True Facts: Snake and Lizard Tongues

Opublikowany 17 lis 2020
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


  • This proves even Christians didn't know what they were talking about when they said "intelligent design." If God was real, he was a freakin' engineer.

  • Cant fool me, brainwitch!

  • The ending is kinda gross

  • 1:25 that's the kind of joke I like, keep it ccoming.

  • I really hope Dr. Schwenk watched this

  • "they can smell in stereo" just blew my mind

  • When a human does it its called an HR violation. lol

  • Look, these videos made me believe in god because something would have to be drunk to make these weird ass things

  • The number of times I have to pause and rewind because I can't hear over my own chortling 😆 this fucking channel Great stuff!!! The comedy for sure, but the info as well, is so well laid out and deeply fascinating. Subscribed!

  • called me out on the tongue flip! lol

  • 3:15

  • the cameleons are the actual xenomorph adults

  • When you ask a doctor for notes on a video and he returns with timestamps of every comedic reliefs...

  • Dacter Sczwenq.

  • I fucking love you

  • I feel as if Jerry is a figment of Frank’s imagination.

  • The new viewers left but to come back with others

  • brain witches...thats wht im calling my psychologist from now on!

  • They listen in stereo. You got me there

  • Educational....and a hoot ! If only biology classes had been like that when I went to school...

  • That HR violation part killed me!!

  • “It looks like those ink blots that the brain witch makes you look at” 😂

  • ‘A model of engineering’ amazing what an unconscious spiinning cooling ball of rock can “evolve” into...

  • I was watching your older videos posted about 8 years ago and noticed the newer videos are longer and you're speaking much faster now. Also it has gotten more informative instead of just being short, silly and funny vids of the old ones


  • You are the best

  • "brain witches"

  • "how do tiny molecules on the bottom of the tongue tings get to little holes in the mouth on the top?" my favourite quote so far

  • Can't fool me Brain Witch. Your humor is evolutionary Good Sir!

  • Never trust a Schwenk, always so tongue in cheek...

  • I lost it at the lizard with its legs held up

  • I freaking love ur vids lmao

  • "I know what you're thinking you naughty bunglet"

  • Who is Jerry by the way?

  • "Are the new viewers gone yet ?"

  • This awoke something in me that I'm not comftable with.

  • The brain witches... BOYS HES DONE IT AGAIN

  • Am I the only one who tried to flick their tongue up and down when he talked about it.

  • So... I listened to this one. I just can't watch snakes and lizards this long without a full on freakout.

  • Because that is how the zefrank, do.

  • Great video loveybug xoxoxo

  • Your teaching method is genuinely incredible. Please dont stop ❤

  • Brain witches XD

  • "Okay so uhhh we were thinking of putting some.... sex jokes? And we were wandering if we could?" Zenfrank: "yes" "OH great ... but um how many should we put?" Zenfrank: *"yes"*

  • How it’s actually made: reptile tongues

  • Humor the best teacher...

  • Really cool video ....kinda weird but cool

  • I am not ok with human tongues in slow motion.

  • Dr shrank goes deep with tounges? Hmm... fascinating

  • Snowmans bebemakers

  • @2.54 - that is some masterful tongue twisting narration right there, hehe. Pun intended.

  • done for today's tongue lesson

  • An HR violation.

  • You're HILARIOUS!!!


  • 10:23 seriously how to do that

  • Please do a collab with Sam o nella!

  • "Try flicking your tongue up and down very quickly. When humans do this, it's called an HR violation."

  • We didn't get a "Evolution and Snake" discussion when the snake discovered its jaws could separate? 🤣🤣🤣

  • "Flick your tongue up and down very quickly... when a human do this its called an HR violation..." aaahahahahahaha!!!

  • From Ausrtalia: This channel has the BEST narration of any documentary channel by miles.

  • ...farted in a law firm's elevator. All the suits turned to me.

  • brerouh

  • an hr violation

  • I think Harris would have this by a landslide!

  • These would be so great without the overdose of religious babble.

  • That was both hilarious and incredibly informative! Thank you so much to telling me about this weirdness!

  • 4:30 thanks for the heads up, I was at work when you told me to do this. Now I'm on my last write up, and have to attend weekly meetings.

  • “Are the new viewers gone yet?” If they are they don’t deserve you mate. Fucking amazing as always ahahah

  • Is a worm lizard not just a snake

  • “Can’t fool me, brain witch.” I haven’t laughed that hard in awhile.

  • I am definitely going to update Linkedin to include my qualifications as a brainwitch.

  • You little smarty nipple.

  • 8:27 "This cricket thinks it's having a shitty gets worse. Wait for it!"

  • Shweink

  • Snake: I'll give an arm and a leg to be the best tongue smeller Evolution: ... make to 2 of each and the super lick-sniffer is yours.

  • The timor monitor is so cute.

  • And from this point on anyone smarter than me is a brain witch.

  • History Channel who? Instant sub

  • Ok yer. Frickin nuts!! And I love it - please don’t stop!

  • Can y’all do a true facts Bearded Dragon

  • 2:54 It almost sounds like he's rhyming.

  • Wow, hilarious. Your voice and humor reminds me of Morgan Freeman. Tongues are interesting in reptilians. I wonder if it is the same for amphibians???

  • 😂🤣😂💜💜💜

  • Can't fool me brain-witch. 🤣

  • You ever felt a chameleons tongue on your eyeball. Its weird.

  • "Brain witches"

  • Never laughed so hard and learned at the same time

  • i was doing the tounge thing until he mentioned the HR violation. It all came to me then

  • Holy crap that is freaking hilarious I would love to see him I am discovery channel or animal planet that something that would definitely pay for

  • Smeoothe is my new favorite word. Thank you Ze. ❤️

  • "Now this cricket already thinks it's having a sh☆tty day.. It get's worse.. Wait fot it... Blllbbblb" 🤣🤣

  • The jokes are funny but there are too much dong jokes

  • "or take half a Viagra"

  • The best comentating I ever saw😭💯

  • If human flick it's tongue it's an HR violation I crack 😆😆

  • Oh shit, Brain Witch.

  • I feel disgusted with the human tongue at the end ;-;

  • Can you do a video on Sea Otters?