Alien Xenomorph Biology Explained! (Because Science w/ Kyle Hill)

  • Published on May 18, 2017
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    The Alien franchise has shown us many forms of aliens from facehuggers to xenomorphs, but how does it all work? Kyle bursts through with an explanation in this week's Because Science!
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    • CHEMICAL A0-3959X.91 - 15:
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Comments • 3 296

  • Oh no it's marshie
    Oh no it's marshie 3 days ago

    Just gave me million more reasons to hate bugs..

  • Shane Knight
    Shane Knight 5 days ago

    Cut your hair you hippy

  • Ethan Schulze
    Ethan Schulze 6 days ago

    Acidglow went over Xenomorph not being a species name.

  • Jestermon1
    Jestermon1 8 days ago

    It's amazing those multi stage parasites ever evolved.

  • Mr. Mountaindew
    Mr. Mountaindew 9 days ago

    Have the facehuggers ever lost before?

  • JoeTD
    JoeTD 12 days ago

    As far as I was aware, the resulting Xenomorph from a Facehugger was because the facehugger adapted the biology of the host with it's own, therefore creating the Xenomorph. As well as this the black goo was an early development of the adapting genome. Basically, David created the Xenomorphs and the goo wasn't really part of the modern Xeno life cycle, as a Queen lays eggs independently and doesn't require a mate, and once the Queen dies, a Praetorian will malt into a Queen. The cycle goes :
    Xenomorph or any other form
    If you want the facts go to Viral Killer or Alien Theory

  • Kedama FOE
    Kedama FOE Month ago

    this is why i only deal with yautja at least there understandable

  • Cameron0899
    Cameron0899 Month ago

    So... facehuggers are like the xenomorph sperm cell

  • Foxy The Night Guard

    It's not xeno + xeno its queen lay eggs without other xeno

  • TitanShores
    TitanShores Month ago

    Actually the facehugger does attack a dog in Alien3...
    (Or a kinda buffalo, in the extended version)

  • Necro Drone
    Necro Drone Month ago

    I swear I am the only person on the planet that loves Alien3 XD

  • The Green Ninja 48
    The Green Ninja 48 Month ago

    Why do you keep saying ze goo

  • Spazzix Playz
    Spazzix Playz Month ago

    Where did u get this information??? HMMMM cuz a queen lays eggs not a Zeno… you know what

  • Xenomaster Alien
    Xenomaster Alien Month ago

    Pretty spot on

  • InEveryVideo
    InEveryVideo Month ago


  • Michael Reikes
    Michael Reikes Month ago

    You are giving Prometheus too much credit.

  • Pinstripe
    Pinstripe Month ago

    in some versions of the aliens they take traits from the host so maybe the goo is some material from them that has a chemical that allows them to do this and it may have been synthesized by that one dude from Covenant from materials on that planet then he began mixing species with them eventually creating the xenomorph a creature that can naturally make the goo and use it to create speciation between generations.
    Edit maybe the aliens are separate like the aliens that can impregnate others and take genes are the ones from alien vs predator and the main continuity aliens are the normal ones who cannot change form through generations both separated by ability to make the goo.

  • Zachary L
    Zachary L 2 months ago

    Eating broccoli while watching this is not a good idea..

  • themadness6
    themadness6 2 months ago

    N A N O M A C H I N E S S O N !

  • nicholas griego
    nicholas griego 2 months ago

    The drone can turn your body into an egg with a queen facehugger, and that’s how one alien created a hive

  • Vaultdude 18
    Vaultdude 18 2 months ago

    Nanomachines son

  • Console Collin
    Console Collin 2 months ago

    The Predalien completely ruins this with how it reproduces

  • CRK Dusk
    CRK Dusk 2 months ago

    For some reason we learned about the parasitic wasp thing in science class

  • xenomorph warrior
    xenomorph warrior 2 months ago

    I thought you were a girl

  • That one Gamer
    That one Gamer 2 months ago

    za goo XD

  • Julian Toepfer
    Julian Toepfer 3 months ago

    You were getting a like until you shit on Alien3, proving you don't know dick about movies, so now you get a big fat dislike. Good job hippie.

  • Jaymib
    Jaymib 3 months ago

    I always figure that the blacl goo was reversed bio engeering of the xeno, has the ship with the aliens egg crashed on the near by moon.

