4 Parasites Too Creepy to Exist

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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
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Published on


Aug 11, 2019




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Comments 1 315
SciShow 5 days ago
Go to Brilliant.org/SciShow to try their Beautiful Geometry course. The first 200 subscribers get 20% off an annual Premium subscription.
Humanity is a lost cause Self centered lunatics
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 2 days ago
@Władca Wymiaru A disease in which abnormal cells divide uncontrollably and destroy body tissue. Learn more at g.co/kgs/Z2Uqwx
Władca Wymiaru
Władca Wymiaru 3 days ago
@Gaurav Nema So WHAT it is?
Gaurav Nema
Gaurav Nema 3 days ago
@Władca Wymiaru You must be new here. Cancer isn't a parasite.
Władca Wymiaru
Władca Wymiaru 3 days ago
*HEY!* The SCARIEST parasite even wasn't on the LIST!!! *IT IS CANCER* !!!
Dan Jumash
Dan Jumash 5 hours ago
Hmm wtf 101?
Imran Shishir
Imran Shishir 6 hours ago
Holy hell!
Ray Chang
Ray Chang 16 hours ago
I think "human bot fly" should be here. Great list!
Rebeça Sabourin
Rebeça Sabourin 18 hours ago
This didn't gross me out, it just made me really sad for the animals that are infected .
Myk3sr vLogz
Myk3sr vLogz Day ago
But wait... There's more!!!!
Emily Turner
Emily Turner Day ago
Aren't foetuses basically parasites?
Moriano Mordekhai
I'm disgusted, but also, want a part two of this.
LeatherNeck 1833
I had a blood thirsty, life sucking, manipulative, pain in the @ss parasite once. I finally got a court appointment to remove it.
Fist O' Pain
Fist O' Pain Day ago
No. 1: My kid
Leah Rose
Leah Rose Day ago
To my surprise, landlords are not on this list
Kep Spark
Kep Spark Day ago
Talking about weird!😂😂 Maybe that's how evolution works. In millions of years, they might become part of the base creature & the new hybrid creature will be everywhere & called as complex creature. Like us!😶
akakaki Day ago
More parasites, please! :D
its just luke Revive
Those poor unfortunate souls! 🐙
Gajanan Nigade
Gajanan Nigade 2 days ago
Why am I watching this while having my dinner???!!!
Gajanan Nigade
Gajanan Nigade 2 days ago
Why am I watching this while having my dinner???!!!
Philippecr 2 days ago
I'm a lil bit surprised that Cordyceps are not included. 🤔
Dave Blane
Dave Blane 2 days ago
why all the arm-waving???
Ron B
Ron B 2 days ago
I suddenly remember those parasites in society. They aren't beautiful unfortunately.
Homer's Iliad
Homer's Iliad 2 days ago
Be honest hank, do you watch College Humor?
Matthew Califana
Matthew Califana 2 days ago
I heared it thru the grape vine .
Mark Ash
Mark Ash 2 days ago
You forgot my sister-in-law's son! Thanks for the great videos. 😁
Matthew Califana
Matthew Califana 2 days ago
I AM YOUR HOST ! Parasites there,s a big FAT one in the white house !
Drakilicious 2 days ago
"They mate in the fishes mouth." lol as if it couldnt get any worse.
El Fin
El Fin 2 days ago
Are we sure the corpse flower gene swapping isn't another tardigrade like mistake.
Sylvain Piche
Sylvain Piche 2 days ago
of course... since we are ourself parasites of earth... we take everything and we only hurt it back... something to think about...yes?
Lewis Johnson
Lewis Johnson 2 days ago
DNA swiped from the grapevine... or evolved from the grapevine?
Drevas777 2 days ago
Ask to seduce Miss
Let see, psychopath and narcissist.
sonny lee
sonny lee 3 days ago
There's something living in my rectum, something really little and it's scraping against my rectal walls
James Carmody
James Carmody 3 days ago
Disliked for the misleading title; loved the video otherwise!
Ask to seduce Miss
I heard this through the Grapevine
Robeela Khan
Robeela Khan 3 days ago
*"Habit of going for the mouth"* I see what you did there, Hank!
Alex Mercer
Alex Mercer 3 days ago
This is incredibly cool! I.E. If you don't view it as a nightmare, but as superpowers. These parasites seem to have superpowers! How cool! Not nightmarish at all! At all!
firecat6666 3 days ago
Fun fact: barnacles are crustraceans, just like crabs
James Matskogv
James Matskogv 3 days ago
Couldn't male genitalia be classified as parasitic? I mean think about it 1: They demand a constant supply of nutrients 2: They take over your brain and make you do things 3: They tend to make it very easy to "take care" of them
Tony Ortega
Tony Ortega 3 days ago
Open your mouth and say Ahh~ And you too, go Ahh~
Sarah Morton
Sarah Morton 3 days ago
I volunteer to go to mars
Fineapple Qveen
Fineapple Qveen 3 days ago
You forgot to mention my ex...
Finn Beruldsen
Finn Beruldsen 3 days ago
I'm not a botanist but i think that corpse flower and corpse lily might be confused in your video.
Ice Karma
Ice Karma 3 days ago
I find it fascinating how, in... recent-ish times, we've gone from thinking that horizontal gene transfer only happened in archaea and bacteria, to discovering plants and even some animals that do it or have done it, too!
Esoteric Emissary
Do the barnacles work on Crab People.... Crab people.... Crab people.... Crab People...
Cameron Strommen
Cameron Strommen 3 days ago
