Questions tagged [aliens]

For questions about a different and uncharacteristic species or object that has come to the world from another world. NOT for questions about extraterrestrials in their native environment.

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what shape would a planet entirely dedicated to watching be [closed]

If I have a planet fully dedicated to watching (think the Eye from Magnus Archives) what shape would allow for constant observation of the whole planet from some sort of tower
Overflight's user avatar
15 votes
7 answers
4k views

Would creatures that drink liquid instead of eating have a stomach?

Is it possible for a creature that exclusively relies on liquid consumption? Specifically, considering the absence of solid food, would these creatures have a stomach?
asteroidbelt's user avatar
0 votes
1 answer
158 views

If a curious solo alien arrived at Earth, what would the most likely human response be? [closed]

Revised question: Suppose a singular alien in his small starship (probably around 200m long) exits warp just outside of Earth's SOI. He, perceiving Earth to be a colony somehow missing from his star ...
Ylahris's user avatar
  • 487
6 votes
4 answers
1k views

How would an alien civilization equivalent in advancement to humans today hide their existence from future humans?

160 light-years from Earth, 1000 years in the future, exists an alien civilization roughly equal in its technological advancement to modern civilization on earth. They fear the possibility of the ...
cxnhgfh's user avatar
  • 69
-3 votes
1 answer
89 views

What color would a purple alien blush? [closed]

I know that we blush because of something to do with our blood, so what color would someone with purple skin blush? Darker purple?
SkyeQuake25's user avatar
9 votes
9 answers
2k views

Cybernetic AIs get hacked, while sentient AGIs are immune?

First question, I hope I do this right! I have a world in which most of the Solar System (including Mars, some Lagrange points of Venus, and most of the gas giants’ moons) have been colonized set a ...
controlgroup's user avatar
  • 1,856
0 votes
2 answers
251 views

A creature gaining Energie through Movement [closed]

I basically have a Facultative anaerobic organism that lives in space (not from another planet but the vacuum of space) and the creature needs to travel to survive. It's not just movement that keeps ...
Lumi's user avatar
  • 19
18 votes
5 answers
4k views

Which Law Enforcement/Government Agencies Would Be Called to Respond to the Crash-landing of a UFO?

I'll keep this brief: I'm not too well versed in secret government protocol nor have I read enough sci-fi books on this type of matter. But simply put, in my story, a series of UFOs crash land around ...
user avatar
1 vote
2 answers
185 views

Effects of Planetary Neutron Bombardment [closed]

A space civilization blackmails Earth by bombarding Venus with massive amounts of neutrons. It's one of their main technologies and there are reasons for not doing it otherwise. What would be the ...
Daniel Ramires's user avatar
1 vote
1 answer
141 views

Is silicon-based blood possible?

I'm building a project featuring several very exotic alien worlds, one of which I had a question about the blood of aliens since the amount of Metals like iron are scarce, so I opted for something ...
M. S. Cancris 's user avatar
12 votes
11 answers
3k views

What is the best term for a species that originated on another planet?

In a future where humanity has expanded to live on multiple planets and then encounters life that does not trace ancestry back to earth, what is an appropriate term for such life? "...
Zags's user avatar
  • 2,717
0 votes
1 answer
105 views

Underwater Civilisation warfare [closed]

I'm interested in finding out, for a humanoid civilisation that develops underwater (with gills), how would they develop the equivalent of a modern-day assault rifle, with a minimum effective range of ...
boboranonymous's user avatar
0 votes
2 answers
142 views

What would Religion that worshipped humans be like with alien followers and why would they do so [closed]

I'm writing a story with aliens from another planet worshipping humans on earth and wanted to know why would a alien species of spider-like humanoids do that. Especially since humans aren't that good ...
user avatar
5 votes
6 answers
1k views

Eyes that aren’t spheres: possibilities? [duplicate]

I have a sci-fi-like universe and one of the species has long, vertical eyes. But would this be anatomically possible without a sphere-like structure? I know that compound eyes are a thing, but how &...
apsistema's user avatar
3 votes
5 answers
355 views

Insectoids and the concept of 'eating well' [closed]

In this project of mine a species of sapient, spacefaring insectoids exists among humans and humanoid species. The insectoids are puzzled by something in humanoid cultures- specifically the idea of ...
king of panes's user avatar
15 votes
17 answers
4k views

How can we meet aliens in an underpopulated galaxy?

I am designing a hard sci-fi universe where humanity is confined to the Solar system and travels using fusion. One of the obstacles I am facing is how to make humans meet one alien race which is ...
FrogOfJuly's user avatar
  • 1,148
3 votes
6 answers
602 views

Is there a maximum number of fingers a species can have in each hand? [closed]

We have 5 fingers in each hand (10 fingers in both hands). So we count in a base of 10 (decimal base) which has the accepted digits of 0 to 9. Higher bases have more accepted digits; for example ...
Snack Exchange's user avatar
18 votes
4 answers
2k views

Does the inclusion of common non-humanoid alien species make rare humanoid alien species more believable?

