Veritasium: World's Lightest Solid!

Published on: Friday, May 31, 2019

World's Lightest Solid!

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"


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  • LuigiFan128


     51 minutes ago


  • FloppyFish2000


     5 hours ago

    Why do you need to be so scientific just use school toilet paper Ugh

  • ᄒᄒᄀᄒᄀ


     10 hours ago

    류승범님 한국어자막 감사합니다

  • Donald J Trump

    Donald J Trump

     21 hours ago

    Where do you buy this?

  • {- ThatSelfConciousSeaWing -}

    {- ThatSelfConciousSeaWing -}

     22 hours ago

    They should make the
    Suits for firefighters with aerogel
    That would be good

  • 제리뽀


     1 days ago




     2 days ago

    A YouTuber finally flew to my home state.🥳🥳

  • The Coon

    The Coon

     2 days ago +1

    I’m i the only one that thinks he looks like Elon musc

  • Геннадий Семенов

    Геннадий Семенов

     2 days ago

    Is there an aerogel made of a magnet ?
    Throw off the site or the development to me

  • Sabik Hossain

    Sabik Hossain

     2 days ago

    World second lighest solid is my wallet

  • Hannah Dowse

    Hannah Dowse

     3 days ago

    This is incredible and could be the start of smarter more ecological, a revolution for insulation in the world for homes and other things.

  • not a profi

    not a profi

     3 days 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

     4 days ago +1

    We need aerogel condoms!

  • Hipster Potato

    Hipster Potato

     4 days ago

    My question is: can i eat it?

  • a basic white, gay girl name

    a basic white, gay girl name

     4 days ago

    i wonna cronch it

  • Goinqfine


     4 days ago +1

    Me: Breathes
    Mom: iTs BeCaUsE oF tHaT dAmN pHoNe

  • superfluous pastry

    superfluous pastry

     5 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


     5 days ago +1

    S Q U I S H I T

  • kennaramie15


     5 days ago

    i wanna eat it

  • the golden apple

    the golden apple

     5 days ago

    I want to touch it