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 • 27 867

  • Kurzgesagt – In a Nutshell
    Kurzgesagt – In a Nutshell  5 months ago +6643

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

    • Mostafa kamel
      Mostafa kamel 22 days ago

      do phages kill good bacteria

    • I drink bleach
      I drink bleach 23 days ago

      Can they kill immune cells?

    • Tim 74
      Tim 74 27 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 ?

  • Nadiel101 :3
    Nadiel101 :3 4 hours ago

    I just got this random thing in my head when I saw this
    I think it should be a game called phage vs super bacteria

  • Vojta Jozek
    Vojta Jozek 6 hours ago

    This is very good series better than others

  • Esteban Gonzalez
    Esteban Gonzalez 6 hours ago

    What happens If the virus mutates an begins to infect us Lol

  • Kanikorn Pongsates
    Kanikorn Pongsates 6 hours ago

    so is good or bed?

  • Box Girl
    Box Girl 7 hours ago

    "We still might be able to win" "INGECT MORE"

  • m i n e
    m i n e 8 hours ago

    I believe in 2050, we will be about ten times stronger than phages

  • chinnu bannu
    chinnu bannu 10 hours ago

    They are not harming US they kill harmful

  • David Steel
    David Steel 11 hours ago

    A big problem is that pharmaceutical companies would find it more difficult to profit from these because intellectual property around infection-specific phages is not as straight-forward as antibiotics. I'm not sure if this would therefore be the right place for government-funded development instead.

  • dragoknight 0508
    dragoknight 0508 11 hours ago

    Oh yes so very good i shall call the army of phages HAIL HYDRA!!!!!!!

  • Tobi /Obito Uchiha
    Tobi /Obito Uchiha 12 hours ago

    *world war cells*

  • Cat Courageous
    Cat Courageous 16 hours ago

    I bet my friend is like, OMG SHES WATCHING A VIDEO ABOUT ME

  • MeMeLord
    MeMeLord 16 hours ago


  • Atomas's Galaxy
    Atomas's Galaxy 18 hours ago

    Trick Question #1:

  • FrostyTheDark
    FrostyTheDark 19 hours ago


  • SUN Family
    SUN Family 19 hours ago


  • Nightamations
    Nightamations 20 hours ago +1

    holy shit. what if bacteria phages were about the size of dogs. they can terrafuck us all to our fuckin' graves

  • daoisa
    daoisa 20 hours ago

    5:58 they can even survive an alcoholic handjob

  • Shatugi - Sama
    Shatugi - Sama 22 hours ago

    This is world war 2. The bacteria is the nazis and the antibodies, Bacteriophages, and humans were the allies

  • Alvi Haque
    Alvi Haque 22 hours ago

    biggest save ever
    i thought we dead for sure from superbugs

  • PUBGM Man
    PUBGM Man Day ago

    it’s basically the White Blood Cell Of Our Outside Body?

  • StCreed
    StCreed Day ago

    "we used antibiotics more and more..." - no, agriculture used it more and more on cattle to increase their growth rate. This is where most of the cases of resistant bacteria in Holland come from. Another source are populations with ready access to antibiotics without a doctor's prescription. A lot of countries including the USA and the countries in southern Europe are in this range. They create their own problems. Russia creates even worse problems for itself by having prison populations that are both overcrowded, get *some* medication but not enough. Resistant tuberculosis is a real risk inside Russian prisons. Don't get me started on South America. And the fools that think "oh, it's just prisoners..." - well, they do get out at some point and then infect the general population.
    Having good healthcare was created by people who didn't like dying from poor people's plagues. Apparently, that lesson is forgotten. And pharma has no reason to reminds us of it, as the antibiotics sold to agriculture and humans alike create massive profits. But IMO, they should be reserved for cases where a test confirms a bacterial infection, and nothing else.

    HYEOL Day ago

    5:12 *Wilhelms Scream* . Get out xD

  • erotic gamer22
    erotic gamer22 Day ago

    Bacteria Hitler

  • Oliver Perrin
    Oliver Perrin Day ago

    So phages, in some extreme cases, can be (theoretically) destroy cancer cells, etc

  • Bijay Kumar Sharma

    Bacteriophage are great

  • Littly Shippy
    Littly Shippy Day ago

    So ww1 happened billions of years ago when Bacteriophages were deadlier than humans

  • Adonan the Stoic

    5:11 Bacterihelm scream

  • Jeremiah Taala
    Jeremiah Taala Day 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 Day ago

    This video helped me learn

  • Lodi petmalu Tutong

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

  • Blissfully Ignorant

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

  • datTweenlife
    datTweenlife Day ago

    Jim get the phage nuke ready,were killing Ebola

  • Ian B
    Ian B Day ago

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

  • User Library76
    User Library76 Day ago

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

  • Johnathan short
    Johnathan short Day 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 2 days ago +1

