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"



  • not a profi

    not a profi

     1 hours ago

    Wait a minute. So you compare 1 mm glass to 1 cm aerogel? and aerogel was only two-four times beter? i.e. with the same thickness aerogel is much worse?
    And instead of using something small you use a huge bunny so hot air gives you an excuse for it melting? wtf?

  • John Hancock ahh

    John Hancock ahh

     6 hours ago +1

    We need aerogel condoms!

  • Hipster Potato

    Hipster Potato

     10 hours ago

    My question is: can i eat it?

  • a basic white, gay girl name

    a basic white, gay girl name

     15 hours ago

    i wonna cronch it

  • Goinqfine


     1 days ago

    Me: Breathes
    Mom: iTs BeCaUsE oF tHaT dAmN pHoNe

  • superfluous pastry

    superfluous pastry

     1 days ago

    I never found the fluid to be super-critical. It offers constructive criticism but people take the fluid's snarky delivery as it being judgmental.

  • HeyItzRane


     1 days ago +1

    S Q U I S H I T

  • kennaramie15


     2 days ago

    i wanna eat it

  • the golden apple

    the golden apple

     2 days ago

    I want to touch it

  • Warren Kuhn

    Warren Kuhn

     2 days ago

    Why did you put the bunny back in the box ?

  • night_creeps


     2 days ago

    remove all the air and see what it makes lol



     2 days ago

    waiting for daily dose of internet sees this

  • enjoyableJaden


     2 days ago +1

    Me: sees this

    My brain: e a t i t

  • Hope Constantinides

    Hope Constantinides

     2 days ago +1

    Does anyone just want to touch it? Just me?

  • XShadow TempetureX

    XShadow TempetureX

     2 days ago

    I expected this thing to float away...

  • Pearlescent


     2 days ago +1

    What if they made a whole house out of it? Would I be able to pick up a house?

  • Julio Ackvon

    Julio Ackvon

     2 days ago

    Okay so if you could remove the air in the aerogel to make it lighter and you didn’t then it clearly isn’t the lightest solid

  • wildrose39


     2 days ago

    Poor chocolate bunnies, they were so young and sweet and melty and yummy and where was I............😊🐰

  • Clare Thomas

    Clare Thomas

     2 days ago

    That’s so odd

  • Rubber Ducky

    Rubber Ducky

     2 days ago

    Forbidden Jello