24
votes
11answers
4k views

Why is long-term living in Almost-Earth causing severe health problems?

The people of Magical Almost-Earth needed the Chosen One to be brought from our world. Now that the day has been saved, Chosen One would have liked to stay, marry some royal sibling and enjoy life in ...
81
votes
19answers
18k views

Would a 'World Tree' be feasible in real life?

A livescience.com article claims that trees can reach a theoretical height of 400 to 426 feet (122 to 130m). This is due to the tree being unable to carry water up to the top at that certain point due ...
3
votes
1answer
568 views

Is bio-luminescence possible in aquatic mammals?

Could a species of aquatic mammals develop bio-luminescence? What kind of bio-luminescence would it be? What circumstances could lead to it?
16
votes
6answers
3k views

What would be the tallest possible height for humanlike creatures in earthlike conditions?

This is about "giants" inhabiting a fictional earth-like planet somewhere in the Universe (like those in the movie Prometheus, for example). Assuming that all the conditions (temperature, gravity, ...
8
votes
6answers
818 views

What would prevent chimeras from reproducing with each other?

There exists a polymerization spell that allows distinct animals to combine with each other, creating an entirely new creature. The beasts in question are held in transumutation circles linked by ley ...
8
votes
3answers
204 views

Could a life form evolve an organ for generating temperatures less than a degree Kelvin above absolute zero?

I was thinking of a life form with a similar surface temperature to Earth, as well as a similar temperature variation to that of Earth. Could such a life form evolve an organ for generating ...
6
votes
2answers
149 views

How much blood and/or platelets can a human give to their vampire overlord each day and still be healthy?

This is based on the idea of a society where vampires are known and subsist off of 'willingly' given human blood. An average adult human needs approximately 2000 calories a day to maintain their ...
6
votes
7answers
4k views

How could a mummy come back to life?

What conditions would have to happen to re-animate a mummified person to come back to life with consciousness fully restored? What would the conditions of the mummification be and biological/technical ...
4
votes
2answers
104 views

If oxygen is extracted from blood, would the process cause any hormones within it to be extracted as well? [closed]

Let's say oxygen is continuously being extracted from the blood of a Giant Pacific, 1-and-a-third years old octopus and will be injected into a human using a process similar to this: https://www....
8
votes
2answers
197 views

Adaptation to high $\mathsf {CO}_2$ concentration

If humans were to live in an earth-like planet with an atmosphere with a significantly higher concentration of $\mathsf {CO}_2$ (Higher than what can be tolerated by normal human for a long period of ...
5
votes
7answers
446 views

How can I avoid the problems of incest without expanding the gene pool?

The demigods of this world are avatars of the one true God known as Dea and built in the image of humanity. They are independent and have their own opinions from each other, but are connected by a ...
12
votes
8answers
1k views

How could a possessed body begin to rot and decay while it is still alive?

Qui-Gon Jinn has finally realized he is an idiot and that everything is his fault. Everything that has happened (fall of the old Jedi order, rise of the empire, the rebellion, the First Order, etc.) ...
3
votes
6answers
149 views

What evolutionary conditions lead to intelligent life? [closed]

I was wondering if intelligent life, in the sense that the species' greatest evolutionary advantage is its' intelligence, is an evolutionary inevitability, or was it a completely random occurrence for ...
13
votes
5answers
3k views

Are “living” organ banks practical?

I was inspired by Dead Space which had cloned organ banks for transplants due to mining accidents. I honestly found this idea intriguing so what I'm wondering would it be practical or do better ...
29
votes
16answers
10k views

Would evolution happen the same exact way if Earth restarted?

If Earth instantaneously reverted back to when the only organisms were small microscopic creatures in the sea, would evolution happen the same exact way creating the same animals and species? Was ...
53
votes
12answers
7k 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 ...
27
votes
7answers
4k views

If a person had control of every single cell of their body, would they be able to transform into another creature?

