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 • 26 545

  • Kurzgesagt – In a Nutshell
    Kurzgesagt – In a Nutshell  3 months ago +6269

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

    • Gabrielt Augusto
      Gabrielt Augusto 2 days ago +1

      Please, do a video about rabies and tuberculosis vaccines!🙏🙏🙏

    • Don’t Mind me
      Don’t Mind me 9 days ago

      4:41 are super smash bros,right?

    • Jay Pond
      Jay Pond 16 days ago

      I wonder why we didnt start using phages to fight off bacteria to begin with

    • jin liu
      jin liu 17 days ago


    • Aziz Kassem
      Aziz Kassem 20 days ago


  • anne bel
    anne bel Hour ago

    It looks like a virus from Jimmy Neutron.

  • ITube You
    ITube You Hour ago

    Is kurzgesagt a German Channel?

  • Jose M Rico
    Jose M Rico 2 hours ago

    One subtle Wilhelm scream 5:12

  • the gamer BR
    the gamer BR 4 hours ago

    alien 1: guys look at this planet is full of bones and a strange type of microscopic life.
    alien 2:what caused the death of that many creatures ?
    alien 1:whe will never know.

  • Parata567
    Parata567 10 hours ago

    Lol I have to write a research paper on this

  • Arthur BR1720
    Arthur BR1720 12 hours ago +1

    Phages are Good Guys!

  • El gamer Rarito
    El gamer Rarito 12 hours ago

    I imagine that thing in a dalek tank

  • 米特巴爾
    米特巴爾 13 hours ago


  • Stephen Gomez
    Stephen Gomez 15 hours ago

    It's a shame that in the U.S. bacteria phage was discarded. 100+ years of research and use to cure people of bacterial infections such as Lyme disease. Currently only three places I know of continued advancing the use of phage. Poland, Russia and either Georgia or Ukraine I believe. It's sad that the most advanced country on earth gave up on its use and know we are so far behind in the use and knowledge about phages. Now we will have to have yeats research then probably several more years for it to be approved by the FDA for human use.

  • not edgy
    not edgy 16 hours ago

    Insert the deadliest being on earth into your blood. Very edgy. (Gr8 video tho ;))

  • Tai Gerren
    Tai Gerren 20 hours ago

    My girl phage gonna hook me up

  • T Rex
    T Rex 21 hour ago


  • High On Crack
    High On Crack 21 hour ago

    Satan: God ... one question
    God: Yes ?
    Satan: Can bacteria get sick ?
    God: Hm I don’t know WAIT that gives me an idea ::::::))))))))

  • ItzYoshinon [60Hz]
    ItzYoshinon [60Hz] 22 hours ago

    Oddly Horror

  • RexBlade Plays
    RexBlade Plays 23 hours ago

    If the phages can evolve then doesn’t that mean they could evolve to kill us?

  • Testor Trapzz
    Testor Trapzz 23 hours ago

    I want all kinds of Phages in my body now...
    But, how do we battle viruses like E-bola? Is there a special kind of bacteria or fungus or something that can help us battle them? Because obviously, Phages can’t target other viruses.

  • BlazingCatz
    BlazingCatz 23 hours ago


  • Minh Nguyen
    Minh Nguyen Day ago

    So... what if phages evolve through a point where it can break human cell??


    Algum BR

    REXTHEKIDRS 344 Day ago

    How can a bacteria vomit if it does not have a mouth. Illuminati confirmed

  • Tamara Zdihan
    Tamara Zdihan Day ago

    This sounds like it would be good enough to kill cancer. Doubt it tho. Just an idea

  • KonohasEdge
    KonohasEdge Day ago


  • Phillip Grosse Siestrup

    wilhelm scream at 5:12 :)

  • Lina Meisse
    Lina Meisse Day ago


  • Mav Mav
    Mav Mav Day ago

    Now, Inject me some Phages

  • Viola Frey
    Viola Frey Day ago

    But what if the Phages were to evolve in way, they would attack our cells instead of the bacteria? Is it possible?

  • VItaNel
    VItaNel Day ago

    So the thought of injecting a virus in to the body is a thought I'm just a little bit torn about. After all antibiotics had their flaws and overall long term consequences, like every time mankind "masses" with nature but may it be just irrational fear. At least it seems that we have no other choice. But it is interesting that bacteriophages looks like they were designed...
    Maybe that could be an interesting video topic...

  • 168TeeJay
    168TeeJay Day ago

    Guys this is serious

  • `
    ` Day ago

    Well now i'm terrified to even exist. I will still be alive in 2050, and it won't be the best feeling of alive, I will be old and even MORE open to these SUPERBUGS. Can someone please give me a good reason to not freak out so badly?