Parasitic barnacles? is the next last of us game set in the sea? It could be
Cameron Strommen
Cameron Strommen 3 days ago
Heard about all of these on your podcast: Scishow Tangents ☺
Iago Silva
Iago Silva 3 days ago
2:31 Not to mention Boffins, Bagginses and Bracegirdles
Jari Fuller
Jari Fuller 3 days ago
Sudstah Gaming
Sudstah Gaming 3 days ago
Puppet barnacle
CheckDozeCorners 3 days ago
I heard this through the Grapevine
La haba
La haba 3 days ago
Let see, psychopath and narcissist.
Puppet lover
Puppet lover 3 days ago
I love Vileplume!!
Cassie 3 days ago
happy. We all deserve to be blissful on our very own terms.
Jeremy Morris
Jeremy Morris 3 days ago
Professor foxtrot beat you to it.
Puppet lover
Puppet lover 3 days ago
increased risk taking.
Władca Wymiaru
Władca Wymiaru 3 days ago
Thanos should snap those parasites!
Cassie 3 days ago
NO UPFRONT PAYMENT Stark Brian12012011042 is truely the best. Just bought 45,000 Secure Funds Transfer to my Chase account and savings card. He paid off all my pu
merwindor 3 days ago
Are humans parasites?
Lachlan Hamilton
Lachlan Hamilton 3 days ago
"Parasitic Overlords"...... so... a bit like the Tory party...?
Emily An
Emily An 3 days ago
Your mom ...
Taps fan
Taps fan 3 days ago
Oh my God, those parasites turn those poor crabs into soyboys...or to be more precise, soycrabs 😂😂!! 💜💀💙
Emily An
Emily An 3 days ago
ingesting the substance of the host inflicting a physiological transformation. two The parasitic demon can no longer be separated from the host.
No toxoplasma gondii? Disappointing.
Amy Leigh
Amy Leigh 4 days ago
OMG! Hank Green! I had no idea he had a show other than Crash Course! ..I clearly don’t get out much. .. Dear Hank Green - thank you for all you’ve contributed to my education. You’re such a talented educator and I’m so happy to see you’re still teaching and advocating for access to education.
Lamia'sFaust 4 days ago
Im a lil bummed about this video, the crab thing was super cool, and i didnt know corpse flowers were grapevine parasites, but everything else talked about felt kinda old hat? Like im in my mid 20’s so maybe im less the target audience but I always feel bummed leaving a scishow vid feeling like i havent actually learned anything new
singerliljermz 4 days ago
These parasites are aliens especially that flower nearing the end of the video.
Edgar Wen
Edgar Wen 4 days ago
this is probably one of the worst ways to find out about a crab's "brooding chamber"
sinephase 4 days ago
and now we need an entire episode about cordyceps (if you don't have on already :P)
Tramaine Terrance
Hello, Humans. Mysterio: People need to believe and nowadays they will believe anything. (Spider-Man Far From Home) TERRANCE OUT
Meowi The Kittycorn
before watching this: ppl: parasites are gross me: meh idc bout them much after watching this: ppl: eww!!i gotta be more cautious me:-sees a parasite on a crab- O MY GOODNESS -burns the infected crab-
TheNameIsBrayden X
What about the Emerald Cockroach Wasp aka the Zombie Wasp? It’s a wasp parasite species that find cockroaches, stings it to paralyze, and manipulates it’s mind to letting the wasp lay it’s larvae inside the cockroaches stomach. Over time, the larvae feed on the cockroaches nutrition and eat everything till their all grown up. I don’t know what the male does, but the female does all of this and continues to do so.
* SIMON Says
* SIMON Says 4 days ago
Democrats are parasites
Deep hug
Deep hug 4 days ago
increased risk taking.
Pisces Guy JF
Pisces Guy JF 4 days ago
I love Vileplume!!
Willy Wacker
Willy Wacker 4 days ago
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Deep hug
Deep hug 4 days ago
Toxoplasmosis - infects cats, rats...and humans. Causes behavioral changes in rats (that make them more likely to be eaten by cats)......and humans too, which causes
Tracy Green
Tracy Green 4 days ago
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Bloom Potato
Bloom Potato 4 days ago
Try parasitic wasps. Especially tarantula hawks. Gruesome my dude
angel olivares
angel olivares 4 days ago
So basically we’re parasites
Amber Harrelson
Amber Harrelson 4 days ago
house aliens demons.the extraterrestrial invasion is very real. two It is a bodily invasion they take over the whole human being, the host. They are precisely parasitic, surely ingesting the substance of the host inflicting a physiological transformation. two The parasitic demon can no longer be separated from the host.
Big Tone
Big Tone 4 days ago
Your mom ...
Victoria 666
Victoria 666 4 days ago
Wow these creatures are just like my ex-best friend
wrath of the lamb
*space aliens (demons).* *the extraterrestrial invasion is very real. It is a bodily invasion (they take over the entire human being, the host). They are exactly parasitic, essentially consuming the substance of the host causing a physiological transformation. The parasitic demon can not be separated from the host.*
Rebekah 4 days ago
Pregnancy is a parasitical relationship.
Jame Andy
Jame Andy 4 days ago
I can relate to the crab. One time a parasite transformed my testicles into ovaries to make me greater maternal.
XynanXDB 4 days ago
The gruesome parasites are Cordyceps
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