Questions tagged [xenobiology]

Use this tag to mark questions related to creating plausible alien biologies that may be close to or far removed from Earthly biology but within the realms of hard science.

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Abiogenesis of solid-state organisms that reproduce through rock melting and magnetism

When looking for alternatives to the classic carbon-based life I often found replies on why carbon is still the most likely element to base life on because it can create complex molecules, it can ...
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2 votes
0 answers
40 views

Alternatives for Phospholipid bilayer

What kind of inorganic materials might be used instead of phospholipid bilayer? It should be able to function in ammonia-environment. I had an idea of using phosphotungsic acid's anions based on this ...
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1 vote
1 answer
73 views

Explosive biology

My organism live in planet full of water . It has only small percent of land about 5% only. It is big as gorilla. It eats metal ores and gains sustenance from it. My organism developed an powerful ...
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0 votes
0 answers
41 views

Metamorphosis in alien vertebrates

For an alien planet I'm making I thought of some creatures which are descendants of non-metamorphosing creatures with solid bones. These creatures however have a very diffrent life cycle than their ...
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4 votes
4 answers
747 views

Can aliens evolve to communicate through X- or Gamma-rays?

My alien life started out inside deep caves on a dark and icy planet. Over millions of years, a strand evolved into a mighty, technologically-advanced civilization. To have achieved all that they have,...
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9 votes
3 answers
810 views

Hypothetically, can early humans have an alliance with giant ants? Maybe even assist humans 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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  • 113
9 votes
2 answers
98 views

Compressible satellite ears?

Essentially, I have a flying predatory creature in my world which is roughly the size of a raven and hunts at night, relying quite a bit on sound for echolocation in tighter spaces, hearing for both ...
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2 votes
1 answer
124 views

In an alternate world, can giant bugs and humanoids be in the same planet?

There must be a rise in oxygen, but too much O2 might poison humans so I thought the increase was a gradual change and both invertebrates and humans evolve the necessary respiratory systems and other ...
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  • 113
-3 votes
0 answers
41 views

Super concentrated energy [closed]

My organism is a bird . It lives in forest. It had dangerous predators with some superpowers. It has the ability to expel neural energy of predators which it can absorb through some body parts of its ...
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  • 149
-2 votes
1 answer
77 views

What is the color of flora on a superhabitable archipelago planet? [duplicate]

I learned that is theorized that a planet can be "superhabitable" if it has a size that is roughly twice that of Earth, the slightly higher gravity would mean a denser atmosphere with more ...
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4 votes
1 answer
81 views

Super powerful dragon biology

The lower jaw is hollow, to support the breath weapon, but the upper also has a weapon pocket. Each gland secretes a chemical that reacts with the other - the upper secretes a magnesium-rich oil that ...
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  • 149
-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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-1 votes
2 answers
71 views

Organic metallic compound [closed]

My organism have a weight of 270 kilograms. It have height of 2.49 metres. My organism is reptile and it lived in animals with metallic shells . My organism has bite force enough to crush car in ...
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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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4 votes
1 answer
93 views

Superheating furnace stomach

My organism lives near volcano. It consumes large quantities of rock and digests specific minerals, expelling the remaining rock, super heated by his furnace like stomach, as lava. What mechanism ...
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  • 149
1 vote
1 answer
244 views

Hypothetical animal material part 1 [closed]

My animal was in another world . It had bones, teeth made of tungsten. It lives in shallow environment. What would the bite force of my tungsten reinforced animal teeth ( assuming it is plausible)?
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2 votes
2 answers
114 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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3 votes
2 answers
176 views

Plausible evolutionary pressure for an organism to evolve space flight?

A recent question asked for a natural mechanism for a creature to escape one planet and go to another. The answers prompted me to this question. Given any answer to this, is there any plausible case ...
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-2 votes
1 answer
64 views

Alien biochemistry [closed]

My creature was alien which home was destroyed . It got into another planet similar to earth . Its organs are not like humans. It sustains itself with by passively drawing in body heat and the ...
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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
2 votes
5 answers
126 views

Scientifically plausible powers : part 1 [closed]

My creature was capable of creating plasmoid flames from thin air not requiring oxygen and combustible objects similar to this "The user can create, shape, and manipulate plasma fire or fiery ...
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  • 149
3 votes
2 answers
133 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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5 votes
2 answers
124 views

Superactinide Incorporating Biochemistry

Alright so as it is known, trans-uranic elements are universally unstable. However, in this setting, I'm using forms of quark matter that can imitate the nucleus of transuranic elements at least mass ...
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3 votes
1 answer
136 views

Can I put a Biological Refrigerator inside an organism and use it to create a sub zero spray?

Create a hypothetical creature. It has the basic components of a refrigerator inside it. It uses this internal fridge to create liquid atmosphere which it can spray. For condenser coils it has some ...
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2 votes
2 answers
143 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
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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3 votes
1 answer
121 views

Are there any alternatives to DNA in a fluorine environment?

In this fluorine life that I have been trying to make, are there any possible alternatives to DNA that could exist in these cells? The Environment: What I have so far is that these cells would exist ...
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4 votes
1 answer
120 views

Could hypothetical cells use Hydrofluorocarbons(HFCs) as their DNA?

