Linked Questions

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votes
3answers
1k views

Would Aliens Look Like Humans, or Totally Different? [duplicate]

As far as I'm aware, there's no way to be certain what any extraterrestrial entity might look like, seeing as how we can't verifiably prove such entities even exist. But I've heard speculations as to ...
3
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6answers
2k views

How to justify humanoid aliens without convergent evolution [duplicate]

Lets say that at least one alien is proven to exist, and it is roughly humanoid. It may have Klingon ridges on it's forehead, or blue skin, or have an extra set of limbs somewhere, but it's ...
1
vote
3answers
303 views

How alien is possible? [duplicate]

Let's assume for the moment that we're not alone and there is indeed more life out there. How alien could it be? Is it likely that aliens will be humanoid with funny faces (like Star Trek) or is it ...
16
votes
14answers
7k views

Could you populate a hospitable planet with only a vial of DNA?

In my world, the characters have to travel to a new planet and start all over again. Say they make the journey in a space ship transporting a bunch of human DNA samples. If this ship crashed on the ...
27
votes
5answers
5k views

Humans born without legs: how would they thrive?

or, Anatomically Correct Weebles A group of behaviorally modern humans was cut off from the rest of the earth-like planet millennia ago. (Myths hold that the separation occurred four to five ka BP, ...
9
votes
7answers
2k views

Humanoid aliens, lazy worldbuilding or a good basis?

In countless science fiction series, mainly the more popular ones, almost all of the aliens appear humanoid, that is bipedal with 2 arms and two legs. Is it a bad idea to include this in worldbuilding?...
10
votes
4answers
3k views

Alien race similar to human but without anything in common

(First of all, perhaps this is a duplicate of this question, but I'll give it a go since I'd like to focus on something different. Or the answer is there but I couldn't quite catch it. Oh boy... *...
8
votes
6answers
1k views

What would infrastructure look like on Interstellar's “Miller's Planet”?

In short, Miller's Planet is described as a "potential habitable planet" with very massive tidal waves as tall as 4,000 feet. If for some reason, life began in this planet and is destined to evolve to ...
5
votes
6answers
669 views

Would convergent evolution favor aliens being similar to Earth life? [closed]

We all know of convergent evolution, in which animals of similar environments yet with no relations often look similar (dolphin-shark for example). Animals in the real world do this because the best ...
3
votes
7answers
869 views

How does an Alien world have Earthlike creatures?

Is there a storybuilding device that can explain why alien worlds could possibly have similar creatures to that of Earth? I can understand why stories set in alternate Earths and fantasy versions of ...
14
votes
1answer
3k views

Anatomically Correct: 4-legged sapient creatures (“centaurs” etc.)

This is a part of the Anatomically Correct series. If a magic-free fantasy/SF world were to have naturally evolved hexapods as humanoid as possible, living among bipedal humanoids, how would they ...
12
votes
3answers
943 views

Would co-orbital planets with very similar convergent evolutionary paths be possible?

Picture, if you will, four planets sharing the exact same orbit and orbital speed, and separated by exactly same distance from each other. Each planet is the same size and roughly the same ...
0
votes
1answer
345 views

Fantastic beasts and where to find them: galactic edition [closed]

Far in the future, when we have the resources and ability to travel all over the galaxy, we will, no doubt (hopefully), finally encounter alien life. The chances of us being the only planet with ...