True Facts: Snake and Lizard Tongues

Dr. Kurt Schwenk
It was a pretty incredible gift to be able to work with Kurt on this episode. His work spans decades and it took multiple tries to understand it in a way that could be put together in a narrative. I am very grateful for all of his time, warmth and generosity. I had to leave many, many wonderful pieces of research and factoids out due to time constraints but I would urge any of you that are interested to dive deeper into his work.
His colleagues Dr. William G. Ryerson, Ms. Amanda E. Hewes and
Ms. Sara Horwitz contributed a great deal to some of the research that I mentioned.
Dr. Margaret Rubega ( deserves thanks for introducing me to Kurt in the first place.

Additional footage licensed from:
Envato Elements

жүктөп алуу


  • 'I'll give an arm and a leg to be the best at it' is now what I'm going to refer to whenever I talk about snakes.

    Greer McNallyGreer McNally31 мүнөт мурун
  • "When humans do this it's called an HR violation"🤣

    DeathLotusDeathLotusСаат мурун
  • Next time I see a snake I'm going to ask it what that tongue do😂😂

    charizard4321charizard43212 саат мурун

    Muneerah AdamsMuneerah Adams3 саат мурун
  • Please do a video on the small and well named bird called a bushtit...

    Kevin ParksKevin Parks4 саат мурун
  • “When humans do this, it’s called HR Violation” The ending: 10:18

    rc casanorc casano4 саат мурун
  • When human do its called HR [human rights] violations! Hahahaha LoL

    Rafael PasitoRafael Pasito7 саат мурун
  • Where is teddy now?

    Twisty99Twisty9911 саат мурун
  • "Tongue-Ball"

    MsSaraKirkpatrickMsSaraKirkpatrick15 саат мурун
  • Dammit, Jerry! Get it right! One minute in, and we're already yelling at you MULTIPLE TIMES!

    MsSaraKirkpatrickMsSaraKirkpatrick15 саат мурун
  • Teddy is still alive?

    GAME-X ADGAME-X AD15 саат мурун
    • Probably not

      Twisty99Twisty9911 саат мурун
  • God I want to go to therapy so I can call the therapist a brain witch despite their repeated insistence I stop.

    Stormy DavisStormy Davis16 саат мурун
  • 8:30 I rewound and even slowed it down me and the misses are dying and also copying it all day going randomly.....BLBMBMBLL

    MuglorgrimlockableMuglorgrimlockable17 саат мурун
  • This tongue will blow your mind. That’s what she said

    Christian TerryChristian Terry18 саат мурун
  • You should make videos for whales and sharks

    codeman7055codeman705521 саат мурун
  • All these lizards give me Schwenks

    S CO POS CO PO22 саат мурун
  • Use this as a "I was today years old when I found out worm lizards were a thing" button.

    Jesus jiu-jitsuJesus jiu-jitsu23 саат мурун
  • That mouth at the end was traumatizing

    Asani WilliamsAsani WilliamsКүн мурун
  • “When humans do this it’s called an HR violation” 😂😂😂😂😂😂

    Peter MeullerPeter MeullerКүн мурун
  • “Smyooth”

    Hunter ClwminsomHunter ClwminsomКүн мурун
  • I self-identify as a smarty nipple

    Anna MishonovaAnna MishonovaКүн мурун
  • wheres mr teddy

    PumkinnPumkinnКүн мурун
  • HR violation 🤣🤣💀💀

    Jose ArellanoJose ArellanoКүн мурун
  • HR violation :DDDD

    TheOnlyRealTapirTheOnlyRealTapirКүн мурун
  • 9:35

    Samuel VargaSamuel VargaКүн мурун
  • 9:25

    Samuel VargaSamuel VargaКүн мурун
  • 6:58

    Samuel VargaSamuel VargaКүн мурун
  • Why did i click while i was eating, i follow him since the start, i should have known better.

    Rukyura MykyRukyura MykyКүн мурун
  • It will blow something, but it's not my mind.

