True Facts: Snake and Lizard Tongues

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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




17 nov. 2020




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Commentaires 100
Texas Red
Texas Red Il y a 2 heures
"are the new viewers gone yet?" No its so funneh
Elroy da shogun
Elroy da shogun Il y a 3 heures
Me:Isnt a worm lizard a snake The scienctist:imma slap the shit outta yah
Autumn Mentink
Autumn Mentink Il y a 5 heures
"Are any viewers gone yet?" I'll admit I was eating breakfast and very nearly was.
aristideau Il y a 8 heures
the double entendre 'dad jokes' are really ugh
Jar Ray
Jar Ray Il y a 9 heures
u know, when i first heared of the guy Jerry i thought he was me as my name was also Jerry
PuPOp Pankek
PuPOp Pankek Il y a 10 heures
Do more videos about oppih
tigress63 Il y a 13 heures
There should be a video on the fig wasp
stu booth
stu booth Il y a 15 heures
Today's drinking game. Scroll through the comments, take a swig every time you see a direct quote from the vid. Good luck.
michel perreault
michel perreault Il y a 15 heures
Thank you so much for putting a smile on my face. Very funny to watch.
Sack fu
Sack fu Il y a 16 heures
So reptiles use their demon tongues to lick the ground, then snort up whatever they find through their mouth nostrils. Because snakes apparently have nostrils on the roof of their mouths.
Basil Southey
Basil Southey Il y a 17 heures
This is literally the best example of science communication I have EVER seen. Going to show this to classes I teach.
Anne Bruecks
Anne Bruecks Il y a 19 heures
I have now learned more interesting and in detail info than I did in 12 years of public education.
Krysta Monique
Krysta Monique Il y a 22 heures
😹😹😹😭 “Brain witch”
Nate Gawlik
Nate Gawlik Il y a 23 heures
Have you ever done a video on flatworms? I’m sure this would be entertaining
Laure_lei Il y a jour
Freaking hilarious, and what a champ the Doc is. Thank you for all the work that goes into these!!!!!
Ano N. Ymous
Ano N. Ymous Il y a jour
1:42 cute hognose
glfmn Il y a jour
TRUE FACTS ABOUT ORCHIDS A lot of orchids use sexual deception to get pollinated, and all kinds of other crazy strategies that often involve being mean to insects.
RINPLAYZ Il y a jour
“When humans do it it’s called an HR violation” ahhh I love this channel lmao
Benedict Zafra
Benedict Zafra Il y a jour
How Is Teddy?
2balive1 Il y a jour
Hey Frank. As one genius to another, I propose a market that will over double your cash market. I have always loved your humor and attention to detail. I know that this is only a love of leisure that you don't really need. Thank you for keeping on. You have the capacity to educate young minds with your great humor! If you are willing to make videos for children , you have the chance to grow greater than Bill Ney the "science guy". I would love to see you share your knowledge and humor with my son. He's 10. Please create this page. You might even get picked up by PBS if you do it right
john kleinsmit
john kleinsmit Il y a jour
zefrank. you need to teach public speaking at a local school
R S Il y a jour
I'm just bummed out that he didn't pronounce "tongue" as "tongewwwwwrr". Otherwise it was brilliant.
craxy d
craxy d Il y a jour
no matter how bad i feel, you make me laugh,love your vids. they keep me same in the insane world of 2020
Jaylilah Il y a jour
Pure, frikken brilliance! One of your best Zefrank!
cyberhawk80 Il y a 2 jours
when humans do it , it's called an HR violation.. thanks for the laugh in these dark times..
The Latvian Corsair
The Latvian Corsair Il y a 2 jours
0:40 Somebody's gonna get pregnant.
Dustin Ontaiyabbi
Dustin Ontaiyabbi Il y a 2 jours
We need to enjoy Zefrank while he is here. He's 48 years old.
Garret Key
Garret Key Il y a 2 jours
A few ideas. Platypus, otter, komodo dragon, spitting spider, moose, skunk, casowary bird.
