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I watched all movies of the Alien series and I'm still unsure about the origin of the Aliens.

In the first movie it somehow got onto the Nostromo spaceship. Then in "Aliens vs Predator" there is something about the Predators keeping Aliens just to hunt on them.

I am confused. Where do the Aliens come from?

Alien Warrior

  • you see @bear, there are theese alien bees and theese alien flowers. Sometimes when they love each other very, very much aliens apear. – Cherubel Aug 10 '16 at 12:10
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    I have a suspicion that the Engineers need (or needed) a version of Alien that was not a parasite, but a symbiont. A parasite infests other creatures, feeding from them, creating offspring, and killing the host until all available hosts are dead. Then they die off themselves. A symbiont forms a beneficial relationship with another creature where both benefit and can carry on together. Like lichens. The Engineers could have created humans to be infected with Aliens but lead to a hybrid that is symbiotic rather than parasitic. – Howard Miller Aug 10 '16 at 22:14
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We don't know. James Cameron never wrote a back-story for them.

The shortest answer is that there's no canon explanation for their origin. The writer; James Cameron never created a back-story for the xenomorphs, content that each movie should stand on its own merits as this interview shows;

"Daniel Line asks more questions about the derelict which, as a writer, I could provide plausible answers for, but they're no more valid than anyone else's. Clearly, the dental patient was a sole crew member on a one-man ship. Perhaps his homeworld did know of his demise, but felt it was pointless to rescue a doomed person. Perhaps he was a volunteer or a draftee on the hazardous mission of bio-isolating these organisms. Perhaps he was a military pilot, delivering the alien eggs as a bio-weapon in some ancient interstellar war humans know nothing of, and got infected inadvertently."


If you want to go into more depth, there is an extensive speculative commentary on Aliens Wikia regarding the origin of the "xenomorph" aliens that Ripley and others encounter in the Aliens Franchise movies.

In brief, there's no in-universe description of where they came from, nor have we seen either their genesis as a biological weapon, or as a naturally evolved species on their own planet.

We do know from the film Alien that they weren't native to LV-426 and in the film Prometheus we see them being experimented on genetically (which definitely lends credence to the suggestion that the alien pilots seen in Alien and Prometheus were intending to use them as a bio-weapon) but that's about it.

There's also no indication whatsoever that the Predators had any hand in their creation.

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    The characters in Prometheus speculate directly about the likelihood that the building they discover is an Engineer military facility which was used to develop the xenomorphs as a biological weapon, intended to be deployed against Earth. While there's no canon "proof" that the aliens were created by the Engineers (as opposed to simply being appropriated and modified by them), I think the on-screen discussion about the possibility lends it heavy weight. – Brian S Feb 22 '14 at 12:13
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    @BrianS - I agreed with your point that without proof all there is is speculation. I'm not so sure you can jump from that to "they created the aliens", after all in Alien : Resurrection you find Ripley and various aliens inside a human genetic research lab. Aliens finding that facility could easily jump to the conclusion that we invented the aliens... – Valorum Feb 22 '14 at 12:34
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    @JohnO - Along with jarjar – Valorum Feb 22 '14 at 20:49
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    Wondering why James Cameron not writing a backstory should be the reason... Surely Ridley Scott would be the first authority on this? – Cearon O'Flynn Jul 1 '15 at 18:04
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    Alien was written by Dan O'Bannon and Ron Shusett, so they take precedence on development of the story. Aliens fleshed out many things, but didn't start the story. – Dan Kelly Jul 12 '16 at 16:10
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The Xenomorphs are almost certainly biological creations of the Engineers shown in the film Prometheus.

Why?

  1. Xenomorphs are able to reproduce inside of human beings - Without specific adaptations do so this seems to be impossible. And since they don't come from world where human beings are native, they cannot have evolved to break down the bio-chemicals barriers which separate organic species without some type of engineering.
  2. Xenomorphs are able to exist in Earth-like environments as demonstrated in the Alien Vs Predator portion the franchise - Unless they had been specifically adapted to this (which would likely have been a serious undertaking) this seems to be impossible that this would have been a natural occurrence.
  3. While the franchise never specifically states this, the Xenomorphs seemingly have only been found in areas where the Engineers have been present - Given the remote possibility that they evolved on either LV-426 or LV-223 (the planet and moon from the Alien/Prometheus franchise) then their existence should not have been a "surprise" to the humans which encountered them

While it is possible that a race of beings could have evolved to predate upon human beings or been biologically adapted to do so, it is more likely that such a being would be created to do so rather be a naturally occurring entity. Given the Xenomorphs proximity to the Engineers a reasonable inference can be made that their existence is the result of Engineer bio-technology experiments.

