The Deadliest Being on Planet Earth - The Bacteriophage

  • Published on May 13, 2018
  • A war has been raging for billions of years, killing trillions every single day, while we don’t even notice. This war involves the single deadliest being on our planet: The Bacteriophage.
    Created with scientific advice and editing by James Gurney.
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    The Deadliest Being on Planet Earth - The Bacteriophage

Comments • 27 826

  • Kurzgesagt – In a Nutshell
    Kurzgesagt – In a Nutshell  5 months ago +6636

    You like our art and want to put it on your wall? Look no further:

    • Mostafa kamel
      Mostafa kamel 20 days ago

      do phages kill good bacteria

    • I drink bleach
      I drink bleach 22 days ago

      Can they kill immune cells?

    • Tim 74
      Tim 74 26 days ago

      What if the fages become a danger to our cells?

    • Maskone
      Maskone Month ago

      Well it doesn't have any power to kill cancer but I'm glad it exists to kill those other bad diseases.

    • Vincent Agustin
      Vincent Agustin Month ago

      Kurzgesagt - In a Nutshell . Can phages defeat cancer ?

  • Adonan the Stoic
    Adonan the Stoic 4 hours ago

    5:11 Bacterihelm scream

  • Jeremiah Taala
    Jeremiah Taala 4 hours ago

    If it is called the deadest being on earth then why does it save people’s life instead of killing them

  • Jeremiah Taala
    Jeremiah Taala 4 hours ago

    This video helped me learn

  • Lodi petmalu Tutong
    Lodi petmalu Tutong 9 hours ago

    I think in Philippines had no bacteria we know to wash our hands with out soap

  • Blissfully Ignorant
    Blissfully Ignorant 13 hours ago

    Antibiotic are use mostly for food production, cattle,pigs,and chicken that's the problem

  • datTweenlife
    datTweenlife 14 hours ago

    Jim get the phage nuke ready,were killing Ebola

  • Ian B
    Ian B 14 hours ago

    I’m allergic to antibiotics 🙁🙁🙁
    If I take one I go to the hospital for a month

  • User Library76
    User Library76 17 hours ago

    Why did I laugh so hard when he said *while they do commit genocide for breakfast...*

  • Johnathan short
    Johnathan short 17 hours ago

    So puting the most deadleast thing in use won't harm use and it will save us? 😰😰😰

  • 10,000 subs without any vids?

    It's a hard knock life for bacteria

  • Travelers
    Travelers 21 hour ago

    Nice worms reference. :P

  • Hyper Squrle3
    Hyper Squrle3 22 hours ago

    Some forward this to the president ASAP

  • BARTYB 2000
    BARTYB 2000 Day ago

    Can bacteriophage defeat gonnorhea

  • me like tea
    me like tea Day ago +2

    ty phages 💕

  • Dante Rombouts
    Dante Rombouts Day ago

    1:12 genocide for breakfast

  • InTo ReKa
    InTo ReKa Day ago


  • Alduin Hearth
    Alduin Hearth Day ago

    WORMS 3D reference right there, the game that made me love parabolas.

  • Aang An
    Aang An Day ago

    But what if in the process phages will evolve to kill good bacteria? Cuz it won't have evolved protection against phages? Or, what if phages will evolve to invade human body cells? Then what?

  • Jason Yau
    Jason Yau Day ago

    Hope this is able to kill diseases like AIDS

  • Zekaia
    Zekaia Day ago

    But how is phages is the deadliest in earth? I mean how did the y become deadliest when they save lives?

  • VeRsaCEoN ThEflOOR

    No problem human cells are not affected by bacteriophage so it might good to use as a medicine and help many people.

  • Carl floor
    Carl floor Day ago

    MMM, genocide for breakfast.

  • Matt Lawrence Marquez

    2:16 In the final step they produce Pacman boiii

  • MC hacker
    MC hacker Day ago +1

    Why did anyone even think about dislikeing this?? 1 they think kurzgesagt are lieing 2 they are paranoid 3 they are haters

  • Slimy Demon
    Slimy Demon Day ago +2

    So, they're kinda like rambos taking out giant monsters

    • Fire Power701
      Fire Power701 4 hours ago

      Slimy Demon Why not. Aren't you Asian.... Oh wait

    • Slimy Demon
      Slimy Demon 4 hours ago

      +Fire Power701 okay, never gonna use it then

    • Fire Power701
      Fire Power701 4 hours ago

      Slimy Demon They must be genetically modified to kill the weeb inside people and then maybe it will be in full scale use

  • Arturo Malapit
    Arturo Malapit Day ago

    5:03 thats some nice transformation animation

  • Samuel R Kruse
    Samuel R Kruse Day ago


  • Agent gaming Official

    There were like no birds in the vid

  • Bear_the_ Wolf_
    Bear_the_ Wolf_ Day ago

    Sadly enough I can’t even have penicillin because I’m allergic

  • De Wae
    De Wae Day ago

    steven universe reference?

