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 • 21 819

  • Kurzgesagt – In a Nutshell

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

    • secret Phoenix
      secret Phoenix 8 hours ago


    • Luis Lopez
      Luis Lopez 16 hours ago

      I agree but if we do that that means that they the Bacteriophage would maybe attack us by accident and start mutating again and kill us all and every other living thing on earth.

    • Zehao Li
      Zehao Li 21 hour ago

      btw pla make a video on out immune system and what happens when virus attacks

    • sumit SINGH
      sumit SINGH Day ago

      Kurzgesagt - In a Nutshell do one on TWIN PARADOX

  • Oto Gulbani
    Oto Gulbani Hour ago

    great video,keep it up guys!

  • anonymous anyone
    anonymous anyone Hour ago

    Hold on, if we were to introduce phages, like that to every human being, which evolve a million times faster than humans, couldn't it attack our cells over time because there are so many cells and resources for them? I know they are not retrovirus but still, does that matter?

  • inGReEdzZ cHaNNel

    Good now I'm scared

  • Kori Skene
    Kori Skene Hour ago

    This is potentially incredible, I hope it gets more funding.

  • Charles Diable
    Charles Diable Hour ago

    Nice wilhelm scream in there!

  • Ekmek
    Ekmek 2 hours ago

    Nearly every video on your channel makes me feel uncomfortable.

  • sebastian chia
    sebastian chia 3 hours ago

    So Bacteriophages are like anti heroes or some what?

  • Giacomo Rapuzzi
    Giacomo Rapuzzi 3 hours ago

    “Billions are on your eye lids right now”
    Anyone getting that weird feeling?

  • Gaming Cherubims2
    Gaming Cherubims2 3 hours ago

    Kurzgesagt - In a Nutshell
    i would like to know is there to an end of what things are made of? i know it sounds confusing but hear me out for example everything is made of something right? like a wooden table made of planks and stuff like that evrey thing is made of something but is there and end? like atoms what are atoms made of then what is the thing that makes that then makes that and that i wonder please tell me.

  • gate way
    gate way 5 hours ago


  • Darkskeleton
    Darkskeleton 5 hours ago

    Hey seems like a pretty good idea. Hope phages work out as a viable solution.

  • Elian Tonietti
    Elian Tonietti 5 hours ago +1

    i don't know why, but now i feel a special sense of attachement towards phages

  • Kaustubh S.M
    Kaustubh S.M 6 hours ago


  • Santosh Mishra
    Santosh Mishra 7 hours ago

    What's the danger is in it? If bacteria becomes immune to phases, antibiotics can kill it as it's immunity to antibiotics decreases and why is kept experimental till now? By the way excellent animations and explanation and when I stream your videos I do not regret to be a science lover

  • Ashish Yadav
    Ashish Yadav 7 hours ago

    BacterioFAG amirite?

  • Satvik Sharma
    Satvik Sharma 7 hours ago

    Isn't it amazing that in about 500 years, humans have 'evolved' from believing that smells are responsible for diseases to use viruses for killing bacteria.

  • Strangleyourfriend
    Strangleyourfriend 8 hours ago

    TBH the part that bacteria have to give up their resistance to antibiotics to gain immunity to phages and vice versa sounds too good to be true. Like it can't be that sweet deal, can it?

  • Andrey Wie
    Andrey Wie 8 hours ago

    Evolution can do anything. What if bacteria invent a way to resist both? Or phages realise they're being exploited and that they can exploit us in return?

  • Dylan McCormack
    Dylan McCormack 8 hours ago

    Finally a Kurzgesagt that made me all excited instead of giving me an existential crisis. I can dig it.

  • Rohan Arora
    Rohan Arora 9 hours ago

    This video needs to be seen by everyone on earth

  • SDUltraViperSID
    SDUltraViperSID 9 hours ago

    I can see this virus as a new game to safe earth from Bacteria

  • jiale fu
    jiale fu 9 hours ago

    don’t click on read more


  • Haano?
    Haano? 9 hours ago

    This made wash my hands

  • BoNeLeSs pIzZa
    BoNeLeSs pIzZa 9 hours ago

    that's some shit from jimmy neutron

  • warsa jkl 8787
    warsa jkl 8787 9 hours ago

    Question. If phages could kill bacteria that causes us harm, could't they kill the 'good' bacteria, like is our stomach ?

  • Morfe
    Morfe 10 hours ago

    I want to see a game from it

  • Diego Chavez
    Diego Chavez 10 hours ago

    couldn't phages evolve to kill human cells?
    I mean if we inject them very often would'nt they evolve and kill us all?

  • Mickle Fischer
    Mickle Fischer 11 hours ago

    LETS GOOO phages are my homies

  • DeadTroperSociety
    DeadTroperSociety 12 hours ago

    Anyone here also heard the Wilhelm scream?

  • Delfite
    Delfite 12 hours ago

    Wait, if the phages can evolve won't they be able to attack human cell later on?