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    I'm upvoting because I think your answer is mostly correct, in that the Xenomorphs were biological creations of the Engineers. However, your first point is a little weak, since there are instances of Xenomorphs gestating in non-human mammals as well as Predators. en.wikipedia.org/wiki/… – Doresoom Jul 28 '15 at 15:27
  • Without specific adaptations do so this seems to be impossible... they're Aliens with acid for blood. Who knows what their physiology is capable of? – Daft Jul 28 '15 at 16:34
  • Seems like Aliens are able to exist in almost any type of environment, as opposed to being specifically adapted/engineered to Earth-like ones. – PoloHoleSet Jul 12 '16 at 15:20
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If you want to follow the comic books (which are non canon), they are simply animals taken from their own environment, where they (quite possibly) weren't even dominant species. I remember reading one version showing some unidentified alien fighting his way through the hive to steal one egg - once he was in space, the egg hatched and he became infected.

The Aliens wiki has some information about Xenomorph Prime

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If you've played Alien vs. Preditor, the videogame, at the end, the human race learns about the xenomorph home world location, but you can't tell where because the language on the computer is the preditor writing.

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    Is the video game considered canon for this franchise? – Aegon Jul 12 '16 at 13:35
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If you wanna know, go to the end of this writing and see the answer but it wont make sense if you just read that, it will make sense if you read all of this.

I gotta say, I've watched almost all alien series and i think I've figured it out that where is the xeno-morphs came from. OK, so in the first movie alien, the star-ship Nostromo got a distress signal from an unknown alien vessel. The place they landed was on Lv426. A The team went to go investigate then they saw the eggs in the space jocky( Alien Ship), yep, we get it. xeno-morph got to them. You know what happens in alien okay? Ripley escaped and was the survivor and went to cryo freeze. In the next movie called Aliens, which is the 2nd movie. Ripley was luckily found in a shuttle and yeah, she woke up at a hospital or something. She tells these people, idk who, but she tells them about the xeno-morphs on Lv426. And that's where the xeno-morphs where found. They didn't believe her because they said, there's nothing wrong with Lv426 and there hasn't been a problem about these creatures. There is a colony on Lv426 as they told her, she was in shock and she asked, '' how many families?''. The people said about 70 families. OK never mind about aliens, if you are reading this, you've probably watched the second movie ( Aliens ). A family got to a space jocky and yeah, a xeno-morph got to them. Yep a xeno-morph, a face-hugger from the same place from the first movie. They are on the same planet Lv426. So, you guys get it? Xeno-morphs came into Alien, to Aliens but where did they come from? Oh my friends, i think i know.

All the alien series( movies ) are in a timeline right? And Prometheus is a prequel to alien. Which means prometheus is first in the timeline I'm pretty sure that there were no xeno-morphs, before the prometheus time. Which means that in prometheus. The Xeno-morphs species were created, and i think i was the only one who knows that made them. Engineers? NO. Lets get to it!!

As you the the android from prometheus sabotaged Dr Holloway's drink and he got infected with the black goo. He had an affair with Elizabeth before turning into an alien Zombie. That made her pregnant with an alien baby which was the first face-hugger! She went to take out the alien with a machine, idk how to describe it. It looked like an alien snake from the black goo. It is a hybrid, i think sort of a human and black goo. At the end of prometheus. The first face-hugger goes into the engineer and then the first Xeno-morphs species were created!! There you go!! All the deaths in alien series(movies) were all because of a curious android named David. If it weren't for his sabotage, none of this would of happen in the movies. But it did and the mother of the species (Xeno-morphs) is Elizabeth Shaw.

All this is based on my opinion and the alien movies I've watched, if you think it is wrong, do you have an answer why?

Elizabeth Shaw created the species known as Xeno-morphs shown in prometheus. There's only one problem, I haven't seen Alien Covenant and i don't know what a protomorph is. I don't know the origin of proto-morphs. Maybe they're different species.

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    This answer seems to lack research effort. It also rambles a fair bit without really answering the question. – Valorum Apr 1 '17 at 12:27
  • ("COVENANT" SPOILER ALERT) Alien: Covenant has a few contradictions to the above. Together with Prometheus it shows that the Engineers created the black goo. This black goo clearly creates an organism of some kind, indicating the Engineers have experimented with Xenomorph creation. However with Covenant as you indicate the current specific type of Xenomorph was refined by David by bombing the city and countryside with black goo and then infecting different hosts, etc. This type of Xenomorph seems to be David's ultimate creation and goes on to be the Alien Xenomorph. – SaltySub2 Sep 4 '18 at 7:45

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