In a Sci-Fi setting, if there is a vast amount of non-humanoid intelligent life in the universe, like perhaps 20 or 30 species, would this make 4 or 5 species that look similar to each other, or ...
Connor Dawn's user avatar
2 votes
2 answers
391 views

Feasibility of a convergent neural code across species?

I've got a sort of "mind-reading" system involving interpretation of electric fields/impulses in the brain, basically an advanced BCI (brain-computer interface), but the key point of this ...
inkwell87's user avatar
  • 889
3 votes
1 answer
234 views

The miraculous substance of carrangan: can it exist, and what does it change about its planet of origin?

First, this account is a replacement for my old one, Jobah_HigherMind, because I forgot the password after being inactive for four months. But I’m moving away from Algennon questions, at least for now,...
Jobah619's user avatar
  • 117
15 votes
5 answers
3k views

What would aliens glean from our consumer grade computers? [closed]

David just bought a $1500 grand computer, he put the parts together himself. He was about to play some games on it and aliens just yoinked it to study. Without even looking at David or the biology of ...
neo flare's user avatar
  • 1,415
3 votes
5 answers
307 views

How bad would it be, if aliens wiped out high-end processor production? [closed]

Let's imagine Contact with some space-faring civilization tomorrow. We will meet them, "shake their many appendages, <...>, and even attempt diplomacy." The result is that in a few ...
FrogOfJuly's user avatar
  • 1,148
3 votes
5 answers
345 views

A Roswell damage control [closed]

An alien ship crashlands and the it is not completely unrecoverable. Unfortunatelly locals and the police, as well as some camera crews arrive at the scene before my intelligence agency does, so ...
user3653831's user avatar
6 votes
1 answer
273 views

Are there any alternative genetic systems which could allow for the development of emergent complexity?

DISCLAIMER: I am an (intensely interested) layman, not a scientist. Please take my summation of the following concepts accordingly. I'm currently trying to worldbuild a plausible alien species down to ...
the-protean's user avatar
8 votes
6 answers
1k views

Biological human-alien language barrier

Something I've been pondering- spacefaring humanity makes contact with alien species who, while being intelligent enough to learn to understand human languages, their throats or vocal cords (assuming ...
king of panes's user avatar
4 votes
3 answers
271 views

Chlorine-breathing insectoid species

I'm trying to come up with a plausible atmosphere of alien world (Callisto moon) inhabited by insectoid race (they live in caverns underneath/inside the ice crust). I read that chlorine is a much ...
Anton's user avatar
  • 315
3 votes
2 answers
223 views

How could a carbon-based mechanical lifeform evolve naturally? [closed]

Imagine that there is an inhabitable planet that has just been discovered by human colonists. All of the unicellular life and some multicellular life such as plants is normal carbon based life made of ...
Kevonni's user avatar
  • 139
1 vote
4 answers
205 views

Could this hypothetical molecule “read” gene code, to allow universal epigenetics?

Here’s the idea: I want to create a biological info-storing material, probably much like RNA, that—like noncoding RNA does—is able to mediate and enact epigenetic changes to the genetic code/material ...
inkwell87's user avatar
  • 889
3 votes
5 answers
627 views

Could a species with multiple types of genetic material, like a “universal donor”, reasonably naturally exist?

As of late I’ve been developing a concept for a species able to transmit traits through genetic information, basically putting that information into a “host” organism to enact some sort of epigenetic ...
inkwell87's user avatar
  • 889
1 vote
4 answers
216 views

How would I get a moose sized creature with no mouth to be able to survive?

The creature I have thought up has no mouth or eyes. It doesn't eat or drink. It feeds off of the energy present at the core of it planet. The creature is the size of a moose. It has a skeletal and ...
Gwinky 's user avatar
8 votes
9 answers
4k views

Is it believable to store information in live DNA for billion years?

Imagine a civilization that approaches Kardashev II. They are deep into spacefaring, they live on a few less than one-hundred colonized worlds. They've not found evidence of other sapient life, so ...
FrogOfJuly's user avatar
  • 1,148
3 votes
1 answer
118 views

Can combustion create ATP

Could the heat and light from slow and controlled combustion produce ATP from ADP and inorganic phosphate? Could the heat and light drive proton pumps and then could ATP synthase produce ATP from the ...
GrimmReaper18B's user avatar
1 vote
4 answers
206 views

Can cells and other materials be controlled electromagnetically

I'm trying to make a creature with a specialized organ that can be controlled telekinetically with cellular precision. Basically the creature would have a specialized organ connected to the brain that ...
GrimmReaper18B's user avatar
1 vote
2 answers
478 views

Can just heat be used to power ATP production?