  • Sean Marlow
    Sean Marlow 3 months ago

    2:30 it is not any spider that the wasp does it to, they do it to tarAntula s

  • Doctor Turtles
    Doctor Turtles 3 months ago


  • ConceitedCynic
    ConceitedCynic 3 months ago

    Better to just say it’s a biological weapon that bonds with the dna of any living creature to form something more deadly. For instance the face hugger mates with the dog to make the runner. A typical xenomorph only comes when combined with human dna.

  • The Own
    The Own 4 months ago

    Actually I don't think the Facehugger is actually dying after it lays a xeno embryo in it. I actually think it's them transferring themselves into another. The main central nervous system is acted all on the embryo and after it's done transferring the facehugger dies, reacting more on nerve reflex. Similar to a butterfly leaving it's cocoon

  • Angel Eyes
    Angel Eyes 4 months ago

    Do girls ever tell you that your hair looks better than theirs?

  • Michael Chad Lynch
    Michael Chad Lynch 4 months ago

    You look like Thor

  • Spark Reptile
    Spark Reptile 4 months ago

    You forgot one thing : the xenomorph is partenogenetic

  • Cameron_ Coyote
    Cameron_ Coyote 4 months ago

    This theory may need to be rexamined as of the additional of alien 'Covernant' which explains the evolution and genetic selection of the Nenomorph to the Prodomorph and then finally to the Xenomorph

  • Atlas
    Atlas 4 months ago

    "zuh goo" joke got old after the first usage

  • anonymous Person
    anonymous Person 5 months ago

    xenos dont need mates bc xeno queen is bisexual

  • Rice Grainz
    Rice Grainz 5 months ago

    Ze Goo

  • Kevin
    Kevin 5 months ago

    I also think that the Xenomorphs are also inspired from bot flies

  • Jose BERGER
    Jose BERGER 5 months ago

    Actcally the things you call zenomorphs arent what black goo Does to human its the strange form with a ficical form the black goo is zenomorph Dna mixed with something

  • FNAH
    FNAH 5 months ago

    Fun Fact: I don't have dreams

  • Noah Juarez
    Noah Juarez 5 months ago


  • Leveret Xu
    Leveret Xu 5 months ago

    what about the event of grown up xenomorph impregnates moms in the hospital directly without facehugger in AVP2? Why predaliens in this movie only able to breed xenomorph warriors and not new cross breed species between alien-predator-human?

    COMBINE 5 months ago

    Does actually the goo interact with human directly creating eggs? Aren't eggs produced by the Queen?
    I think the "classic" Giger's xenomorph species was created accidentally by Engineers or simply occured by evolution.
    There's no causal connection between the goo and the "classic" alien species. The goo is responsible only for metamorphoses in "Prometheus" movie (and maybe in "Covenant", but in Covenant goo used to simply kill Engineers and other animalish stuff, the actual alteration of species was caused by some puffball "spores", which can be a product of the goo, of course).

  • Creative- Name
    Creative- Name 5 months ago

    So what's the difference between the traditional xenomorph and the zombie xenomorph? I'm guessing the traditional xenomorph was created by some other nonhuman predatory species that interacted with the goo, and for some reason the biology of these creatures closely matches that of humans (the creature would have to be a cross between a mammal and an insect), which makes human hosts conducive to reproduction. The zombie xenomorph is the first time we ever see a human being changed from the goo, which would then become it's own species of xenomorph had it had the chance to reproduce. Or perhaps the goo causes mammalian species to become more insectoid, developing exoskeletons and more acidic blood. Are there any chemicals in the real world that can cause genetic changes like this? My guess is it would have to be radioactive since radioactive material can cause gene damage, but not changes in the genome like the goo does.

  • Piechowski Kamil
    Piechowski Kamil 5 months ago

    Facehugger + Engineer = Ultramorph

  • miss unknown
    miss unknown 5 months ago

    Why does he look like jesus

  • Suco de Ideias
    Suco de Ideias 5 months ago +1

    Isnt holding alot of pens complicated ?

  • SteppingBus268
    SteppingBus268 5 months ago

    What about xeno queen

  • Sovietic Panter
    Sovietic Panter 5 months ago

    It's a fucking space cockroach, my only weakness was turned into a movie...

  • millitary 95 / rybear 1977

    One question....... how cold is "the goo"

  • Lisa Eames
    Lisa Eames 5 months ago

    What about the predalen

  • Lexander Douglas
    Lexander Douglas 5 months ago

    HOW DID you survive that Facehugger that burst out of your chest (PLEASE DON'T JUDGE MY GRANDMA)

  • Araceli Mora Reyes
    Araceli Mora Reyes 5 months ago

    I have never seen the xenon have sex.

