4 Parasites Too Creepy to Exist

  • Published: 12 August 2019
  • Go to Brilliant.org/SciShow to try their Beautiful Geometry course. The first 200 subscribers get 20% off an annual Premium subscription.

    Warning! This episode is a little gross… Between 1/3 and 1/2 of all life on earth is parasitic - and here are 4 of the creepiest parasites we know about.

    Hosted by: Hank Green

    SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at scishowtangents.org
    Support SciShow by becoming a patron on Patreon: patreon.com/scishow
    Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:

    Adam Brainard, Greg, Alex Hackman, Sam Lutfi, D.A. Noe, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters
    Looking for SciShow elsewhere on the internet?
    Facebook: facebook.com/scishow
    Twitter: twitter.com/scishow
    Tumblr: scishow.tumblr.com
    Instagram: instagram.com/thescishow

    Image Sources:




Comments • 1 373

  • SciShow
    SciShow   2 weeks back

    Go to http://Brilliant.org/SciShow to try their Beautiful Geometry course. The first 200 subscribers get 20% off an annual Premium subscription.

    • Desus Vult
      Desus Vult  6 days back

      Nice stock photo of a walleye at 1:54 (Maybe European Zander).

    • Humanity is a lost cause Self centered lunatics
      Humanity is a lost cause Self centered lunatics  1 weeks back

      Finally got around to covering parasites. Damn, you're slow. Just from the first parasite you listed, I'm already confident I've heard of every one on the list.

      I'm hardcore on science.

      Meanwhile, I'm also sure you left off the worst. Humanity.

    • Gaurav Nema
      Gaurav Nema  1 weeks back

      @Władca Wymiaru

      A disease in which abnormal cells divide uncontrollably and destroy body tissue.
      Learn more at https://g.co/kgs/Z2Uqwx

    • Władca Wymiaru
      Władca Wymiaru  1 weeks back

      @Gaurav Nema
      So WHAT it is?

    • Gaurav Nema
      Gaurav Nema  2 weeks back

      @Władca Wymiaru You must be new here. Cancer isn't a parasite.

  • skippy weeko
    skippy weeko  16 minutes back

    I expected the number 1 entry to be my ex wife

    • The Void Alchemist
      The Void Alchemist  2 hours back

      No word about dracunculiasis? Those f-ers haunt my dreams!

      • The Void Alchemist
        The Void Alchemist  2 hours back

        I guess corticeps is old news at this point

        • Nein Nicht
          Nein Nicht  3 hours back

          Its isopod hours

          • Cristina Arguedas
            Cristina Arguedas  6 hours back

            You for got the groupist workay who will land themselves into an unexpecting group of students and will gain all their grade recources, do nothing, and then leave once they have done

            • Arturo Adam
              Arturo Adam  6 hours back

              a parasite that is a master manipulator, oh you mean my exgirlfriend?

              • T λ C O. phox
                T λ C O. phox  15 hours back

                I hate everything about this. But equally intrigued too

                • Death Omen
                  Death Omen  19 hours back

                  The fish tongue isopod parasite inspired a movie. It's called The Bay. As if it's very existence did not justify being nightmare fuel already...

                  Edit: Oh my god I feel so bad for the infected crabs 😭 poor crabs

                  • Lemon
                    Lemon  21 hours back

                    IS it just me or those this guy sounds like lester from GTA V?

                    • Delta Lima Bravo
                      Delta Lima Bravo  1 days back

                      “4 parasites too creepy to exist”?????
                      The title is a little silly considering they DO exist. Right?

                      • Korrie Rose
                        Korrie Rose  1 days back

                        Augh I cannot stand the tongue biting one

                        • Captain Srovy
                          Captain Srovy  1 days back

                          Ads are also parasites!

                          • Night Dreams
                            Night Dreams  1 days back

                            Was the flowers made and thought it should be the demo goth on from stranger things

                            • Night Dreams
                              Night Dreams  1 days back

                              What if the isopod dies inside from the fish?

                              • Austin Hall
                                Austin Hall  1 days back

                                Is anyone else itchy? Im itchy

                                • John Red
                                  John Red  2 days back

                                  I have one of this tongue bitting isopods preserved.

                                  • White Blogger Black Specs

                                    Poor Mr. Krabs 🦀

                                    • Emma 669
                                      Emma 669  2 days back

                                      Why isn't my uncle on this list?