    • Lord Hodor
      Lord Hodor 23 hours ago

      ww3 is going to happen much sooner, and we'll all be dead by 2050. Are you more relaxed now?

  • Sandesh Pandey
    Sandesh Pandey Day ago

    Well time to pray phages....

  • Meimotalu Rinkajiku
    Meimotalu Rinkajiku 2 days ago

    A virus that parasites bacterium by infecting and reproducing inside it. 🐺

  • Naufal Is
    Naufal Is 2 days ago

    I love phages

  • MemeMaker
    MemeMaker 2 days ago

    Make this man a president

  • Mist Y
    Mist Y 2 days ago

    5:12 scream.jpeg

  • Dark Kitty
    Dark Kitty 2 days ago

    Now i want that virus with a AK47 in my body
    I will feel protected

  • WWII Infantry Fan
    WWII Infantry Fan 2 days ago

    Can I go to Canada now plz?

  • Mark Joseph Anog
    Mark Joseph Anog 2 days ago

    Oh my god i thought they were so dangerous

  • Cameron Vlogs
    Cameron Vlogs 2 days ago

    Human:Allright Yall Know The Drill
    Bacteriophage:Sir Yes Sir!!!!
    Bacteria:We Done Goofed

  • Eapple Gamerz
    Eapple Gamerz 2 days ago +1

    4:38 Canadian bacteriophage

    MDC CRAFTIANS 2 days ago

    Can phases kill cancer

  • 錢珩
    錢珩 2 days ago


  • bobbymonboy
    bobbymonboy 2 days ago

    But is there any possible way that bacteriophages could evolve to target human cells? That'd cause some issues...

  • Jinxed Pain
    Jinxed Pain 2 days ago

    5:12 That Sound Effect 😂

  • Snowywaterz
    Snowywaterz 2 days ago

    Steven Universe?

  • David Csiki
    David Csiki 3 days ago

    I feel like our imune system is made in china👎

  • David Csiki
    David Csiki 3 days ago

    Imune System overwhelmed! BRING IN HARD ARTILERY! PHAGES FOR VICTORY!!!

  • UltraTailsGamer
    UltraTailsGamer 3 days ago

    Who thinks the "head" looks like to phantom ruby in sonic mania

  • Danimates
    Danimates 3 days ago

    It’s funny how humans get smarter but smaller beings like bacterias are even smarter than us...

  • Roemon Christian
    Roemon Christian 3 days ago +1


  • Charlie Butler
    Charlie Butler 3 days ago +1

    0:05 when you burst a cheesy macaroni piece

  • Mads Vetle Agerup Myhr

    @Kurzgesagt Will not the virus evolve to attack human cells?! Please answer

  • minecraft_player game developed by: Mojang

    Maybe we can help them mutant to force cells like cancer, or ebola, or etc to die off. NOT HUMAN CELLS

  • t m
    t m 3 days ago

    Bacteriophages: *exist *
    Bacterias: I don't feel so good.

  • Jesus Parra
    Jesus Parra 3 days ago

    Germs takes the beating of antibiotics for so long the phage dies out then they attack

  • Mat Broadcast
    Mat Broadcast 3 days ago

    This thing is the inspiration for injectors from Steven universe

  • Kyle The Furry
    Kyle The Furry 3 days ago

    This is so sad
    Alexa play Despacito.

  • Angel Zarate
    Angel Zarate 3 days ago

    Does anybody know what this field of study is called?

  • Joseph Blakemore
    Joseph Blakemore 3 days ago

    5:12 aaaaaaaaaaaaaaaaaaaaaaaaa

  • 닌자검은
    닌자검은 4 days ago +1


  • da bezt goku
    da bezt goku 4 days ago

    I the phages only kill bacterias,than If we put It in our stomach,then we Will start to feel bad?
    Because some bacterias dont harm humans and help to digest food

    • da bezt goku
      da bezt goku 3 days ago

      Pootis Spencer Here thanks

    • Pootis Spencer Here
      Pootis Spencer Here 3 days ago

      That's why you would only use highly specialized phages that only attack the specific bacterias we want to kill.

  • da bezt goku
    da bezt goku 4 days ago

    Thanks,now i wont be able to sleep for days

  • Keven Math
    Keven Math 4 days ago

    what do u get when u combine the 2 most dangerous species on the planet??? a super human immune to all bacteria and all the intelligence in the world...

  • Internet Pest
    Internet Pest 4 days ago

    Superbug: You can't defeat me.
    Antibiotics: I know, but he can.

  • Keiran Tross
    Keiran Tross 4 days ago

    So how are bacteriophages administered to a human being? Could they, like antibiotics, be put in pills, or would it be more practical to inject them directly?

