The Inverse Leidenfrost Effect How Rwanda Built A Drone Delivery 3 months ago   08:38

Droplets levitate on a bath of liquid nitrogen and are spontaneously self-propelled. Thanks Audible! Start a 30-day trial and your first audiobook is free. Go to or text VERITASIUM to 500500.

Special thanks to Dr. Anaïs Gauthier
Physics of Fluids:

Self-propulsion of inverse Leidenfrost drops on a cryogenic bath
Anaïs Gauthier, Christian Diddens, Rémi Proville, Detlef Lohse, and Devaraj van der Meer
PNAS January 22, 2019 116 (4) 1174-1179; published ahead of print January 22, 2019

For a detailed description of the setup:

And self-propulsion is also seen:

Other recent (hot) Leidenfrost experiments that might be interesting:
* Leidenfrost wheels:
* Leidenfrost maze:
* Leidenfrost explosions:

Special thanks to Patreon supporters:
Donal Botkin, James M Nicholson, Michael Krugman, Nathan Hansen, Ron Neal, Stan Presolski, Terrance Shepherd

Thanks to Prof. Kevin McKeegan at UCLA for the liquid nitrogen

Filming by Raquel Nuno

Additional animations by Alan Chamberlain

Comments 1399 Comments

Anuraag Rapaka
4:46 Bernoulli's principle...??
btw Great video
talal zahid
you did not seem impressed by the Dr's intended application ... hmmm
can we somehow do this with air and glide on top of it? maybe ionize air and laser cool it and glide on top of it with a special vehicle
Daniel Martinez
DUDE! Safety goggles! Best practice.
:D Yes
Skype? Really?
michael bayer
... its GOD over the water in book Genesis - its first element 1.008 - its like GOD shiva as dancer on the dancefloor with 108 names or JHWH 10868 - building the universe - its cool man!
Left high preasure right low preasure, it will move from left to right.
Jan Girke
What is the name of the effect when you have dancing droplets of water on water and it has the same temperature?
vishu sharma
Please wear safety glasses
Matt Norman
@6:51 ... Vsauce, Micheal here
Shayne Finley
I never comment
But come on ...
No safety glasses !?
Fabi Voltair
Wow. The Dr. is super cute! :) Very intelligent too, without debate.
Nice video too :3
Daniel Delgado
I fell in love with annais
The Savior
you should try this with liquid oxygen that is insulated with liquid nitrogen
Rob Tol'vir
I heard freezing without ice crystals and am now excited to be cryogenically frozen and reanimated when people stop killing each other and cause suffering for profit.
The question is: Can a human be frozen quickly enough to keep them alive? Or would they still die even if you could freeze them quickly enough that you don't damage their DNA?
Matt Dixon
Forgot about inverse leidenfrost after listening to her accident for about 10 seconds 👌
Brandon Montgomery
Not very amazing at all.
Senpai Leylz
Why am i watching this? Like i actually understand whats going on LOL
Wolf Elkan
He does all this in his garage? This makes me want to break into his garage. Just have to get my hands on an IM-me...
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How Rwanda Built A Drone Delivery The Inverse Leidenfrost Effect 3 months ago   11:46

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