Hydrofluorocarbons consist of long chains of carbon with hydrogen or fluorine attached to them. So you could have chains like: DNA uses patterns of nucleobases A C G T as a “language” to keep their ...
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2 votes
2 answers
320 views

How do Winged Sapient Creatures Keep from Panicking in Zero G?

I have plenty of space fairing aliens with wings that are capable of flight. I can’t help myself it’s just a cool feature for an alien and a have. But I want to adress A potential issue in getting a ...
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2 votes
2 answers
101 views

How can we make a dense atmosphere allowing floaters, that would be toxic for humans to breathe?

I think that balloon aliens are an interesting alien body plan. It is something practically never seen on earth and the only lifeforms I’m aware of that do anything similar are kelp that have tiny ...
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7 votes
7 answers
1k views

How did the vast nexus of hollows, caves and a thriving underworld on this alien planet come to be?

I had a unique idea for an alien planet. The surface would be snow-capped mountains and glacial fields, it's cold and essentially devoid of most life. But just underneath the towering mountains ...
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  • 2,013
5 votes
1 answer
118 views

Acetylene and Methane biology questions

First time poster, please be gentle. Long story short, my own alien worldbuilding/speculative biology project involves the idea that cyanobacteria and other oxygen producers never evolved and other ...
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0 votes
3 answers
72 views

How are macro-molecules made in cells? [closed]

In my quest to make fluorine based life, to main roadblock is my confusion on how macromolecules are made. Take phospholipids for example, it confuses me how cells can just stick a phosphate to a ...
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5 votes
1 answer
299 views

My eusocial species has biological radio and limited verbal speech. Is this plausible?

The mechanics of biological radios are already detailed in response to this question, but I had a more specific use of it that I was planning to use. My story has a eusocial species that can ...
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3 votes
3 answers
404 views

How do we tell a biosphere has been tampered with? [closed]

How could one distinguish a naturally evolved biosphere from one which has been manipulated in a subtle manner? Think slight genetic tweaks, targeted extinction events and so on. The process might ...
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2 votes
2 answers
227 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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2 votes
2 answers
154 views

Could hypothetical cells use liquid Carbon Tetrafluoride as an alternative solvent to water?

Setting aside how this might evolve or come to be, could a cell use liquid carbon tetrafluoride(CF4 becomes liquid below -130 Celcius) as a solvent instead of water? Assume that the cells work ...
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5 votes
2 answers
188 views

Most efficient form of locomotion for a super cell organism?

In my universe there is a planet that harbors a super cell organism created by an ancient precursor species. If you don’t know a super cell is theoretical idea where the cell can do just about ...
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2 votes
4 answers
155 views

How could hypothetical Fluoride-based cells synthesize methane?

For a thing, I am trying to make a detailed model for fluorine based life, starting with the cell. As an alternative to ATP energy, I have chosen the reaction CH4+(4)F2 ==> CF4+(4)HF, I just can't ...
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-7 votes
4 answers
122 views

How to create realistic alien evolution in a swampy planet? (Like dagobah from Star Wars) [closed]

Essentially, I’m curious to know what would be the most likely (semi-complex, multicellular) animal lifeforms to develop on planets with gravity similar to Mars and Earth.
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4 votes
2 answers
93 views

Could stromatolite formation be significantly speeded up?

Stromatolites form at an incredibly slow rate of around 0.5mm a year but I was wondering if more favourable conditions could speed this up? These stromatolites will exist on an earth-like alien planet....
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8 votes
4 answers
780 views

How to overcome the hygiene issues of prehensile mouthparts?

Currently, I am designing a sapient species whose only dextrous appendages are their prehensile mouthparts. I am aware that there are some issues with this, but I can think of ways to avoid or ...
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2 votes
3 answers
176 views

What might case cause the development of biological nuclear weapons as a natural evolutionary adaptation of a species?

Im doing a one-shot space campaign with some friends. One of the navigation hazards I wanted to add for my PCs was the system being infested with space Bourne biological life forms that, like some ...
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9 votes
8 answers
3k views

Life underneath a blue star

Blue stars are notorious for burning too bright and living too briefly for life to develop around them. But is there some way that life could survive long enough to reach the sentience stage? I'm ...
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6 votes
2 answers
136 views

Knuckle-walk in snow / very cold climate

Is knuckle-walking efficent on snow / ice / thick snow ? Can a predator large as a polar bear evolve this? Is protecting the claw in such way, to far fetch considering the fact that the beast need to ...
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  • 563
1 vote
1 answer
114 views

If I were to make a species that had semi plant like functions but was designed to be a hunter what traits would clash against each other

I named the species Smiles due to the constant grin they have on their faces. Their body is a perfect circle and they have 4 long limbs made of tendons and cellulose. The idea is if you cut off their ...
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-1 votes
2 answers
114 views

Science of speculative biology [closed]

My animal lives in planet full of rocks, so it evolved a drill-like mechanism in his hand. What material is that biological drill made of that crack granite like stones with ease ?
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21 votes
12 answers
6k views

Why would a supermassive sarlacc-like creature let captured prey wander around inside itself?

On a fictional planet far away from our own, there is a part plant, part animal creature of truly massive proportions embedded in the sand of a desert-like portion of the planet, kinda like a cross ...
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