                                      • White Blogger Black Specs

                                        Humans are the worst parasite...

                                        • Fluid Mosaic
                                          Fluid Mosaic  2 days back

                                          Well that’s killed my libido

                                          • Mad Rob
                                            Mad Rob  2 days back

                                            How about Necromorphs

                                            • K Fox
                                              K Fox  2 days back

                                              What if WE’RE PARASITES?

                                              • Sj W
                                                Sj W  2 days back

                                                trump = parasite

                                                • SquidBoi ·
                                                  SquidBoi ·  2 days back

                                                  *Skullgirls would like to know your location*

                                                  • Aquilis Blasco
                                                    Aquilis Blasco  2 days back

                                                    How did you guys forget to mention cordyceps?

                                                    • DarkDove_
                                                      DarkDove_  3 days back

                                                      my flatmate is a parasite

                                                      • Walt Edwards
                                                        Walt Edwards  3 days back


                                                        • Haze87x
                                                          Haze87x  4 days back

                                                          #1 is disgusting

                                                          • TheWisestDwarf99
                                                            TheWisestDwarf99  4 days back

                                                            The worst parasite?

                                                            My gf

                                                            Nah jk I don't have a girlfriend

                                                            • Peterson A
                                                              Peterson A  4 days back

                                                              Step 1. Go to Google
                                                              Step 2. Search this keyword: 123moviesdaily
                                                              Step 3. Enjoy!
                                                              4 Parasites Too Creepy to Exist
                                                              It is a curious thing, the death of a loved one. We all know that our time in this world is limited, and that eventually all of us will end up underneath some sheet, never to wake up. And yet it is always a surprise when it happens to someone we know. It is like walking up the stairs to your bedroom in the dark, and thinking there is one more stair than there is. Your foot falls down, through the air, and there is a sickly moment of dark surprise as you try and readjust the way you thought of things.

                                                              • Stephen Benner
                                                                Stephen Benner  5 days back

                                                                For some reason this video made me think of Harold Skimpole.

                                                                • Tammy Rossitto
                                                                  Tammy Rossitto  5 days back

                                                                  Y'all forgot about toxoplasmosis! The parasite you get from cat feces and can turn ears and nice into zombies!

                                                                  • Nor Adrenalin
                                                                    Nor Adrenalin  5 days back

                                                                    Gene Stealers?!? Someone get the Ordo Xenos!

                                                                    • Björn Caldersparr
                                                                      Björn Caldersparr  5 days back

                                                                      "Just one more video before sleep"
                                                                      Oh damn, that will be food for nightmares tonight...

                                                                      • dieubermensch
                                                                        dieubermensch  5 days back

                                                                        1/3 or 1/2 of life is parasitic? now i know why my ex was like that.

                                                                        • Shataki
                                                                          Shataki  5 days back

                                                                          My stomach doesn't feel good now...

                                                                          • Kouta Takanashi
                                                                            Kouta Takanashi  5 days back

                                                                            I sure love watching scientific videos while cooking and eating

                                                                            • Rigging Doctor
                                                                              Rigging Doctor  6 days back

                                                                              Does the government count as a parasite on the populous as the host?

                                                                              • Kingdom Farts
                                                                                Kingdom Farts  6 days back

                                                                                Corpse flowers are fugly tho...

                                                                                • ToMiCo 91
                                                                                  ToMiCo 91  6 days back

                                                                                  Humans are a parasite of Earth.

                                                                                  • Anthony Green
                                                                                    Anthony Green  7 days back

                                                                                    2019... even the crabs got crabs...

                                                                                    • Nill Gddy
                                                                                      Nill Gddy  7 days back

                                                                                      you forgot about illegal immigrants from mexico.

                                                                                      • Bethanie Petitpas
                                                                                        Bethanie Petitpas  7 days back

                                                                                        "But wait -it gets worse!"

                                                                                        • Itwilsonboiii
                                                                                          Itwilsonboiii  1 weeks back

                                                                                          You forget mushrooms on ant

                                                                                          • Dan Jumash
                                                                                            Dan Jumash  1 weeks back

                                                                                            Hmm wtf 101?

                                                                                            • Imran Shishir
                                                                                              Imran Shishir  1 weeks back

                                                                                              Holy hell!

                                                                                              • Ray Chang
                                                                                                Ray Chang  1 weeks back

                                                                                                I think "human bot fly" should be here. Great list!