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 • 33 008

  • Kurzgesagt – In a Nutshell
    Kurzgesagt – In a Nutshell  7 months ago +1447

    There's brand new stuff in the Kurzgesagt Merch Shop. Check it out here:

    • Kiyou Estrada
      Kiyou Estrada 2 days ago

      Were are the sources

    • ParaEwie
      ParaEwie 7 days ago

      I just massacred Bacteria by washing my hands and at the same time caused a Bacteriophage Holodomore

    • E Dab
      E Dab Month ago

      Make a video about Rabies

  • Matt Altakis
    Matt Altakis 46 minutes ago

    Seriously. This is not true

  • kirra s
    kirra s 4 hours ago

    Fuck it, bacteriophage time

  • Alan Martinez
    Alan Martinez 6 hours ago

    Serious question- is there a field in science looking at developing a virus that could specifically target cancer cells? Is that even possible? Or are cancer cells too different (Like how human cells are immune to these)

  • keith laham
    keith laham 9 hours ago +2

    The phage is the perfect example of sacred geometry.

  • keith laham
    keith laham 9 hours ago

    Jesus get a facecloth will ya. You got Phage all over ya face kidddddddddddd

  • Tim YT
    Tim YT 11 hours ago

    *Phage has joined the chat*

  • Tim YT
    Tim YT 11 hours ago

    Bacteria: We are the superior beings

    Phage: *Im about to end this mans whole career*

  • Bacteriophage
    Bacteriophage 14 hours ago

    *_All bacteria should be expired_*

  • Enzo Delobelle
    Enzo Delobelle 15 hours ago

    Ses nous l être le plus dangereux

  • Dee Cee
    Dee Cee 17 hours ago

    So, anyone else thinking about modifying these phages for cancer?

  • Lifesceptile123
    Lifesceptile123 18 hours ago

    I just love your videos

  • just chilling
    just chilling Day ago


  • Miro
    Miro Day ago +2

    Awww man, they look like creepers!

  • Foozle 1-Up
    Foozle 1-Up Day ago

    But phages target specific bacteria...but for that we need to be exactly sure what disease your carrying..a simple fever might be cause by a simple war between bacteria and WBC but a simple fever can also be cause by something else...another underlining disease...for phages to work we need to be sure what's going will be like have a blood test for headache and fever bcz it can be a cold...a flu.. throat infection...or something more deadly

  • Uber Cena
    Uber Cena Day ago

    Bacteria: *runs from phage to infect body*
    Humans: *Injects body with phages*

    Bacteria: _Wait that's illegal_

  • Uber Cena
    Uber Cena Day ago

    Superbugs: Once I invade the body, I'll--

    Phages: _I'm gonna stop you right there_

  • Mathieu Demers
    Mathieu Demers Day ago

    Like Gems into the Steven Universe are born

  • Just a random guy
    Just a random guy Day ago +1

    Ive watched this video atleast 50 times, and I just noticed the Worms Battleground joke at 4:41. Nice Kurzgesagt.

  • ManiakNoot
    ManiakNoot Day ago

    "Phages are the deadliest beings on earth"
    *Protects humans from superbugs*
    Phages: you are bad guy, but this does not mean you are bad guy.

  • Wuble
    Wuble Day ago +1

    Wilhelm scream at 5:12
    A surprise to be sure, but a welcome one.

  • Roland xB
    Roland xB Day ago

    That scary "superbug" number of 23.000 deaths a year in the U.S. is very misleading. It lists all deaths where the multi-resistant bacteria was detected. But just because you have this bacteria in your body doesn't mean that it killed you. All these people in hospitals have other illnesses that actually got them in there. Resistant bacteria are usually harmless to healthy people. Most of the times, it is the underlying cause that kills the person, not the resistant bacteria.

  • Antraeon Rintokken

    So what happens if a phage that kills GOOD bacteria comes along? What happens to our microbiomes, and by extension, us, in that case?

    • Lünkel
      Lünkel Day ago

      Then we won't use it on people as a way of treating diseases?

  • Dark Fox
    Dark Fox Day ago

    Sounds like something that could've been useful to a family friend recently. Wait, why is big pharma afraid to invest in this when they make it back in like a couple days?

  • Octordoctor
    Octordoctor Day ago +2

    but if they evolve too cant they evolve to attack human cells?

  • Kokayn Eu
    Kokayn Eu Day ago

    so phages basicly rape the bacteria to death ? seems like something straight out of a hentai

  • Marqan
    Marqan 2 days ago

    My name is Phage... Bacteriophage!