    Nice worms reference. :P

  • Hyper Squrle3
    Hyper Squrle3 2 days ago

    Some forward this to the president ASAP

  • BARTYB 2000
    BARTYB 2000 2 days ago

    Can bacteriophage defeat gonnorhea

  • me like tea
    me like tea 2 days ago +2

    ty phages 💕

  • Dante Rombouts
    Dante Rombouts 2 days ago

    1:12 genocide for breakfast

  • InTo ReKa
    InTo ReKa 2 days ago


  • Alduin Hearth
    Alduin Hearth 2 days ago

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

  • Aang An
    Aang An 2 days 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 2 days ago

    Hope this is able to kill diseases like AIDS

  • Zekaia
    Zekaia 2 days ago

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

  • VeRsaCEoN ThEflOOR
    VeRsaCEoN ThEflOOR 2 days ago

    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 2 days ago

    MMM, genocide for breakfast.

  • Matt Lawrence Marquez

    2:16 In the final step they produce Pacman boiii

  • MC hacker
    MC hacker 2 days 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 2 days ago +2

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

    • Fire Power701
      Fire Power701 Day ago

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

    • Slimy Demon
      Slimy Demon Day ago

      +Fire Power701 okay, never gonna use it then

    • Fire Power701
      Fire Power701 Day 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 2 days ago

    5:03 thats some nice transformation animation

  • Samuel R Kruse
    Samuel R Kruse 2 days ago


  • Agent gaming Official

    There were like no birds in the vid

  • Bear_the_ Wolf_
    Bear_the_ Wolf_ 2 days ago

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

  • De Wae
    De Wae 2 days ago

    steven universe reference?

  • EddieWFR
    EddieWFR 3 days 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 3 days ago

    The bacteriapahges are like thanks snapping his fingers

  • x Adiquite
    x Adiquite 3 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 3 days ago

    Fuck it...

    Bacteriophage time

  • Dınø satay
    Dınø satay 3 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 3 days ago

    The problem is, I’m allergic to penicillin.

  • Evan Gerarcas
    Evan Gerarcas 3 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 3 days ago

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

  • Rainbow Gamez
    Rainbow Gamez 3 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 3 days ago


  • CheeseNuts
    CheeseNuts 3 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 3 days ago

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

  • Ethan Metcalf
    Ethan Metcalf 3 days ago

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

  • L Nightcore
    L Nightcore 3 days ago

    What about white blood cells?

  • lemoisten SUCC
    lemoisten SUCC 3 days ago

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

  • Shooting Scar
    Shooting Scar 3 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 3 days ago

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

  • Keller Skoglund
    Keller Skoglund 3 days ago

    a big fat yes

  • ScratchGamingYT
    ScratchGamingYT 3 days ago

    Very nice

  • Zach Bishop
    Zach Bishop 3 days ago

    Fages are cool

    SIDESILVER 3 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 4 days ago

    When you overdose medicine 3:23

  • Isadjdnndnd
    Isadjdnndnd 4 days ago

    The bacteriophage looks like a robot.

  • AlexHD 1
    AlexHD 1 4 days ago

    Today's lesson on biology

  • L Waugh
    L Waugh 4 days ago

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

  • Abner Schmidt
    Abner Schmidt 4 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 3 days ago

      what a world we live in..


    *phages grab weapons* bacteria:Oh no

  • g eggy
    g eggy 4 days ago

    This channel is awesome imma show this to my science teacher

  • Niklas Felk
    Niklas Felk 4 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 4 days ago

    The superman of nature

  • Ayano does gacha
    Ayano does gacha 4 days ago

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

  • Rich 91
    Rich 91 4 days ago

    SO why dont funghi evolve to kill resistant bacteria?

  • Clorox Bleach iP
    Clorox Bleach iP 4 days ago

    But sadly it can't kill viruses...

  • Hawwin Nuryaqin
    Hawwin Nuryaqin 4 days ago

    and someday humans will become immortal

  • kyle Jones
    kyle Jones 4 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 4 days ago +1


  • Nate Gough
    Nate Gough 4 days ago

    This video is *L I T* science

  • Eric Leal
    Eric Leal 4 days ago

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

  • Dillon Gamer
    Dillon Gamer 4 days ago

    phages: exist
    bacteria niggas: Oof

  • Donzoao VI
    Donzoao VI 4 days ago

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

  • Mooplex 1412
    Mooplex 1412 4 days ago

    I love these things

  • Brendan West
    Brendan West 5 days ago

    Congrats, you have a new subscriber 🙂

  • Marino Z
    Marino Z 5 days ago

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