Questions tagged [biology]

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

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3 answers
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Anatomically Correct Elves

This is a submission for the Anatomically Correct Series. Elves are a supernatural creature from Germanic creature. Their appearances and abilities vary a lot in fiction and mythology but things they ...
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2 votes
1 answer
69 views

Anatomically correct Sandworms

This is a submission for the Anatomically Correct Series. Sandworms are a famous creature in fiction and mythology. Various mythological creatures are the Mongolian Death Worm and the Lambton Worm. ...
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  • 151
3 votes
1 answer
95 views

Dealing with extreme heat and pressure in an underground colony on Venus

A colony has been constructed by robots for human habitation deep under the surface of Venus. They are totally sealed off from the surface, and the galaxy beyond, and live like a ship in a bottle What ...
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8 votes
5 answers
2k views

Disease that rapidly kills and replaces cells - severity of symptoms

I have conceptualized a disease that rapidly kills cells in the human body and replaces them with modified copies over a period of 7-10 days. After this time, every cell in the infected person's body ...
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6 votes
5 answers
272 views

Anatomically Correct Asian Dragons

This is a submission for the Anatomically Correct Series. In the culture of China and other East Asian countries, dragons are legendary creatures that resemble snakes with 4 legs. They are big and ...
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  • 151
8 votes
3 answers
765 views

Hypothetically, can early humans have an alliance with giant ants? Maybe even assist them in the agricultural revolution?

Any ant-keeping geeks out there? I know what it's like to keep ants and they are quite fascinating, I was wondering if there were giant ants (their gigantism is due to high O2 levels) could they be ...
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  • 93
1 vote
1 answer
99 views

Can giant bugs and humanoids be in the same place at the same time?

There's definitely a rise in oxygen but humans might be poisoned by O2 so I thought of the increase being a gradual change and both invertebrates and humans evolve the necessary respiratory systems. I'...
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  • 93
12 votes
11 answers
2k views

How could a creature make its feathers or hairs glow?

The Context In the world I am designing there are creatures known as a Dazzling Griffin. These griffins act in a similar manner to some birds of paradise when mating, putting on elaborate displays ...
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3 votes
0 answers
97 views

Altering the muscles of giant creatures to let them stand without collapsing by changing their proteins

One of the problems with scaling up creatures without increasing their proportions is that their muscles won't be strong enough to support their weight due to the square-cube law, which I'm sure you'...
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6 votes
7 answers
1k views

Is there a scavenger or carrion feeder (Or anything associated with death) that's actually BAD for the environment?

I'm designing a dualistic pair of factions of post-apocalyptic scrappers with views based on opposing concepts of scavenging; renewal, re-use, and removal of hazards versus thievery, opportunism, and ...
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  • 143
11 votes
6 answers
2k views

What are the maximum and minimum day-night cycle lengths humans can adapt to?

On habitable planets, rotational period can be assumed to vary significantly. What are the limits of human adaptation to these different conditions while maintaining a normal sleep schedule? The ...
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  • 147
-2 votes
1 answer
62 views

Idea for rapid healing? [closed]

I'll keep this a short as I can. For a biological worldbuilding exercise where humans possess far greater biological abilities. I imagined a pancreas-sized organ that contained a huge reserve cache of ...
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8 votes
8 answers
2k views

Idea for a more "efficient" brain?

So if my incredibly basic understanding of how brains across animal species work is that the brain is compartmentalised into a bunch of different sectors that handle things like sight, language, fight ...
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3 votes
2 answers
81 views

What kind of creature would be able to provide nutrients to my floating plant mat?

My ocean biome is almost entirely covered by a mat of linked free-floating plants. You can read further details on my original question "What challenges must oceanic plant life overcome in order ...
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2 votes
2 answers
113 views

Can an organism have body structure materials that crumble upon being injured?

I'm working on building a species of wild animal, and I have several criteria in mind, and I'm looking for any glaring issues I may have missed that makes such a creature entirely infeasible ...
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  • 4,055
2 votes
4 answers
142 views

How to remove or greatly reduce the effects of menopause?

The reason menopause lead to hot flashes, vagina atrophy, osteoporosis, lose of muscle strength, brain fog, great memory and concentration loss, ect. Is because estrogen production is greatly ...
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1 vote
2 answers
52 views

A planet in which Natural elements , emits heat energy - Is Inhabitable?

