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 • 21 321

  • Kurzgesagt – In a Nutshell

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

    • malik Videos
      malik Videos 7 hours ago


    • Rohit Ahir
      Rohit Ahir 9 hours ago

      Maestrul Gamer HIV is also phase n it attacks on human cell .yaaa it's bigger problem.

    • Gaurav Kant
      Gaurav Kant 16 hours ago

      Video on gravity please

  • Dylan Lodge
    Dylan Lodge 5 hours ago


  • Randomness 2018
    Randomness 2018 5 hours ago

    Beware for SU fans saying that the bacteriophage is the drill for gems

  • Sarcasmal
    Sarcasmal 5 hours ago

    Nature: Hey, humanity, I've found a way to kill you! This time for real!
    Humanity: Hold our 7.8 billion beers.

  • Ugandan Knuckles
    Ugandan Knuckles 5 hours ago


  • TJx Gaming
    TJx Gaming 5 hours ago

    This reminds me of spike vipers war on half the world.... They would get stronger and he would just nuke them...

  • Usernames are so overrated


  • Waffle Iron Steakhouse

    I hope hospitals watch this stuff. Its super useful to prevent a few deaths. Are you a doctor or just a smart person?

  • Anthony Cintron
    Anthony Cintron 6 hours ago +1

    First I was scared but now I'm curious.

  • JJake9000 Plays
    JJake9000 Plays 6 hours ago

    the thing is, what is they evolve to harm human cells?
    then, they could easily kill us as we already injecting them into our bodies.

  • AlphaAmoeba
    AlphaAmoeba 6 hours ago

    They are kinda cute

  • Zeö .770
    Zeö .770 6 hours ago

    Could you guys please do a video on cryptocurrency, it's pros & cons and it's potential success/failure in the future.

  • Trick Shot
    Trick Shot 7 hours ago

    Oh wait, there is an autopilot. WAAAAAIIIT!!!, NEVER MIND I WANTED TO SACRIFICE MYSELF ANYWAY!!!

  • Clifford Newman
    Clifford Newman 7 hours ago


  • 조유준
    조유준 7 hours ago

    늘 감사합니다. 한국에서 보고있어요

  • Hernancito Arias
    Hernancito Arias 7 hours ago

    i thought the most dangerous thing that ever was on earth was the Indorapter

  • jonathanty _06
    jonathanty _06 7 hours ago

    Bacteria: im finally stronger than antibiotics
    Phages: think again
    Bacteria: nooooooooooo

  • Nutella Vlogs
    Nutella Vlogs 8 hours ago

    So phages our friends? COOL!

  • StarTrust
    StarTrust 8 hours ago

    this gave me a new fear and cleared that fear a minute later thank you... :P

  • Rafael Roxas
    Rafael Roxas 8 hours ago +1

    Hi Kursgesagt! I've been following your channel ever since your first video came out :) I just want to ask if you could also make videos about cryptocurrencies? (eg. ethereum, bitcoin etc). Thanks a lot and great video as always!!

  • TheProGaming717 DeMoss


    throw the PHAAAAAAGE!!!!!!!!!!!
    (someone gets a free cookie if they get the reference)

  • Grzegorz Fabjanowski
    Grzegorz Fabjanowski 9 hours ago +2

    Sooo if they kill all of the bacteria, how do they get out? I don't want a hole in my eye or something :/

  • Kosh Marasco
    Kosh Marasco 9 hours ago

    This was kind of boring in regards to your normal great stuff.

  • 54bigchris
    54bigchris 9 hours ago

    Phages are our saviour

  • Shpagel TheDuck
    Shpagel TheDuck 9 hours ago

    Is it possible to maybe in the future create a artificial nano-phage that could kill cancer?

  • Skeletal Dragonz Studios


  • zero wins
    zero wins 10 hours ago

    It looks like the thing in Steven Universe

  • Sean Glover
    Sean Glover 10 hours ago

    so educational. on of the best science vids yet

    JAKE THE SPARTN 10 hours ago +1

    Hey Kurzgesagt - In a Nutshell. I just watched your GMO video which raised an interesting field of study into mind. What about AQUAPONICS??? Its a New and versatile way of growing crops in a short confined space. If you can make a video on this, many people will very much appreciate you more!

  • Kerzid
    Kerzid 10 hours ago

    Thats what I said, sodium chloride.

  • Grox Fan
    Grox Fan 11 hours ago

    When i first heard "Millions of phages are in your hands and eyelids" i started cleaning my eyelids because of that.

  • isa4321
    isa4321 11 hours ago

    Can you explain the dimensions?