    Mr. WMr. WКүн мурун
  • I found someone trying to bite your style... but no one will ever say ... Baby's like you baby babys... that's what zefrank1 do......

    kl Chicagokl ChicagoКүн мурун
    • 5:27 on the video link

      kl Chicagokl ChicagoКүн мурун

      kl Chicagokl ChicagoКүн мурун
  • I love your videos. I learn things and they make me laugh.

    davidbwadavidbwaКүн мурун
  • I need evolution to wink at the rest of 2020 and all of 2021 please 🧡

    Butacup PucatubButacup PucatubКүн мурун
  • 😂😂😂 oh Zefrank, both hilarious and education, I nearly peed myself laughing

    NouraJNouraJКүн мурун
  • Can you make a true facts video about kiwis? The bird not the fruit XD

    EternalBear AnimatesEternalBear AnimatesКүн мурун
  • "Smyoothe"

    Iverson Paul AlayIverson Paul AlayКүн мурун
  • During this little snake rave

    Codeman785Codeman785Күн мурун
  • Could you da a video about the weirdest species of all... the HUMAN?

    Mo NaMo NaКүн мурун
  • How can such a simple animal be so complicated

    harrison simharrison simКүн мурун
  • Brain witches lols, that's a far more accurate job title for psychiatrists.

    Johnny WoodsJohnny Woods2 күн мурун
  • I can't believe this is the same guy who did teddy has an operation

    Owain ThomasOwain Thomas2 күн мурун
  • the way he describes things is the most realistic i have ever seen

    happy manhappy man2 күн мурун
  • This is how a healthy bon bon looks like

    alex balfanzalex balfanz2 күн мурун
  • So that's what my tongue and lower lip look like slowed down when I make fart noises...

    fds fdsfds fds2 күн мурун
  • This one is absolute wall to wall 24-carat GOLD. A masterpiece. Just wonderful. Love your work, Ze.

    Massage Dot MelbourneMassage Dot Melbourne2 күн мурун
  • No animals were harmed during the filming of this video but they died because of laughter 😂😂

    d_piyushd_piyush2 күн мурун
  • Ok that at the end was just excessive.

    futsk01futsk012 күн мурун
  • These documentaries are so fukking awsome!

    Chris MacLeanChris MacLean2 күн мурун
  • "It's called an HR violation." That one got me good.

    Travis BTravis B2 күн мурун
  • I hate this, and I love this

    Kevin PerryKevin Perry2 күн мурун
  • I’ve watched this about a dozen times, it’s just so great

    deanthebean gamingdeanthebean gaming2 күн мурун
  • Zerfrank: True facts about the Tyrannosaurus Shreks... ...oh wait hold on That’s a typo... True facts about the Tyranosaurus Sex... Jerry is this another typo? Jerry: ... Zerfrank: No? What do you mean it’s your browser history give me the actual script.

    Nothsa RekcapNothsa Rekcap2 күн мурун
  • 6:17 sorry, still here, and now I have subscribed

    DevilofetherDevilofether2 күн мурун
  • "It's sort of like they can smell in stereo." This is absolutely brilliant! As a veterinarian i'll always remember that humorous phrase in my lectures!

    Higor AraújoHigor Araújo2 күн мурун
  • the outro is epic

    Long HoangLong Hoang2 күн мурун
  • OK like if you stuck out your tongue and tired to flick it up and down when he said that hahaha

    Andrew PearsonAndrew Pearson2 күн мурун
  • hey remember ur teddy bear operation vid, haha. i watched that when i was like 6 👋 anyway hello again sir

    Meru MeMeru Me2 күн мурун
  • The human tongue was the most disturbing

    Timi HazeTimi Haze3 күн мурун
  • I had to pause midway through because I laughed so hard I spit my noodles onto my computer.

    Kerry GodboutKerry Godbout3 күн мурун
  • Dude I love your videos. I formative and extremely hiladious

    rasheed gregoryrasheed gregory3 күн мурун
  • "...HR violation." You are a funny man. xD

    Angela BartlettAngela Bartlett3 күн мурун
  • I love this man and his content with every fiber of my being

    DiadorimDiadorim3 күн мурун
  • One of the best videos that came out on my birthday

    MönkeyMönkey3 күн мурун
  • S.T.E.R.E.O. TONGUES!!!

    Michal ŠepsMichal Šeps3 күн мурун
  • From now on I'm calling psychiatrists "brain witches"

    yashuayashua3 күн мурун
  • Butt molecules in the air

    Sergio Di MartinoSergio Di Martino3 күн мурун
  • "Can't fool me, Brain Witch!" 🤣

    Sam ESam E3 күн мурун
  • How many of you actually tried flicking your tongue in the air?

    DoomFinger511DoomFinger5113 күн мурун
  • I can never go back to normal docs. I have been spoiled by zefrank and the art of the info doc comedey.

    nonya businessnonya business3 күн мурун
  • Can't fool me, brain witch!