  • EddieWFR
    EddieWFR Day ago

    Haven't russia been doing this for the last 50 years? Where we chose anti-bac, russia chose to focus more on phage's?

  • PeterWasHere
    PeterWasHere Day ago

    The bacteriapahges are like thanks snapping his fingers

  • x Adiquite
    x Adiquite 2 days ago

    Wait if we have an immunity to the deadliest being on the planet doesn’t that make *us* the deadliest being on the planet

  • Alex's Garage
    Alex's Garage 2 days ago

    Fuck it...

    Bacteriophage time

  • Dınø satay
    Dınø satay 2 days ago

    I see one problem with this, can the phages evolve to consume the most abundent cell once injected by which would be the human cell?

  • Kickmaster06
    Kickmaster06 2 days ago

    The problem is, I’m allergic to penicillin.

  • Evan Gerarcas
    Evan Gerarcas 2 days ago

    Save millions of lives even cancer?
    If you said yes I am gonna be a scientist to find a cure for cancer but...
    If you said no RIP DREAMS

  • Gaymer
    Gaymer 2 days ago

    Aren't those the things they use to make gems in SU?

  • Rainbow Gamez
    Rainbow Gamez 2 days ago

    if we do it right the infection killer wont kill us and we dont kill them sooo it could work out for us

  • Chianna Morris
    Chianna Morris 2 days ago


  • CheeseNuts
    CheeseNuts 2 days ago

    And In a few thousand years they will be a part of our body and most like become a new type of blood cell...

  • Ethan Metcalf
    Ethan Metcalf 2 days ago

    You know, it's really refreshing to watch a USclip video that's not some annoying guy screaming and filling people's heads with obvious lies.

  • Ethan Metcalf
    Ethan Metcalf 2 days ago

    1:50 to 2:10 sounds a lot like sexual assault.

  • L Nightcore
    L Nightcore 2 days ago

    What about white blood cells?

  • lemoisten SUCC
    lemoisten SUCC 2 days ago

    5:00 - 5:24 I wonder if there is a game like that.

  • Shooting Scar
    Shooting Scar 2 days ago

    (Bacteriophage [Phage] and Human Cell [Cell] meet)
    Phage: YOU CAN'T ESCAPE ME THIS TIME, YELLOW! (Continues chase on a fleeing Yellow Fever virus and bumps into Cell)
    Phage: Ohhhh, you've DONE it now! COME HERE BOY!
    Cell: No! Please! I never do anything wrong! (Cries)
    Phage: (Sniff) I'm sorry :( I didn't mean to upset you. Can I help? I can try to defend you.
    Cell: That guy over there wants to hurt me (Points to Ebola virus).
    Phage: Ok, hold on.
    (Phage charges at Ebola)
    Ebola: Yeah right, gay! You would never-
    (Phage inserts needle and injects the components of Bacteriophage into Ebola)
    (Ebola bursts open and dies)
    Phage: Better now?
    Cell: Death, no death. Cell does not want to die, Cell will not die. Cell will not die today. Cell is forever free from age, Cell does not want to-
    Phage: Well say goodbye to our host. I'm leaving this organ. You can stay and get surgically removed, wierdo.
    Cell: CELL WILL NOT-
    (Lung gets removed right as Phage crosses to the next)
    Phage: Human Cells are so wierd. I'm not even gonna bother with them.

    • Shooting Scar
      Shooting Scar 2 days ago

      That was way longer than I thought. Im late on this video anyway.

  • Keller Skoglund
    Keller Skoglund 2 days ago

    a big fat yes

  • ScratchGamingYT
    ScratchGamingYT 2 days ago

    Very nice

  • Zach Bishop
    Zach Bishop 2 days ago

    Fages are cool

    SIDESILVER 2 days ago

    White blood cell "were completely serounded
    Stem cell" good by cruel world"
    Red blood cell "incoming phage strike" BOOM

  • Sir. Luiwolf
    Sir. Luiwolf 2 days ago

    When you overdose medicine 3:23

  • Isadjdnndnd
    Isadjdnndnd 2 days ago

    The bacteriophage looks like a robot.

  • AlexHD 1
    AlexHD 1 2 days ago

    Today's lesson on biology

  • L Waugh
    L Waugh 2 days ago

    We should love these little robot-like beings. They must be our new SUPERWEAPON!

  • Abner Schmidt
    Abner Schmidt 2 days ago

    Big pharma isn't interested in it because it cures. There's more money to be made in treating people for long periods of time.

    • Yen
      Yen 2 days ago

      what a world we live in..


    *phages grab weapons* bacteria:Oh no

  • g eggy
    g eggy 2 days ago

    This channel is awesome imma show this to my science teacher

  • Niklas Felk
    Niklas Felk 2 days ago

    I'm not a biologist or stuff like that but what would Happen it the Phage would turn against US and Attack Human cells because theres More of them inside us (that's Logical but nevermind)

  • Hunters vlogging and more

    Could this be the cure for Cancer tho?