  • Ed Thurber
    Ed Thurber 11 hours ago

    I may be wrong, but I’ve read that phage therapy is nothing new. Russia and other countries have been doing it for decades. The reason that we (in the US) are just looking at it now is because the pharmaceutical companies have manipulated the FDA squash it. You can’t patent a phage and it’s in direct competition with their products.

  • Mike GamingRoblox
    Mike GamingRoblox 11 hours ago +1


  • Mike GamingRoblox
    Mike GamingRoblox 11 hours ago


  • Graeme Cox
    Graeme Cox 12 hours ago


  • chanakya jha
    chanakya jha 12 hours ago

    What happens if phages gets so immune that they start hunting human cells like once they are injected in the body and after they kill all the bacteria there will be no food other than human cells so will evolve over time in a such a way that they start feeding on human cells?????

  • Gabriel Garcia
    Gabriel Garcia 12 hours ago

    Make a video about virus in plants

  • fulcrum 29
    fulcrum 29 13 hours ago


  • Abdullah Almuhanna
    Abdullah Almuhanna 13 hours ago

    U frightening us

  • margus saravada
    margus saravada 13 hours ago

    next zombie movie idea ?

  • Ronin Yama
    Ronin Yama 13 hours ago


  • arithmetisches Mittel
    arithmetisches Mittel 14 hours ago

    Worms and Wilhelm scream, love it :D

  • dragonfistbs
    dragonfistbs 14 hours ago

    stop sending antibiotics to undeveloped countries and we will be able to use them for much longer

  • Luis E Morales Falcon
    Luis E Morales Falcon 14 hours ago

    This requires good planning.

  • Abel Aguiar
    Abel Aguiar 14 hours ago

    If bacteria evolve to survive Antibiotics, wouldn't our bodies evolve to survive bacteria also?

  • Abel Aguiar
    Abel Aguiar 14 hours ago

    But, if the bad bacteria evolve to survive antibiotics, why don't the nice ones also do?

  • Anakin Skywalker
    Anakin Skywalker 14 hours ago

    When you realize that the channel's name is "In short in a nut shell"

  • Kokichi_X -A-
    Kokichi_X -A- 14 hours ago

    Steven Universe fans think otherwise.

  • Miroslav Ďurian
    Miroslav Ďurian 14 hours ago

    This is disgusting! Looking pretty and usefull, but hiding eugenics and killing people that doesn't fill someones needs. I am shocked! That miriads of hidden deaths that this "bright future" envisions, is devastating. Do we ever stop playing gods?

  • Merendino666
    Merendino666 14 hours ago

    The Worms homages were on point.

  • Random Derpy Family
    Random Derpy Family 14 hours ago

    Da war !!!!

  • J OE
    J OE 15 hours ago

    That actually sounds very great

  • Ryan Cousins
    Ryan Cousins 15 hours ago

    Could bacteriophage kill diseases or cancer? If so, why dont we look at this as an alternate medicine for curing HIV or Cancers? If its as easy as giving the phage antibiotics to kill find the bacteria that is immune to it. Then I would think it would be as easy as giving the Phage HIV or the Cancer cell that is killing the body?

  • Luxai
    Luxai 15 hours ago


  • Nightset
    Nightset 15 hours ago

    My logic (before watching this video) Don't inject viruses into your body while you are sick
    My logic (after watching this video) INJECT DA VIRUSES

  • vapandris _
    vapandris _ 15 hours ago

    Hold on for a sec! Couldn't we kill cancer cells this way??
    That'd be cool. :D

  • Kenji Dayan
    Kenji Dayan 15 hours ago

    Why do I feel like that the micro verse is the greatest battle royale game first the immune system now this.

  • Bhuvanesh s.k
    Bhuvanesh s.k 15 hours ago

    Deadly indeed.... Reminds me of thoz tripods frm war of the world....

  • Tufail Khalo
    Tufail Khalo 16 hours ago

    Wait, injecting virus into human bodies, and the video funded by Bill and Melinda Gates Foundation. Suspicious

  • Coen Moore
    Coen Moore 16 hours ago

    Every video im blown away, so gooodd

  • Tufail Khalo
    Tufail Khalo 16 hours ago

    One big phage: *ISRAEL*

  • mad lime
    mad lime 16 hours ago


  • BO SS
    BO SS 16 hours ago


  • ThatAngelDoggo
    ThatAngelDoggo 16 hours ago

    What the f-

  • john cataluna gaming
    john cataluna gaming 16 hours ago

    woah its like a hybrid scorpion but deadly...

  • Arda Erdogan
    Arda Erdogan 16 hours ago

    Why he has an german name when he makes english videos?