  • Chalenge time!
    Chalenge time! 13 hours ago

    That all sounds great but what if bacterias find that perfect middle in protection between antibiotics and phages?

  • Trimis Adventures
    Trimis Adventures 13 hours ago +1

    I gained confidence

  • quqeyodle doo Heck
    quqeyodle doo Heck 13 hours ago

    keep it up

  • Ongoing Coyote
    Ongoing Coyote 14 hours ago

    What if the phages evolve to kill people cells

    • Golden Power
      Golden Power 3 hours ago

      Ongoing Coyote Human cells are way too different for them to attack, so it's unlikely

  • Johnny Favorite
    Johnny Favorite 14 hours ago

    Homicidal Phageiacs?

  • Dha Cookie Monster
    Dha Cookie Monster 14 hours ago

    That looks like that thing in the kindergarten in Steven universe, ya know the one that digs into the earth... yes no okie bie

  • Lucas Rangel
    Lucas Rangel 15 hours ago

    The only big problem is that isn't a general spectre phage, we still need to find out witch bacteria to atack to administrate the right phage.

  • dat boy
    dat boy 15 hours ago

    But what if phages evolve to the point that are able to take down the good bacteria and even human cells, then what do we do?

  • Tartaman Tarta
    Tartaman Tarta 15 hours ago

    Plotwist:what if the phages evolve to destroy humans???? Hmmmmmmm???

  • Holy
    Holy 15 hours ago

    Wouldn’t we get immune to some bacteria tho

  • foreverkurome
    foreverkurome 16 hours ago

    good worms references :)

  • Vincent Alley
    Vincent Alley 16 hours ago +1

    The enemy of the enemy is my friend.

  • Arigilos DeathGaze
    Arigilos DeathGaze 16 hours ago

    This was a cool video. I've never heard of a bacteriophage before.

  • Bowen Liu
    Bowen Liu 16 hours ago +1


  • Don'tHurtYourSelf Sucka

    They weren't there hero's we wanted, but the hero's we need.

  • •.South Things.•
    •.South Things.• 16 hours ago

    Bacteria: who TF pushed me-
    Phage: *digs inside bacteria*
    Phage: that's right don't touch the humans u lil thot

  • King of kings
    King of kings 16 hours ago +1

    It's just a PHAGE bro.

  • natsuki the cutie
    natsuki the cutie 16 hours ago

    They dont seem so bad when u think about it
    They're saving lives so they're actually on our side
    Yay we're not gonna die!

  • Elias Reyes
    Elias Reyes 17 hours ago

    I’m not a scientists or anything like that but... what if the phages evolve as a result of overuse on humans and start targeting human cells? Is that even posible? Or we shouldn’t worry about it?
    Btw. I love this channel. I think is Among the best of TVclip. Keep up the good work!!!

    • Golden Power
      Golden Power 3 hours ago

      Elias Reyes it's unlikely, human cells are way too different for the phages to attack them

  • G0D3N YT
    G0D3N YT 17 hours ago

    Hitler: Makes Holocaust that lasts for 4 years and barely kills half of european jews
    Phages: Commit Genocide for Breakfast

  • souper awsome
    souper awsome 17 hours ago

    *robs labs and overdoses phages*

  • Who am I?
    Who am I? 18 hours ago

    I want a Phage as a friend and they sound like awesome things

  • HubbaBubba701
    HubbaBubba701 18 hours ago

    Natural cure for everything

  • Brick By Brick
    Brick By Brick 18 hours ago

    Great this gives me hope that I won’t die from a cut or scrape in the future

  • C H I C K E N S T R I P Z

    Your animation is outstanding and your topics are so thought provoking. Well done this channel is great!

  • Grim spy
    Grim spy 19 hours ago

    Phages are just bacteria MLGs

  • -[Pathologist]-The Accusator

    Its just a virus

  • Magda Sulek
    Magda Sulek 19 hours ago

    This is awesome!! But there might be people like anti-vaccine but for phages. I hope that the use of phages will be popular soon!

  • bathish k
    bathish k 19 hours ago

    Hey, there is this deadly virus called as nipah started to spread in Kerala, India. If you could make a video on it then please

  • Conner Japikse
    Conner Japikse 20 hours ago

    You guys have put the Wilhelm scream in the past few videos aah

  • Mehdi Talebi
    Mehdi Talebi 21 hour ago +2

    I guess......

    We are still the most destructive though......

    You still scrolling?

    Bad luck

    Still scrolling?

    You giving up?


    I'm close to finishing...


    Almost there

    You got to be a good scroller!

    -------- World Record For Most Scrolled In 30 Seconds



    Nice day isn't it?

    Almost there!

    Yeah baby!

    Yes!!! You did it! Good work!

    P.S. Have a good day and enjoy the week!

    You'll probably be seeing other comments like this in other videos....

    So watch out!


  • Espen Sales
    Espen Sales 21 hour ago

    I don't wanna hate but, I've heard a couple of times now people who pronounce "drawing" as "drawr-ing" and I don't understand what that's all about.