Ladyhawk's Lair
Ladyhawk's Lair Il y a 2 jours
This was very informative. Seriously. I'm gonna need to watch this video again...and then get super slow-mo footage of my hognose snake's tongue. That perv, Dr. Schwenk, might pay me for it. J/K ;) I'm super impressed he figured out all this stuff.
A Mark
A Mark Il y a 2 jours
I love you so much so I just would like to take a moment and type out the appreciation. I appreciate this so much because this is a lot of time and effort and I'm learning So thank you lol
Ladyhawk's Lair
Ladyhawk's Lair Il y a 2 jours
6:21 "Are the new viewers gone yet?" XD I've loved _True Facts_ for years, but a friend of mine can't get past the Morgan Freeman voice. I'm tempted to tell him: "Morgan Freeman, Morgan Freeman, Morgan Freeman, Morgan Freeman...Morgan Freeman. Morgan. Freeman."
A Mark
A Mark Il y a 2 jours
Omg you know what I just thought of ..... this😑this😑this is like The Adult Swim of Animal Planet 🤫🤣
David Weiller
David Weiller Il y a 2 jours
Wow, fascinating video! Here is my take of an 🐍 Eyelash viper flicking its forked tongue:
Katherine White
Katherine White Il y a 3 jours
I finally lost it at "snowman's baby maker"
snikrepak Il y a 3 jours
Hr violation!!!!! Hahahahahaa
gottabesandi Il y a 3 jours
Thanks. Now I can never unsee a slow motion mouth blowing a raspberry. 👁👅👁
Edward Tiangco
Edward Tiangco Il y a 3 jours
I guess I'm a perv as well. 😅
life time
life time Il y a 3 jours
Dear Ze frank We mostly want true facts about a human. Please because thats how we do Sincerely -Life_Time0s
Doofus_ow Il y a 3 jours
At 6:49... Holy shit that had to b one of the best
краб Il y a 3 jours
Why is your voice so soothing?
Sung Ji
Sung Ji Il y a 3 jours
You're back!
Chandra Satrio
Chandra Satrio Il y a 3 jours
I swear to God, ZeFrank's work is just getting better and better but I couldn't tell which video that started it all. He seems just to start from 100 and just keep going forward.
PreBound Il y a 3 jours
Man, the laughs just don't stop when watching this. Comedic gold.
Kaido Vesternin
Kaido Vesternin Il y a 3 jours
oh my god the lizard with its leg-parts in the air, I could almost hear it go "weeee, look mom, no hands!"
Felix Il y a 3 jours
That timeline of all the funny moments he made had me dying! He seems like a great guy!
Chaotic Good
Chaotic Good Il y a 3 jours
This is how everyone should should learn about animals
Jürgen Kun
Jürgen Kun Il y a 3 jours
what that tongue do 😏
DB Il y a 3 jours
savana muddypaws
savana muddypaws Il y a 3 jours
Looks like Trump's tongue. #Stopthestupid Trump!
bassmith448 bassist
bassmith448 bassist Il y a 3 jours
Love the boobie music at the end too. Funky grooves in da house!!!!!!!
Jessie Jubilee
Jessie Jubilee Il y a 3 jours
“Can’t fool me brain witch.” 🤣
bassmith448 bassist
bassmith448 bassist Il y a 3 jours
I died when you said sinus infection!!!!
Leah C
Leah C Il y a 4 jours
4:25 made me die
LegendPhantom Il y a 4 jours
Looks like not only gonna blow my mind*
POV: You're here from teddy has an operation
Hallebumba Il y a 4 jours
i want: Costasiella kuroshimae
Proudly Brown
Proudly Brown Il y a 4 jours
"you try this. Try flicking your tongue up and down very quickly. When humans do this its called HR violation". One of the many jules.
Simond Frost
Simond Frost Il y a 4 jours
Bro, I died when he said HR violation. Your a genius!
ChogMils Il y a 4 jours
uhh how about true fact about zefrank1
LionGaming Il y a 4 jours
i love this Chanel
Korok Seed
Korok Seed Il y a 4 jours
I’m not gonna lie, this was actually super interesting
Torti Tongue
Torti Tongue Il y a 4 jours
I recognize your voice from dear kitten! Or you may not be the person who voiced/narrated in it... sorry if you weren’t, you got a very nice voice and some very funny content here though friend XD
Fluffy waffles fw.
