Ex-NASA Engineer Uses Science to Transform Hot Tub Full of Sand into “Liquid Soup”

Ex-NASA engineer Mark Rober specializes in making science fun and exciting via his YouTube channel, which has over 2.5 million subscribers. And recently, after 25 attempts, he was able to transform sand into liquid, making for a unique dip in the hot tub for him and his nephews.

From floating rubber duckies to sinking in like quicksand, it's amazing to see how the sand goes from solid to liquid in seconds. And in between all the laughs and GIF-worthy moments, Rober packs the video with interesting information. Using a process called fluidized beds, he was able to transform the behavior of the solid, having it act as a liquid. It's a phenomenon that has industrial applications, but Rober wasn't able to find information to make the sand pool he was envisioning so he poured through industrial patents to get ideas.

So how does it work? By introducing the right amount of air into the bed, it begins to move just like a liquid. The minute the air stops, the sand solidifies. After noticing that industrial designs showed many small air holes, rather than one large inlet, he began tinkering with the correct number and spacing to make his dream a reality.  And after many failures, his liquid sand fantasy finally came to life. Watch the video to see exactly how Rober's liquid sand hot tub works and the fun he had surprising his nephews.

Ex-NASA engineer Mark Rober turns sand into liquid in an entertaining video that shows how fun science can be.

Mark Rober Liquid Sand Experiment

Mark Rober Liquid Sand Experiment

The liquid sand experiment—caused by a process known as fluidized bed—can be replicated using just a few simple tools.

fluidized bed mark rober

how to make liquid sand

Ready to make your own sand hot tub?

Mark Rober: YouTube | Facebook | Instagram
h/t: [DesignTAXI]

All images via YouTube.

Related Articles:

Thriving Garden in Sealed Bottle Hasn’t Been Watered in Over 40 Years

Awesome GIFs of Scientific Experiments

Teacher’s Science Experiment Reveals the Gross Importance of Washing Your Hands

Spectacular Science Experiment Photography by Caleb Charland

Jessica Stewart

Jessica Stewart is a Staff Editor and Digital Media Specialist for My Modern Met, as well as a curator and art historian. Since 2020, she is also one of the co-hosts of the My Modern Met Top Artist Podcast. She earned her MA in Renaissance Studies from University College London and now lives in Rome, Italy. She cultivated expertise in street art which led to the purchase of her photographic archive by the Treccani Italian Encyclopedia in 2014. When she’s not spending time with her three dogs, she also manages the studio of a successful street artist. In 2013, she authored the book 'Street Art Stories Roma' and most recently contributed to 'Crossroads: A Glimpse Into the Life of Alice Pasquini'. You can follow her adventures online at @romephotoblog.
Become a
My Modern Met Member
As a member, you'll join us in our effort to support the arts.
Become a Member
Explore member benefits

Sponsored Content