I want to have some lifeforms that live around and in hot environments and absorb the heat around them to produce ATP without using any other energy sources. Is this possible? How can this be done? ...
GrimmReaper18B's user avatar
3 votes
2 answers
254 views

How can I make this mode of reproduction make sense?

I'm workshopping a sapient fantasy species, that, in lore, was designed by external forces to be a biological weapon. This species accomplishes this with a form of sexual parasitism that enables them ...
Tardigreat's user avatar
  • 1,173
0 votes
2 answers
193 views

What features will make this creature OP? [closed]

I'm designing several alien worlds, I want each to be very unique. One idea I had (thanks to an online alien fauna generator) was a planet where one species has wiped out all other creatures. It ...
Infinite_Maelstrom's user avatar
4 votes
4 answers
309 views

How much would an alien species, given radio technology on par with ours, know about our world purely from overheard TV broadcasts/radio?

Let us play with the Aliens Steal Our Cable TV trope and assume that... aliens living about 15 lightyears away can listen in on human radio and TV-broadcasts their technological advancement is such ...
Katy's user avatar
  • 127
14 votes
15 answers
5k views

Could there be an alien life form (a complex animal) that lives hundreds of thousands of years, or even millions of years?

On earth, most animals live decades, and only a handful over 100 years. What has led to such a 'short' lifespan across the board? Assuming there may be other carbon-based life forms similar to that of ...
Sach's user avatar
  • 888
7 votes
5 answers
1k views

How long can it take from alien first contact to immigration? [closed]

A magic portal between our world and another earthlike one opens near a large city of a first-world country in the present day. Governments on both sides learn about it and take control within days. ...
Pyritie's user avatar
  • 941
1 vote
1 answer
367 views

Is it possible for a race of alien humanoids to evolve a diet based of semen?

On this planet there are two species of alien humanoids creatures , one group evolved an omnivore based diet and the other has a semen based diet, both groups are bipedal and share a common ancestor. ...
user avatar
0 votes
1 answer
147 views

Earth, Mirrored-Earth and aliens finding their location [closed]

There is our Earth. In a nearby galaxy there is Mirrored-Earth, much like our planet, with the exception that humans there are flipped left-right wise - so e.g. their hearts are mostly on the right ...
throwawayrandomaccount's user avatar
3 votes
2 answers
1k views

Could all of human population fit in China, India, and Mongolia?

I have a scenario where Aliens must escape their Star system because a star 5 light years away from them is going nova soon. They find humanity and learn all about them in a few years - our whole ...
Mishima's user avatar
  • 979
-1 votes
1 answer
70 views

Hycean world space travel [closed]

Hycean worlds are planets which bridge the gap between rocky and gas giant planets. They have atmospheres high in hydrogen and vast oceans with perhaps no dry land at all. How could the local sentient ...
Joe Smith's user avatar
  • 3,192
7 votes
4 answers
372 views

How to make a signal difficult to find?

There is a construction fleet that has turned up on earth, to prepare it for extraterrestrial visitors (it's the new galactic place to be). In order to assist the locals (us) in understanding what is ...
Michael B's user avatar
  • 371
3 votes
3 answers
274 views

How would copper based skeleton evolve in an alien species

I'm working at a special biology project for my art degree. Of course, as an artist I am lacking when it comes to chemistry. I want the organic compounds that make their skeletons or exoskeletons ...
Radu Dan Coroian's user avatar
1 vote
1 answer
143 views

How would a "universal language field" work? [duplicate]

Looking to work with the topic of interspecies translation, covering a very wide variety of alien types and biologies, with a "universal translator"—but rather than a universal translation ...
inkwell87's user avatar
  • 889
-2 votes
1 answer
114 views

Carbon planet gardens [closed]

This is a restart of my previous question: let's say there was a carbon planet with life. That means it would use hydrocarbons as a solvent and since the molecules are more complicated, all reactions ...
Joe Smith's user avatar
  • 3,192
6 votes
9 answers
2k views

How do I design a scientifically plausible alien being that is a network of space dust?

My alien is a consciousness physically embodied in a network of space dust. It lives in the interstellar void. How could I make this scenario semi-realistic? What would be the being's source of energy?...
marmel's user avatar
  • 814
1 vote
1 answer
101 views

Carbon planet autotroph [closed]

Life on a carbon planet is supposedly plausible. But what would the autotrophs, or plants, be like? The life would use hydrocarbons for a solevant, but that's all of the biochemistry I have fixed, ...
Joe Smith's user avatar
  • 3,192
13 votes
12 answers
5k views

What feature of Earth would be most likely attract the interest of aliens? [closed]

What feature of Earth would be most likely to attract the interest of a curious alien intelligence searching the Milky Way marking the Earth as an unusual world and how close would they have to be to ...
Slarty's user avatar
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