  • Jay Vee
    Jay Vee 16 hours ago

    Uh what. After the antibiotics/antibodies invade us and die, they only experienced the antibiotics once. If the same bacteria invades, they will die to the antibodies. Thus, they only get antibiotics once.

  • victor noagbodji
    victor noagbodji 16 hours ago

    so #1 and #2 are ganging up against #3? that's kinda cheating no?

  • Labrek Studios inc
    Labrek Studios inc 16 hours ago

    Clever idea... just one issue...
    How exactly do we find out which phage kills what? We dont want to accidently inject phages that are designed to kill the good bacteria!

  • Eduardo Jose Jumawan
    Eduardo Jose Jumawan 17 hours ago +2

    This phages looks pretty similar like the ones on Jimmy Neutron (don't know the episode name) where carl was sick and was needed to go through his body to remove something ( I clearly forgot but I definitely remember those shapes ).

    POTATO PATATO 17 hours ago

    So we are in a kind of tribe with phages? Another high up food chain? Super cool

  • Luna-Ichigo
    Luna-Ichigo 17 hours ago

    I just want to ask why is your channel name partly in german?
    And I love your videos!

  • Technovir
    Technovir 17 hours ago

    They're untouchable

  • Rick Sanchez
    Rick Sanchez 17 hours ago

    This video have enough potential to become next killer game app

  • Quackingnight -oinkpoink

    Pls do a video on quantum gravity

  • Silas Peddle 82 (STUDENT)


  • jast a blu wulv
    jast a blu wulv 18 hours ago

    Can't wait for the new Phages vs Bacteria game XD

  • king robert zarate
    king robert zarate 18 hours ago


  • CeilloNoll
    CeilloNoll 18 hours ago

    This video sounds like a tv advertisement which you see on a cracked tv set in post apocalyptic world where something went wrong.

  • Asad sammo
    Asad sammo 19 hours ago

    It is a a nice alternate but would it really be a good idea in the long run?? lets say when the amount of bad bacteria will be reduced and battle for existence will fall upon those phases. isn't there a risk of them evolving to attack human cells ?

  • Manish Jung Kunwar
    Manish Jung Kunwar 20 hours ago

    Humm, won't the phases get to that point where they can also destroy human cells?

  • SmirkEx
    SmirkEx 20 hours ago

    Phages For president!

  • Tony
    Tony 20 hours ago +1

    but what will happen if the virus evolve and be like "mhmmm i will try to change my menu today this good bacteria *also* looks delicious" than we will have like a super virus who eats everything?

  • Gopika Reji
    Gopika Reji 21 hour ago

    You! You did it again Kurzgesagt! And watching one of your videos is like watching a full-fledged sci-fi movie except for the fact that it is actually science!💜

  • cloud13
    cloud13 21 hour ago

    Now I just need to learn how to swallow a pill

  • Thomas Bonnet
    Thomas Bonnet 22 hours ago

    je suis vraiment impressionnais par cette video et le concept ma l'air vraiment intéressant je pense que expérimentation devrais continuer et s'intensifier pour que le projet puisse aboutir au plus vite et qu'il soit au point à 100%

  • Thomas Bonnet
    Thomas Bonnet 22 hours ago

    i'm realy impress by this video the concept is very great and we can belive to this project.

  • Erich Isnain
    Erich Isnain 22 hours ago

    Maybe helpfull but is still risky since there so many possibilities that something bad can occur.
    But still CURIOUS😮😯

  • xX Ponyo
    xX Ponyo 22 hours ago +1

    Just wait till they Execute Order 66 and attack us.

  • Hamzah Daud
    Hamzah Daud 22 hours ago

    what video making software do you use

  • Conflip 2/3
    Conflip 2/3 22 hours ago

    So wait, could super bugs still negatively affect people who don't use antibiotics for less serious causes?

  • TheGrandMaster110
    TheGrandMaster110 22 hours ago


  • phoenix55755
    phoenix55755 23 hours ago

    It is not unlike using a pests natural predator to get rif of it. Seems like a good idea.

  • Yalkın ÇIRAK
    Yalkın ÇIRAK 23 hours ago

    Ahh, that iconic spider looking virus

  • Zee A
    Zee A Day ago

    There will be a time when our creations will kill us all XD

  • にゃあエイリアンMeowAlien

    The animation is insanely good, it feels like it is improving and getting better and better! Good work

  • Zachary Kahlenberg

    Please do a video on YELLOWSTONE

  • im jung SHOOKED
    im jung SHOOKED Day ago


  • Pham-Ngoc Hanh
    Pham-Ngoc Hanh Day ago

    If you speak the superbugs are in your mouth JK XD