World's Lightest Solid!

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  • Published on:  Friday, May 31, 2019
  • Aerogels are the world's lightest (least dense) solids. They are also excellent thermal insulators and have been used in numerous Mars missions and the Stardust comet particle-return mission. The focus of this video is silica aerogels, though graphene aerogels are now technically the lightest.

    At one point Dr. Steven Jones literally held the Guinness World Record for making the lightest aerogel and therefore lightest solid. If you're interested in learning more about aerogels, let me know in the comments as there is a potential trilogy in the works...

    Huge thanks to Dr. Stephen Steiner and the crew at Aerogel Technologies. To find out more or buy your own aerogel sample, check out:

    Thanks to Dr. Steven Jones and Dr. Mihail Petkov at NASA's Jet Propulsion Laboratory

    And thanks to FLIR for loaning us the awesome high definition thermal camera. The footage is amazing!

    Special thanks to Patreon supporters:
    Donal Botkin, Michael Krugman, Ron Neal, Stan Presolski, Terrance Shepherd, Penward Rhyme and everyone who provided feedback on an early draft of this video.

    Filming by Raquel Nuno
    Animations by Maria Raykova
    Drawings by Mariel Solsberg

    Music From "Seaweed" "Swagger Stagger"
  • Source:


  • Gde Pradnyana

    Gde Pradnyana

     21 minutes ago

    What about the weight of one piece of salt?

  • lxxney Ig

    lxxney Ig

     8 hours ago


  • Dr Starbuck

    Dr Starbuck

     17 hours ago

    Science 🧬 saves too!! Favorite channel!

  • Aamien Gurung

    Aamien Gurung

     22 hours ago +1

    7:21 at this point I got the answer why the sky is blue yet transparent surroundings

  • kilgarragh



    make a car outof it, then it will go supa fast

  • i want yum

    i want yum


    Can you eat aerogel?

  • Vengat



    what we see, if we look the evening sky thro the aerogel ?

  • Jasveer Pooran

    Jasveer Pooran


    Elon musk, hey. 😆

  • Der Alles-Esser

    Der Alles-Esser


    The glass was much thinner. Would like to know how it would have been if it had been just as thick.

  • Chris de Haan

    Chris de Haan


    1931 go figure.

  • account game

    account game


    solid but nit waterproof

  • drago slayer

    drago slayer


    Could you eat it

  • Jacob Kim

    Jacob Kim


    Wow this is like Star Trek

  • Andrew Marv

    Andrew Marv


    That’s an actual hologram

  • Dis Digga Darren

    Dis Digga Darren


    i want to eat it

  • peppapohone Us

    peppapohone Us


    I'm selling some fresh air.
    Issue: It has some chips
    I didn't say lays .

  • Nadiaかわいくない



    Yooo... I wanna eat it

  • 김도원


     2 days ago

    직접 보고싶다.

  • Vinayak Arora

    Vinayak Arora

     2 days ago

    It's like water jelly😃... I want to eat that🤣

  • TNT games

    TNT games

     2 days ago

    The glass cract begous you did not move the fire begous onley one peace of the glass gets hot the other nog thats why it broke