  • Tony Zeng
    Tony Zeng 3 days ago

    The superman of nature

  • Ayano does gacha
    Ayano does gacha 3 days ago

    Wait.....I still don't get it

  • Rich 91
    Rich 91 3 days ago

    SO why dont funghi evolve to kill resistant bacteria?

  • Clorox Bleach iP
    Clorox Bleach iP 3 days ago

    But sadly it can't kill viruses...

  • Hawwin Nuryaqin
    Hawwin Nuryaqin 3 days ago

    and someday humans will become immortal

  • kyle Jones
    kyle Jones 3 days ago

    It's crazy to think that they are like at a constant war.. Every day whole we eat sleep and shit lol crazy how our body's work tbh

  • nuclearthreat545
    nuclearthreat545 3 days ago +1


  • Nate Gough
    Nate Gough 3 days ago

    This video is *L I T* science

  • Eric Leal
    Eric Leal 3 days ago

    Who else got the reference here? 4:43 From the game Worms

  • Dillon Gamer
    Dillon Gamer 3 days ago

    phages: exist
    bacteria niggas: Oof

  • Donzoao VI
    Donzoao VI 3 days ago

    Then a single phage will mutate to harm our cells and boom zombie apocalypse

  • Mooplex 1412
    Mooplex 1412 3 days ago

    I love these things

  • Brendan West
    Brendan West 3 days ago

    Congrats, you have a new subscriber 🙂

  • Marino Z
    Marino Z 3 days ago

    But what if they dont have anymore food (bad bacteria) and they start eating good one ?

  • Hyprex
    Hyprex 3 days ago

    4:44 Worms

  • Adam Esmat
    Adam Esmat 3 days ago

    if anyone has a phone number to phages tell em':
    ey phage species we have gourmet food for ya' so cmon and get it also we are a nice home but pls dont kill us

  • Jiraiya500
    Jiraiya500 3 days ago

    But what if the phages evolve to utilize human cells???

    DOGE COOOL 3 days ago

    oh boy!

  • Batmed XL
    Batmed XL 4 days ago

    6:49 ... human lives ...

  • Gg Daily
    Gg Daily 4 days ago

    Well this restored my faith in bacteria

  • Trumble Research
    Trumble Research 4 days ago

    Ok everything was ok until the plot twist. FUNDED BY BILL AND MELINDA GATES (cue creepy music). The family who openly support eugenics, or commonly referred to as population control. What’s the play I ask? It’s a damn Mexican standoff

  • JuicyStuff
    JuicyStuff 4 days ago

    Just imagine if in a few years it mutates and will be able to kill humans... People in the future would be like "you stupid farts don't know anything!"

  • Tra Nguyen
    Tra Nguyen 4 days ago

    4:39 problem?
    Trollface reference

  • I play Minecraft
    I play Minecraft 4 days ago

    These videos are soo cool with all the smooth editing !

  • Heru Prasetyo
    Heru Prasetyo 4 days ago

    LMAO this 05:11 generic scream is everywhere

    THINK DIFFERENTLY 4 days ago

    Here after Nobel prize in chem 2018 , that was based on this.

  • nyet Blue
    nyet Blue 4 days ago

    5:12 I heard that lmao

  • Emperor
    Emperor 4 days ago

    so I could build a genocid weapon in my back yard to eliminate human race?

  • Iama Germani
    Iama Germani 4 days ago


  • Titan06
    Titan06 4 days ago

    saw that this vid is from bill gates

  • Ji Akira
    Ji Akira 4 days ago

    this video changed my whole mood, 😭 i feel so vulnerable

  • Mr. Noob
    Mr. Noob 4 days ago

    Finnaly the most powerful thing in the world is our ally

  • Ihee Boom
    Ihee Boom 4 days ago

    5:12 listen closely

  • Meme Library
    Meme Library 4 days ago


  • Savvas Vaggelis
    Savvas Vaggelis 4 days ago

    no that is the phantom ruby XD

  • Joseph Wise
    Joseph Wise 4 days ago

    Does anyone know where I can find the sources used to back this video? I'd love to learn more about the studies that were done to show that phage resistance can lead to loss of antibiotic resistance. Thanks!

  • Misha Hashmi
    Misha Hashmi 4 days ago

    but wouldn't it stop the phage reproduction since they needbacteria to grow on?

  • Vivek Kumar
    Vivek Kumar 5 days ago

    If phages lived before every organism including bacteria, how can they reproduce because bacteriophage complete their life cycles by bacteria(Injecting RNA/DNA in bacteria, destroying it and releasing new phages)

  • yume mirai
    yume mirai 5 days ago

    This channel always gives me the chills from awe at the grandeur of nature.

  • Butch Cassidy
    Butch Cassidy 5 days ago

    I dont know If its Fake or not