  • Dr.Sonny
    Dr.Sonny 21 hour ago +1

    Its an Evolutionary Race between us and the viruses and bacteria.
    Also imagine if we one day could program the Bacteriophages to target Humans.. That would be interesting.. We could Tackle the Overpopulation problem.. But ofc that's just my imagination ..not gonna do it in real life 😅😅
    Great Video tho.

  • Sanjay Ajayan
    Sanjay Ajayan 21 hour ago

    Didn't know something so abundant existed .. until now

  • Faisal Alhoti
    Faisal Alhoti 22 hours ago

    phages rule earth!!!!!!

  • Horacious
    Horacious 22 hours ago

    Yes, but what if the phages will kill all the bacteria in our body, then it won’t have what to attack and how to reproduce, so probably it will have a mutation that will let it attack the human cells

  • Ryan Hickman
    Ryan Hickman 22 hours ago

    Haters beware the phases are coming for you!!!!!!! (Literally)

  • Ryan Hickman
    Ryan Hickman 22 hours ago

    Hello kurzgesact! I have a suggestion! Can you show us what quarks are made of! Also show us what cancer does to the body? Also can you show us what radiation does to our body? Can you show us the other dwarf The Brown dwarf 😄:) thanks Sincerly Ryan Hickman

  • BoomBoom LOLZIP
    BoomBoom LOLZIP 23 hours ago

    Pages are awesome even though I hate needles

  • Barry Steakfry
    Barry Steakfry 23 hours ago


  • Oscar - Blob
    Oscar - Blob Day ago

    If these keep evolving... in 100 years we May be able to see them... small monsters having wars on our skin and inside of us. 😱

  • Ian song
    Ian song Day ago +1

    Umm... what if phages evolve to kill humans?

  • Ray B
    Ray B Day ago

    Im curious, I heard that the USSR worked on virus treatment to kill bacteria? Since the "West" held on to the antibiotic technology?

  • trackz
    trackz Day ago +1

    In ww2, Adolf Hitler and Joseph Stalin joined forces together.
    Today, humans and bacteriophages are teaming up.
    _i guess you could say that history is repeating itself._

  • Rocketxu Google
    Rocketxu Google Day ago

    What if the phage's prey is all dead while they are still in our body. Will they evolve to eat us?

  • Nameless YouTuber UnderTale Naruto1973

    This might get me made but the phage is basically the n@zits if they attacked just to survive...

  • Kage
    Kage Day ago

    Ich wusste garnicht das du Österreicher bist.

  • Razabaza Azabazar

    Get em off me

  • sumit SINGH
    sumit SINGH Day ago

    Do one on TWIN PARADOX

  • Federico Jimbo Smithson

    this is like good vs evil epic battle

  • Rapto YT
    Rapto YT Day ago

    when a dangerous thing can save your life


  • Wilhelm den Braver
    Wilhelm den Braver Day ago +1

    I love this channel so much!!

  • LIST
    LIST Day ago

    So basically, playing worms is the solution

  • shungunner 1968
    shungunner 1968 Day ago

    we just learned that today in school

  • sugandha jadhav
    sugandha jadhav Day ago

    Amazing animations . Can you make a video on water

  • Higgs Bonbon
    Higgs Bonbon Day ago



    Did u know that I almost pooped my pants when i watch the first few seconds of the video

  • killerDZ TrissDZ

    hey can you please make a theory about vape since you have watched those awesome vape tricks )if you have watched them actually)

  • barunedpat
    barunedpat Day ago

    Phage the untouchable?

  • Javier Perez
    Javier Perez Day ago

    I understand that phages are selective in their process of identifying and destroying a bacteria. Now I ask, is there any way that these phages could be engineered to recognize and attack human cells? For example, the HIV virus (wich is a retrovirus but essentially works in a very similar way) has T CD4+ Lymphocites as their target, and the final result is what we know as AIDS. My question is as fallows. Is there any way that these bacteriophages could be used to target specific human cells? This implies that ir could be used also as a Cancer therapy or as a biological weapon. Thanks for the great videos and excellent content

  • RainbowLianne GT

    They look like a robot

  • Ng Ken Chew
    Ng Ken Chew Day ago

    Soo... This means that phages are god's gift to humans.... Yay

  • 趙昱凱
    趙昱凱 Day ago

    NICE video:))

  • AllChemystery
    AllChemystery Day ago

    Hmmm. Bill Gates, Ever the eugenicist does seem to have this idea that a so called superbug will wipe out much of humanity. seems to know the future. it is no surprise he would sponsor a video with such a message embedded in it.

  • Memez Lordz
    Memez Lordz Day ago

    What if the phages evolved to harm us?

  • twenty-øne titans

    Hey @kurzgesagt please make a book, I love your videos but they are just too short

  • max young
    max young Day ago

    Dude idk why but i cracked up at the sight of little dudes with geometric shapes for heads but having fucking weapons was just really funny

  • julsune
    julsune Day ago


  • ChristerOx YT
    ChristerOx YT Day ago

    This reminds me of regular show