On my alien planet, many natural elements (Soil, some plants, a certain type of stones...) emit a kind of heat energy. Will this affect flora and fauna of my planet? Since the natural elements emit ...
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  • 347
17 votes
7 answers
3k views

What challenges must oceanic plant life overcome in order to create a mat on top of the ocean?

The ocean of my very earth-like planet is covered in its entirety by vegetation, forming a kind of carpet on top of the water's surface. This free-floating halophyte is a superorganism formed by ...
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3 votes
2 answers
130 views

biochemistry of a silicon based sulfuric acid planet?

Im thinking about starting a speculative evolution project about this becauze i really like the idea of exotic biochemistry, ive looked at a few other posts and i have the gases that are breathed and ...
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19 votes
6 answers
6k views

Cold-blooded intelligent race: Is it possible?

I need my race to be highly affected by climate and nature changes. And they are more like a reptile - Humanoid. So making them Cold blood seems good for me. But they are an intelligent race too. They ...
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14 votes
11 answers
2k views

How could an organism reach escape velocity using only biological means?

The species in question that can survive in the vacuum of space for extended periods of time (say months). They can feed on stellar radiation and have an innate sense of orbital dynamics. They come ...
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2 votes
2 answers
142 views

Is it possible to have a planet where most of the sexually reproducing organisms are monoecious?

Creatures on Earth has 2 modes of reproduction, sexual and asexual. Most species employ only one of the two strategies, but a handful use both. Those that engage in sexual reproduction are either ...
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  • 499
3 votes
2 answers
672 views

How thin theoretically would a cut (with energy or matter) need to be to not be perceived by the human nerves/brain?

In this specific setting, it would be a speculative sci-fi thing, but this matter in specific isn't central to the plot. The idea is that the time that it takes for a person to recover from a ...
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  • 163
4 votes
1 answer
450 views

My creature's cells mix water and some of the stuff in pee to cool themselves. How does it get that stuff to its cells?

After reevaluating the creature that cools its blood with lye and sal ammoniac, I removed the middleman - the cooling chamber and use of blood as coolant - and replaced the potassium hydroxide/...
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2 votes
2 answers
262 views

Could cells use punch cards instead of DNA? [closed]

DNA molecules are made of nucleotides, these nucleotides have bases which connect A to T, C to G. These connections are made through hydrogen bonding. But what if instead of that, you have a long ...
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9 votes
4 answers
962 views

Is there space in an average animal cell that I could cram some extra organelles into?

From what I can tell, there's lots of room available inside a cell; certainly, all the graphic representations of them I can find seem to show that a lot of the volume of the cell is cytoplasm, as ...
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6 votes
2 answers
236 views

How Tall Can Flightless Birds Plausibly Get?

These flightless birds are under strong selective pressure to be able to feed on high up conifer needles, and avoid predation from T-Rex sized predatory flightless birds. The forests the birds are ...
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  • 2,041
2 votes
1 answer
154 views

What would a dead body look like after spending 20 minutes at 1500 PSI? [duplicate]

You always hear "crushed like a soda can," but I'm pretty sure that the body wouldn't be much smaller than normal. The person wouldn't be breathing, so nitrogen narcosis wouldn't be an issue....
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1 vote
0 answers
35 views

Under what conditions could organisms using a magnetic field (magnetotrophs) as an energy source evolve? [duplicate]

At the moment I am writing a scientifically based project in the genre of speculative biology dedicated to the description of unusual alien organisms, and in this case I was wondering under what ...
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10 votes
2 answers
743 views

Synthetic animal with super skin: Looking for Biotic material that's Elastic, hard to cut and puncture with force

Hey first post here!! I have a species of Synth-animal that is designed to upset ecosystems, consume all crops and livestock, and depopulate cities. The animal is around the size of an American black-...
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1 vote
2 answers
134 views

What about Photosynthesis which uses oxygen?

So for a project I'm working on I need plants which make the air around them toxic to Earth life. A way I had thought of to make this was to make the plants photynthesize with oxygen and release a gas ...
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3 votes
1 answer
187 views

How do I shield my calcium bio-electromagnet's wiring?

I'm attempting to design a creature whose internal anatomy includes a powerful electromagnet so that it can do things like pulling guns out of people's hands at close range. Like many electromagnets, ...
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3 votes
1 answer
154 views

Possibility of male lactation as a nutrition-dense source for pregnant women?

Men already have the components necessary for lactation, but they are underdeveloped, and women can breastfeed a baby while being completely flat-second hand experience with my aunt-since the factor ...
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0 votes
1 answer
117 views

Would a human with electric powers be able to use them to strengthen their muscles?