  • Dark Lord
    Dark Lord 6 months ago +1

    Isn’t it an evolutionary disadvantage to be SO relient on other organisms? Like they can’t survive without other animals. That’s like us having sex with a tiger to have babies

  • Galaxy News
    Galaxy News 6 months ago

    Kyle, I was wondering what movie YOU think is worse Alien3 or Alien: Resurrection

  • trenton taylor
    trenton taylor 6 months ago

    8:16 theres no facehugger there XD

  • nast the smool potato!!!!

    I never get dreams and a bulky nightmare but mostly not as bad as kids be XD BTW IM 13 AND I'm not scared XD

  • LexicalGaming
    LexicalGaming 6 months ago

    A human doesn't transform into a xeno, they transform into a drone which turns into a warrior to praetorian and then queen. if there already was a queen, the praetorian might transform into a carrier or ravager. The "dog" alien or runner transforms into a Chrysalis, smasher, or crusher, I don't remember exactly this strain's life cycle.

  • G Grime
    G Grime 6 months ago

    Xenomorphs don't mate there like ants in a way but some xenos eventually molt into queen xenos and the queen puts itself on a wall grows a egg sack and starts laying tons and tons of eggs and they hatch face huggers that mostly leave the nest to find a host by there self unless there are hosts already trapped in hive walls with only there face sticking out making them helpless

  • archon099
    archon099 6 months ago

    Wasn't the alien from Alien 3 formed from a face-hugger using a dog as the host? That's why it was so different from the humanoid ones. But yes, that movie was indeed bad, lol.

  • Aer
    Aer 6 months ago

    Almost like Prometheus shouldn't have ever existed

  • Ollis Solrain
    Ollis Solrain 6 months ago

    Waylin wanted strong Replicants lol

  • Jeff Pattison
    Jeff Pattison 6 months ago

    Good explaination. It shows how the original concept really went off the rails. I think Bannon and Shusett imagined it as a natural species, but it is too specifically adapted to prey on humans and attack the structures of modern civilization to be that. Scott thought it was a bioweapon, but horizontal gene transfer messes that up. It’s great for artistic expression, but a weapon that adapts its way around designed safeties or loses its potency by picking up weak genes is not particularly useful for ensuring the clearing of planets of sentient life. That black goo, aka monster sauce, is not a much better concept, because it too is an uncontrollable doomsday weapon.
    I tend to look at the engineers as gardners, manipulating the biospheres of habitable planets to produce the resources that they need. To them, we are just weeds that need to be pulled when we threaten their vegitables.

  • pink smog
    pink smog 6 months ago

    THANK YOU! I got so mad when they took their helmets off in Prometheus!

  • ziljin
    ziljin 6 months ago +1

    I love how he says ZE GOO!

  • Gabriel Nicolas
    Gabriel Nicolas 6 months ago

    8:15 its basically evolution

  • ci rob
    ci rob 6 months ago

    Nice theory of evolution

  • SepremeDuckling_Yt at robox

    What does zuh goo do to a xeno morph

  • Ronnie Dorsey
    Ronnie Dorsey 6 months ago

    Watching this on TV lol, didn't know you would be on cable

  • TheManCone Yo
    TheManCone Yo 7 months ago

    Great video one very well could theorise just on the movies alone that an alien could simply sting someone turning them into an egg sac that would give birth to several drones and eventually a queen to help establish a hive and the warrior class smooth domed ones would be birth from face huggers to help protect the queen or establish a new hive and in rare cases a drone would turn into a pretorian gaining the stinging reproduction ability you could even squeeze the raven into the cycle saying it is the result of one queen being present with one drone it would not evole into a pretorian but need to establish a paremiter and be able to ward off possible threats a single drone couldn't handle outside of a swarm.

  • Bryan De la Hoz
    Bryan De la Hoz 7 months ago

    It's a little disturbing that no one commented that 1.733 is the square root of 3, not the cubic root.

  • Megopteryx
    Megopteryx 7 months ago

    Ze goo

  • jose soto
    jose soto 7 months ago

    lol "Vagina Snake"

  • Jannes Planting
    Jannes Planting 7 months ago

    To me they all just look like a bunch of messed up Chozo Statues...