Fluffy waffles fw. Il y a 4 jours
The end card terrifies me
pluspiping Il y a 4 jours
Is this the kind of page where I can say "I'm always a slut for fluid dynamics" and people will, like, Get It? Love the in-depth sciencey ness of this video, it's a real treat, and thank you Dr. Schwenk!
Martin Friman
Martin Friman Il y a 4 jours
Shit, this was seriosly educational 😅
FedBiker Il y a 4 jours
The sound at 8:31got stuck halfway between my hippocampus and neo-cortex and is now on infinite loop.
R3DLiFE Il y a 4 jours
lmfao !!!! factfull and funny !
Greer McNally
Greer McNally Il y a 4 jours
'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.
DeathLotus Il y a 4 jours
"When humans do this it's called an HR violation"🤣
charizard4321 Il y a 5 jours
Next time I see a snake I'm going to ask it what that tongue do😂😂
Muneerah Adams
Muneerah Adams Il y a 5 jours
Kevin Parks
Kevin Parks Il y a 5 jours
Please do a video on the small and well named bird called a bushtit...
rc casano
rc casano Il y a 5 jours
“When humans do this, it’s called HR Violation” The ending: 10:18
Rafael Pasito
Rafael Pasito Il y a 5 jours
When human do its called HR [human rights] violations! Hahahaha LoL
Twisty99 Il y a 5 jours
Where is teddy now?
MsSaraKirkpatrick Il y a 5 jours
MsSaraKirkpatrick Il y a 5 jours
Dammit, Jerry! Get it right! One minute in, and we're already yelling at you MULTIPLE TIMES!
GAME-X AD Il y a 5 jours
Teddy is still alive?
Twisty99 Il y a 5 jours
Probably not
Stormy Davis
Stormy Davis Il y a 5 jours
God I want to go to therapy so I can call the therapist a brain witch despite their repeated insistence I stop.
Muglorgrimlockable Il y a 5 jours
8:30 I rewound and even slowed it down me and the misses are dying and also copying it all day going randomly.....BLBMBMBLL
Christian Terry
Christian Terry Il y a 5 jours
This tongue will blow your mind. That’s what she said
codeman7055 Il y a 5 jours
You should make videos for whales and sharks
S CO PO Il y a 5 jours
All these lizards give me Schwenks
Jesus jiu-jitsu
Jesus jiu-jitsu Il y a 5 jours
Use this as a "I was today years old when I found out worm lizards were a thing" button.
Asani Williams
Asani Williams Il y a 5 jours
That mouth at the end was traumatizing
Peter Meuller
Peter Meuller Il y a 6 jours
“When humans do this it’s called an HR violation” 😂😂😂😂😂😂
Hunter Clwminsom
Hunter Clwminsom Il y a 6 jours
Anna Mishonova
Anna Mishonova Il y a 6 jours
I self-identify as a smarty nipple
Pumkinn Il y a 6 jours
wheres mr teddy
Jose Arellano
Jose Arellano Il y a 6 jours
HR violation 🤣🤣💀💀
TheOnlyRealTapir Il y a 6 jours
HR violation :DDDD
Samuel Varga
Samuel Varga Il y a 6 jours
Samuel Varga
Samuel Varga Il y a 6 jours
Samuel Varga
Samuel Varga Il y a 6 jours
Rukyura Myky
Rukyura Myky Il y a 6 jours
Why did i click while i was eating, i follow him since the start, i should have known better.
Mr. W
Mr. W Il y a 6 jours
It will blow something, but it's not my mind.
kl Chicago
kl Chicago Il y a 6 jours
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 Chicago
kl Chicago Il y a 6 jours
5:27 on the video link
kl Chicago
kl Chicago Il y a 6 jours
davidbwa Il y a 6 jours
I love your videos. I learn things and they make me laugh.
Butacup Pucatub
Butacup Pucatub Il y a 6 jours
I need evolution to wink at the rest of 2020 and all of 2021 please 🧡
NouraJ Il y a 6 jours
😂😂😂 oh Zefrank, both hilarious and education, I nearly peed myself laughing
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