I heard that electrical stimulation can lead to a similar effect to working out, so I was wondering if someone who can create and finely control electricity would be able to increase their physical ...
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3 votes
2 answers
105 views

What does a creature with green skin look like with more/less melanin?

First off, the creature doesn’t have melanin, as melanin is (from what I can tell) a dark brown pigment. However, the word “melanin” gets my point across well, hence why it’s in the title. Let’s say ...
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9 votes
5 answers
2k views

Would having nail polish applied interfere with any process in an animal's horn?

I'm talking about actual horns, not antlers that are shed. I'm interested in either a rhino-like horn or an antelope like horn. Would nail polish block any important natural process? I'm thinking of ...
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3 votes
2 answers
150 views

How about this Unnatural eyeball shape?

I'm designing an intelligent alien creature that lives in the jungles of a tidally locked planet, a little bit more massive than Earth, and which orbits a red dwarf. One of the things I designed about ...
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4 votes
4 answers
119 views

Can a big creature have a flagellar-like motor for flying?

The flagellar motor of bacteria seems to be a perfect way to have a biological motor but since no complex multicellular creatures have used that method for flight or other uses, it must be harder to ...
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6 votes
3 answers
703 views

What are some alternatives to tannin in plant bark?

When creating the plant life on alien planets, photosynthetic pigments other than chlorophyll can be the predominant molecule to create foliage of colours other than green, as we see on earth but for ...
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3 votes
3 answers
243 views

How fast and how coarse does a sandstorm need to be to sand a human down to nothing in the span of an hour?

I am designing a world with extreme weather, which uses human survivability as a measure of time. I've equated something close to an hour for the time I am using, for simplicity's sake, but this poses ...
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7 votes
5 answers
371 views

What physical effects would 3000 years have on the physiology of humans on Mars?

This is my first ever question on here. I've seen a few posts on Martian physiology but since the answers on here are answered so well and by so many I thought I'd be more specific. How would human ...
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5 votes
5 answers
1k views

Why are there so many mosquitoes in the Arctic?

TL-DR: How to create a world with ecology similar to ours, that doesn't have such abominable plagues of mosquitoes in its Arctic summer? It is tempting to think of mosquitoes as a pest of the tropics, ...
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  • 4,418
4 votes
4 answers
776 views

Why would some species from the Homo genus be much more likely to be autistic than Homo sapiens?

In my world, there are three species from the Homo genus that make together a clade called "aquatic humans": merfolk (Homo maritimus) (their scientific name means "marine human"), ...
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0 votes
1 answer
104 views

What would be the differences between our society and one where almost everyone is half-sisters? [closed]

Imagine a medieval society composed entirely of women, with some small number of machines (let's say 7) which can take material from two women and combines it to create an embryo that's implanted in ...
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6 votes
3 answers
233 views

How can a creature have an efficient bird like respiratory system without hollow bones?

Upright; no tail. This is a creature that requires a more efficient respiratory system for longer intense physical activity. But it needs strong bones like mammals have. Bird air sacs extend into the ...
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  • 2,393
2 votes
2 answers
226 views

How much toxin could an elephant-sized amphibian put out through its skin?

I have a species of creature that is mostly amphibian in nature, though its size is probably more comparable to an Indian elephant. Their skin, like a poison dart frog or other similar amphibians, is ...
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3 votes
4 answers
538 views

A creature has one heart per bodily extremity. How large does each have to be?

The creature has several hearts, each supplying blood to one limb. For all other intents and purposes the creature is human. Of the six smaller hearts, one supplies each arm and leg, one supplies the ...
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1 vote
2 answers
131 views

What would be the optimal atmosphere for Earth's life and humanity?

Question Obviously Earth's atmosphere is just fine for life it, but is there a possibility of one composed of gases that would make life have an easier time living? If yes, what would it consist of? ...
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  • 65
4 votes
1 answer
107 views

a chemical component in vampire saliva to assist with feeding

I've been thinking about vampires lately, and I came up with the idea of a vampire's saliva containing some sort of chemical or hormone that assists with feeding. I think it would probably have to do ...
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  • 1,685
11 votes
15 answers
4k views

Why haven't humans been absorbed or exterminated by orks?

Ork advantages: Strength: orks are, on average, twice as strong as humans. Reproduction: ork females rarely die in childbirth and usually have twins. Height: orks can reach up to almost 8 feet tall....
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