  • Iqrah The Animator
    Iqrah The Animator 2 days ago

    Bacteria: I’m the deadliest organism on the planet!
    Bacteriophage: hold my genetic information

  • Egg
    Egg 2 days ago

    Holy shit. Bacteriaphages are awesome

  • Kian_derman YT streamer BTW

    We are deadly too let’s team up with the 1st deadly so then we don’t ignore each other anymore because we are friends :D

  • ExoticGaming 810
    ExoticGaming 810 2 days ago

    But cant phage be used to get rid of bacteria. If it were so deadly why would we inject it into us sometimes?

  • Danish Meman
    Danish Meman 2 days ago

    well that was a waste of 2 hours. poor Stephen Fry sitting there wondering "why the hell aren't we talking about political correctness?!?!"

  • [Caníbal] Ykaryuz
    [Caníbal] Ykaryuz 2 days ago

    Awesome greetings from Mexico 😀

  • sum dood
    sum dood 3 days ago

    So what if phages advance enough to start to become another super disease??

  • Alex Fox
    Alex Fox 3 days ago

    it is a welder!

  • Digital Game Land
    Digital Game Land 3 days ago +1

    What happens when they kill all the bacteria on a person? Do they start to kill the person or themselves?

    • Candy and Darkside
      Candy and Darkside 3 days ago

      Since there are a LOT of bacteria in a person, I doubt that'll happen, tho they'll probably just die out since they need and attack that specific bacteria and its close relatives to reproduce

  • zPrecisionnn
    zPrecisionnn 3 days ago +3

    This is like a pe teacher joining a team

  • Fyn Pedersen
    Fyn Pedersen 3 days ago

    i see this as a absolute win


    Steven universe

  • Dreadn0ught
    Dreadn0ught 3 days ago

    The Worms game reference made me feel warm

  • BlackParade
    BlackParade 3 days ago

    I remembered this from one of the Jimmy neutrons episodes

  • Crab
    Crab 3 days ago +1

    Phage: prepare for trouble
    Humans: and make it double

  • MultiYuniversal
    MultiYuniversal 3 days ago +1

    so the phages are just mini thanoses (thani???)

  • Happy Potato
    Happy Potato 3 days ago +1

    This is by far my favourite video on Kurzgesagt.

  • MegalodoN
    MegalodoN 4 days ago

    When I get a serious disease I will lie in the bed and yell “fuck it, gimme dem phages”

  • Emerald John Falame
    Emerald John Falame 4 days ago

    Superbugs: YES! We made it to the last level this will be easy since we have the immune to antibiotic perk
    also superbugs:goes in
    phage: HeLLo!
    superbugs has quit the game

  • Emerald John Falame
    Emerald John Falame 4 days ago

    A Phage is like a sniper your scared of being killed by them but then you can also hire them to kill other enemies

  • metlha tshanana
    metlha tshanana 4 days ago

    Can't phages evolve to killing human cells when there are no bacteria or another cell to fight against?

  • Cookie Queen
    Cookie Queen 4 days ago +1

    I wish all the phages could be put into pills..........

    -Anti-Vaccine moms named Karen

  • Pa'rth Kshkz
    Pa'rth Kshkz 4 days ago

    This is future ... This need of hour ...

  • Luka Rochikashvili
    Luka Rochikashvili 5 days ago

    once i had an ingrown toenail and it was so bad, it had to be removed by surgeons. after the surgery they told me to buy this anti bacterial stuff called "PYOphage" or "PYO Bacteriophagum", it was really cheap and we asked them if it was an antibiotic but they said it wasnt. after some time i saw this vid and decided to watch, then i remembered the medicine, looked into it more and turns out that it IS the phage! they are selling it in regular pharmacies in small vials containing 10 million phages and i gotta tell you, that stuff really works

    PRO GAMER 5 days ago

    Yürü be assanımm

  • Neket
    Neket 5 days ago

    Hallo, I like your channel but if you can, please translate video on Russia. 😊

  • [GD] PatrickTheMayonaise01

    Bacteria: you will never win

    Antibiotic: I know but he can
    *Bactiophage jumps into fight*

  • TovenOvideoRPC
    TovenOvideoRPC 5 days ago

    2050: Phages get tired of being slave soldiers and turn on us

  • Cardboard Sliver
    Cardboard Sliver 5 days ago

    You thought I was just a virus.
    But it was really me, Phage.

  • dan 17000
    dan 17000 5 days ago

    wait... wow! cool, very impressive but actually just making MORE humans live is not what we should be looking for. we should be looking for a place to live if we will ran out of it. which leaded me to think that these scientists learen biochem before thinking of doing these expirements and didnt wanted from the first place to be the scientists who are taking care of mammles, fish, birds and bugs. nvm why did you read this(why did i wrote this????)?

  • Purpledudeanimates Animations

    4:34 is when ur saying ur going to beat up big kid then you meet him.

  • Purpledudeanimates Animations

    My frenemy?

  • Papaya Tasty
    Papaya Tasty 5 days ago

    Doesn't immune system target Phages?