If a person had control over each and every single cell in his body, I.e: Cell growth Cell multiplication Shape and form of cells How cells bond/bind with each other Cell Function Would they be able ...
5
votes
1answer
142 views

No iron for your fair-folk maiden? (Part 4: Silver)

Part 1 No Iron for your fair-folk maiden? (Part 1) Part 2 No iron for your fair-folk maiden? (Part 2) Part 3 No iron for your fair-folk maiden? (Part 3) Only two parts left to go! Now my fair folk ...
3
votes
2answers
128 views

No iron for your fair-folk maiden? (Part 3: Iron)

Part 1 can be found here No Iron for your fair-folk maiden? (Part 1) And part 2 can be found here No iron for your fair-folk maiden? (Part 2) So, my not so metal inclined Fair-folk are encountering ...
5
votes
1answer
83 views

No iron for your fair-folk maiden? (Part 2: Radioactive metals)

For reference, here is part 1 No Iron for your fair-folk maiden? (Part 1) A brief recap. My fair-folk are weak to all metals, but each metal has their own specific effects. The last question resulted ...
6
votes
3answers
445 views

No Iron for your fair-folk maiden? (Part 1: alkaline)

Excuse the broad question but I couldn’t resist making a metal pun. So in my universe the Fair Folk encompass a large group of creatures. They live in their own little pocket universe, in which ...
8
votes
6answers
2k views

What environment would goblins be best adapted for?

Goblins in my setting are around four feet tall, with batlike ears, a keen sense of smell, and lithe, dexterous bodies. They are omnivores, eating slightly more meat than the average human, and their ...
1
vote
0answers
63 views

what effect if the world have a single massive world giant tree? [closed]

you know stuff like ygdrasil tree but just a normal tree but the biggest and tallest in the world, i wonder what the effect to the world ? for an example if the root grow to surpass the continental ...
17
votes
5answers
3k views

A 'vampire' who still eats normal food

The hero of my story has been cursed to be forever 'bloodthirsty' in the literal sense of the word. Effectively, he has been turned into a vampire. But drinking blood will cause him to lose his senses,...
7
votes
1answer
102 views

Developing a scientifically accurate species of dragon-like humanoids

I'm trying to figure out a way to make this species as I envision it while still maintaining scientific realism. I want to get it as close to "yes, this could exist in the real universe" as possible. ...
9
votes
4answers
227 views

How to keep the brain alive?

So, let’s say Bill wants to gain immortality. Bill is a billionaire, and so invests a large portion of his estate to Brain Transplant research. After a bit, the doctors vivisect him, and encase his ...
9
votes
14answers
3k views

Natural Armour and Weapons

In my fantasy world, the magic system pretty much makes metal armour and weapons obsolete. The magic system's specifics aren't important, just note that the magic system allows the users to 'penetrate'...
5
votes
2answers
139 views

Seasonal Shade-Plant

There is a forest in my world with a special property: All the trees are optimised to shade as much as possible during summer and give as little shadow as possible during winter, to regulate the ...
1
vote
1answer
100 views

If Earth was one third it's size, and had 1/3rd it's current gravitational pull, how would life look? [closed]

So, to start off, I am not even sure if life would develop, because I am not clear on how the mass of the planet or gravitational pull affects chemical evolution, but assuming that life did start in ...
7
votes
7answers
232 views

Would intelligence affect the evolution of colorful display patters for attracting mates?

On another planet there is a group of organisms that have colorful display patterns allowing them to attract mates. Eventually a branch of this type of organism evolves the intelligence of early ...
33
votes
8answers
6k views

Of strange atmospheres - the survivable but unbreathable

Most gases that are toxic to breathe also do nasty things to the skin when they're in the atmosphere at dangerous concentrations - and one is walking around without sealed protective clothing; sulfur ...
9
votes
4answers
776 views

Is a reptile with diamond scales possible?

I thought of a concept for a dragon or similarly gigantic reptile with a special adaptation, in which they’re born with scales made almost entirely of carbon. Then, over an incredibly long life cycle, ...
5
votes
5answers
340 views

Making the God-Hand Make Sense

In my world an advanced alien civilization are worshiped as gods by the human population. As the gods have better things to do than actually spend time interacting with the local fauna they created a ...
10
votes
4answers
256 views

Membrane impermeable to $N_2$ but permeable to $CO_2$ and $O_2$?

I'm looking for a way to bypass the bidirectional diffusive gas exchange that happens in human alveoli, to allow aquanauts to breathe a standard Nitrogen-Oxygen air mix at very high pressures (up to ...
5
votes
8answers
2k views

How can I minimize the damage of an unstable nuclear reactor to the surrounding area?

Gods in this universe inhabit a higher plane of existence. Their spirits inhabit large, humanoid forms upwards of 30ft, and watch over humanity by protecting it from outside threats. On occasion, a ...