  • Dereck Heineman
    Dereck Heineman 7 months ago

    Why were the comics completely ignored. They almost fully explain the lifecycle of the xenomorph

  • wallawallaboy
    wallawallaboy 7 months ago

    I wonder if you could fit the dog in by suggesting that maybe the egg also had some of this black goo to alter the egg to accept some of the dog traits

  • Hillary Clinton's racist Kara Swisher interview

    *Kyle is incorrect - Xenomorphs don't mate - nor do they need to. The films, comics, novels, etc reveal that Facehuggers can alter their embryos to become Queens - and a Drone can actually alter its DNA to become a Queen, when none is present. Human hosts can also be captured and can be turned into eggs. There is no sex within the Xenomorph species. Kyle needs to do his homework.*

    • GameWorldPlayer GWP
      GameWorldPlayer GWP 19 days ago

      You are wrong about the drone to queen dnd thing, The Drone needs to evolve into a warrioe and then a praetorian and praetorians can become queen if there is none and when i praetorian molds into a queen that dna strain i locked and makes unavalible to other preatorians until the queen dies

    • Araceli Mora Reyes
      Araceli Mora Reyes 5 months ago


    • Ryan Swafford
      Ryan Swafford 6 months ago +6

      The entire purpose of mating is to get genetic diversity. They get that from the host. Thus, they have no need for mating or even sexes. The "queen" is just laying barely conscious, intermediate delivery organisms.

  • Joseph Nicely
    Joseph Nicely 7 months ago

    Alien3 comment=awesome.

  • SuperBendy Logan
    SuperBendy Logan 7 months ago


  • Michael Thomas
    Michael Thomas 7 months ago

    So are you saying the predators(yautja) have been hunting xenos since the early stages of human existence because yautja have hunted xenos for tens of thousands of years

  • Baptiste Robert
    Baptiste Robert 7 months ago

    Prometheus never happened

  • Damon Anton
    Damon Anton 7 months ago

    This is the vsauce of movies

  • Matthew Bennett
    Matthew Bennett 7 months ago

    You're so wrong about everything and I hate your face

  • T-rex Hunter
    T-rex Hunter 7 months ago

    Actually... xenomorphs dont mate, the xenomorph queen lays eggs every few seconds, its born from a royal fachugger

  • Jingo Unchained
    Jingo Unchained 7 months ago

    Prometheus was an abomination

  • Seth Begley
    Seth Begley 7 months ago +1

    Mac weldin'

    The act of constructing a McDonald's foundation.

  • Joshua Morman
    Joshua Morman 7 months ago

    I like how you approached it but I think xenomorphs don’t need a male and female to reproduce, the females queen can lay eggs on their own simply by consuming enough food, the purpose male xenomorphs serve is to protect the queen since only females can lay eggs and males become praetorians but not queens while females become queens after becoming praetorians or its even possible that they are all neither male or female

  • Mark Anderson
    Mark Anderson 7 months ago

    So Xenomorph goo is Mutant Aids.

  • herp derp
    herp derp 7 months ago

    are you inside a glass box?

  • Biljana Stekovic
    Biljana Stekovic 7 months ago

    ze goo ZE GOO ZE GOO!!!!!!!!!!!!!!!!! STOP SAYING IT!

    GOLDEN SHINRYU 7 months ago

    flame throwers are your best friend

  • Haylene De Clercq
    Haylene De Clercq 7 months ago

    Z E G O O !

  • TheRafa123
    TheRafa123 7 months ago

    The life of a xeno:From a egg (neomoprh i think) that hatches wen a host is near the face huger inside the egg and get on his god dam face and gives me xeno baby ;D the face huger gives him a supli of oxygen after some time the xeno chest buster that in like a day grows in a adult drone after some time that adult goes into a warrior and pretorian that cac go into a Queen that grows a sack of eggs the she lais down the drowns make the nest that the Queen stays in normal xeno or warriors dont have to mate they dont mate a drone evolvs step by step in a Queen but there are super face hugers that have queeb babys embryos ;D and a drone to protect the new born Queen no mateing involvd no mateing beetween xenos (excuse ma ba engleash)

  • RockDragon
    RockDragon 7 months ago

    ZE GOO

  • Jules Savvy-Bennett
    Jules Savvy-Bennett 7 months ago

    Do you write backwards or do you write normally and flip the video

  • the laws of physics boi

    Zee goo! (Dun dun dunnnn)

  • Alex Fraser
    Alex Fraser 8 months ago

    I kind of want a tarantula hawk wasp as a pet now. Spiders wouldn't go anywhere near me.

  • NeoDragonCount
    NeoDragonCount 8 months ago

    Prometheus ruined the Alien franchise for me. It was much better when Xenomorphs were simply a deadly extraterrestrial fauna that the foolish humans thought they could control.

  • MI6
    MI6 8 months ago

    *ZE GOOH*