  • Davis
    Davis 4 days ago

    Humans are the most dangerous

  • Melody
    Melody 4 days ago +1

    Looks like Doomagedon virus in Regular Show

  • leuk515
    leuk515 4 days ago

    What if the virus evolves and starts atacking human cells what then? We already infected our self’s they could become even more dangerous!

    • oliossum oliossum
      oliossum oliossum 2 days ago

      leuk515 then who ever is infected die and so do the phages

  • Ten
    Ten 4 days ago

    Is it possible for phages to develop ways to harm our bodies the more we use them?

  • TheShuaibkadri
    TheShuaibkadri 4 days ago

    And thn Phages will evolve to attack human cells... back to square 1.

  • Marcus Gales
    Marcus Gales 4 days ago +2

    Could they evolve to target us as well?

  • ꧁༺Ƹ̵̡Ӝ̵̨̄Ʒ༻꧂

    Damm boyy.. Im sure deadliest spacy in this planet iz hilari libtardis inton.. There is alot of reports which says her fart is veryu veryyy loisionic.. Its ten time worster than that sweet gas which used in aishwidz.. Daymmm... Im sure its becoz he eatted oldfuk jewish fart azz elites motherfukers diks aloott.. I mean alott ! He and his husband mrs billi boll.

  • Luis Miguel Fernandez

    If the phage is so helpful, why is it called the deadliest being in earth?

    • oliossum oliossum
      oliossum oliossum 2 days ago

      Luis Miguel Fernandez did you miss the whole genocide for breakfast thing?

  • The Ghost
    The Ghost 4 days ago

    Battlefied : Virus hardline

  • Mads Vetle Agerup Myhr

    Won't the virus evolve and attack human cells after some time then?

  • Galileo
    Galileo 4 days ago

    that's a weight lifted off my shoulders. One doomsday scenario resolved

  • Josh Griggs
    Josh Griggs 4 days ago

    Where do I sign up

  • Ark Angel WR
    Ark Angel WR 5 days ago

    I really want to be a patreon but I can't because I'm not that rich( I'm poor) so I'm really sorry but I did subscribe.

  • Sidekicks /Lawbringer

    Also sind phages das beste virus...

  • Luca MK
    Luca MK 5 days ago

    Its like phages are Our friends

    POOTIS 5 days ago +2

    It gets in your head, like a virus.
    I have heard this statement so many times from those dumb slenderman ads. My brain is decaying.

  • Nudge
    Nudge 5 days ago

    Alcoholic handjob

  • Anime Universe
    Anime Universe 5 days ago


  • PREDATOR - Gaming & Tech

    The enemy of my enemy is my froed

  • Abbas Haidari
    Abbas Haidari 5 days ago

    Okay this may seem like an unscientific conclusion.. Buy what if the Phages just evolve to use any human cells (say RBCs) instead of bacteria's..then along with the availability of lot of energy they'll evolve even faster and maybe become a threat to humanity??

  • Pajk Imp
    Pajk Imp 5 days ago

    For start I am an atheist and I understand pretty how organisms evolve but how in Darwin's beard these things come to existence? That is serious question, if you tell me aliens I would not be suprised at all.

    • Pajk Imp
      Pajk Imp 3 days ago

      Dee G Thank you, seems likely but I am no biologist.

    • Dee G
      Dee G 3 days ago


  • Jake Boe
    Jake Boe 5 days ago

    Wilhelm scream 5:11

  • LIVE 707
    LIVE 707 5 days ago

    Wow I like this idea

  • Khalid Abdullah
    Khalid Abdullah 5 days ago


  • The Shotties
    The Shotties 5 days ago

    i thought this would be scary but now...i would like to have a phage as a pet :D

  • Tungster24 Scotrp
    Tungster24 Scotrp 5 days ago


  • A gaming show
    A gaming show 6 days ago +3

    Phages are the best

  • Loren Thompson
    Loren Thompson 6 days ago

    What if there is a new bacteria that is immune to antibiotics but has no phage

  • Shawn Lewis
    Shawn Lewis 6 days ago

    I thought this was gonna be another one of those 'Short answer; you'd die' videos but I was very wrong!

  • Trust No1
    Trust No1 6 days ago

    why tf do i want to cry?

  • PotHat
    PotHat 6 days ago

    Viruses.. Brought to you by Bill Gates.

  • greatneil80
    greatneil80 6 days ago +1

    This video needs to go global across the world!

  • Rivera’s Cheese
    Rivera’s Cheese 6 days ago

    How do we even capture/find these phages?

  • KaiKai Kaboom
    KaiKai Kaboom 6 days ago

    They look like those alien robots from Chicken Little

  • Andrew Animation And Gaming

    Antibiotics: Well. were useless now
    Bacteriophage: Omioa mo shinderu

    • Dee G
      Dee G 3 days ago