    Rusty ShakelfordRusty Shakelford3 күн мурун
  • #Thankmas

    DiscoChixifyDiscoChixify3 күн мурун
  • Oh man this is one of the best ones yet! BRAINWITCH, Seriously how does he so accurately and succinctly describe that profession?!?! LOVE IT

    Rhett ShumwayRhett Shumway3 күн мурун
  • smewth

    CarbohighstakesCarbohighstakes3 күн мурун
  • That ending shot was disturbing in many ways...

    bocoy noiubocoy noiu3 күн мурун
  • This tongue will blow up your bicycle tires.

    Hookie DooHookie Doo3 күн мурун
  • "Deep throating a squirrel's butt" Aaaallright, that's enough of that for today.

    White Fire ProductionsWhite Fire Productions3 күн мурун
  • I've own snakes, monitors and other lizards... Men should take notes!!

    Lady TempestLady Tempest3 күн мурун
    • @bocoy noiu great way to get a raise. Pun intended!!

      Lady TempestLady Tempest3 күн мурун
    • When human do this it's called an HR violation 😂😂😂😂

      bocoy noiubocoy noiu3 күн мурун
  • hehe butt molecules

    naik naiknaik naik3 күн мурун
  • He’s back

    Jack DavenportJack Davenport3 күн мурун
  • All shag carpets are shag carpets of doom.

    Jarred UysJarred Uys3 күн мурун
  • the last 10 seconds.......scarred forever

    adrian427adrian4273 күн мурун
  • Pls do a colab with David Attenborough.

    DeadpoolDeadpool3 күн мурун
  • Why is no one talking about the end-

    sally castersally caster3 күн мурун
  • But why do the snake do? Dr. Schwenk know why!

    Sarafina DeliriumSarafina Delirium3 күн мурун
  • My cat enjoyed your lizard/snake tongue video too XD

    Adelphos89Adelphos893 күн мурун
  • XD awesome

    Bark BarkBark Bark4 күн мурун
  • One of my favorite videos you guys have ever done! The science and jokes in this one are so good 😂

    Kelsi Van DammeKelsi Van Damme4 күн мурун
  • Jobs that no-one wants #5438: product manager at Evolution, Inc. "Are you actually shitting me with this? All our users said they needed some way of cleaning and protecting their eyeballs. So we gave them Eyelid v1.0. Now this one user, Gordon effing Gecko, says "naah, fam - I don't want eyelids. I wanna lick my eyeballs clean." Sure, pal - we'll put it in the backlog.

    T JT J4 күн мурун
  • after watching 5 of your videos, i realised you made research results interesting and fascinating for learning. also there is your narrating skill and the fact thats its funny.

    Karan AryaKaran Arya4 күн мурун
  • Can you make a video about the blobfish

    Alaster CuteAlaster Cute4 күн мурун
  • Stop being funny and smart at the same time, that’s not how it’s meant to work.

    Blizzardfire 79Blizzardfire 794 күн мурун
  • When human do this it's called an HR violation 😂😂😂😂

    Zach ZhangZach Zhang4 күн мурун
  • 1:33 Monitor lizard who did it without losing their limbs: Listen here youths, sometimes you have to be stubborn to get the best of the two worlds. Sneks: What Boomer. Monitors: Bruh.

    Shasvin PuvanesvaranShasvin Puvanesvaran4 күн мурун
  • Never get into an elevator with a bunch of snakes. If you fart they will all know it was you. Noted.

    Banana JuntaBanana Junta4 күн мурун
  • Smarty nipple lol

    Banana JuntaBanana Junta4 күн мурун
  • "I'll give an arm and a leg to be the best at it"... and they literally did just that :-P :-D

    Moumanti PodderMoumanti Podder4 күн мурун
  • ohhh this was so goooddd

    Dan VelardeDan Velarde4 күн мурун
  • Jerry's script remains wild. "Jerry, that's not a snake." "No, Jerry, it's not a fetish. When a scientist does it it's an area of interest."

    dcoog anmldcoog anml4 күн мурун
  • Best yet.

    Steven MagasisSteven Magasis4 күн мурун
  • Lol I was just talking to my nephew about licking stamps yesterday! Oh how kids will never know. I love when I run across this channel.

    b sb s4 күн мурун
  • "But the snake ancestor pulled evolution aside and said, 'I'll give an arm and a leg to be the best at it.'" I see what you did there.

    VidralliaArchivesVidralliaArchives4 күн мурун
    • I could stomach all the sticky mucous riddled freak tongues caressing maggots like sweet candy, but that outro was just grotesque!

      dcoog anmldcoog anml4 күн мурун