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:


  • Mir Faraz Ali

    Mir Faraz Ali

     42 minutes ago


  • For The Viewing Pleasure

    For The Viewing Pleasure

     3 hours ago

    What would happen if you were to toss a chunk of aerogel into the air. Would it fall slowly, or go the same speed as anything else?

  • Range rover Sport

    Range rover Sport

     4 hours ago

    My last nug from plug was that bushy. Full of air

  • Christine Harper

    Christine Harper

     9 hours ago +1

    Maybe one day houses will be insulated with a protective layer of this

  • Scarlet Bringas

    Scarlet Bringas

     9 hours ago

    wowie. a nerd. har har har

  • Kristie Bell

    Kristie Bell

     10 hours ago +1

    If it is 99 percent air why isn’t it flamible

  • Muath Alzahrani

    Muath Alzahrani

     15 hours ago

    6:18 That's what she said

  • Ninjen


     18 hours ago

    You sound so much like Phreak omfg

  • Happy Virus

    Happy Virus

     20 hours ago


  • Slimey Annihilation

    Slimey Annihilation

     20 hours ago

    Aahh i always need a subnautica materials in my room hehehe

    Fyi subnautica is a game that has aerogel as materials to build things

  • IlluminatiConfirmedNot


     21 hours ago

    Charles made a bet with Samuel Kistler
    Charles Learned to never bet with Samuel ever again

  • Lyra Cindy

    Lyra Cindy

     22 hours ago

    He looks and speaks like Yu Tsai in Asia's Next Top Model

  • ObsidianX


     22 hours ago

    aerogel looks like nata de coco lmao

  • Nainesh Vala

    Nainesh Vala

     22 hours ago

    I think worlds lightest solid should be a single strand of hair!



     22 hours ago

    so if it was filled with nitrogen will it fly

  • Silver Chopsticks

    Silver Chopsticks


    The applications for firefighters is enormous. The applications for war are frightening.

  • TheNapol TheNapol

    TheNapol TheNapol


    Patrick star: Touch

  • Monster man Bad ass

    Monster man Bad ass


    I just did a solid at high temperature lol

  • Wander Lander

    Wander Lander


    Is aerogel edible?

  • Christian Gamerboy

    Christian Gamerboy


    me thinks of dust