World’s Lightest Solid!

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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50 Responses

  1. Marco gaming503 Game says:

    This is insane, super light but observe many heats,

  2. AlexandrovX ;-; says:

    So that’s a cube of air?

  3. StoneysWorkshop says:

    Youtube has recommened a lot of Aerogel videos lately, I chose to watch yours.

  4. AndyPlaysMobile says:

    Super Light Solid

    When Dropped Sounds Like Metal

    *Seems Legit*

  5. Internet’s Seer says:

    Everybody: This could revolutionize the world!

    My brain: lEmMe EaT iT

  6. Virtual PC Build says:

    Areogel : 99.8% Air
    Lays : Hold my chips packet


    1:31 animal abuse

  7. Nisse says:

    4:28 “Can i put my finger he-”
    *has already put his finger on the plate, right next to the open flame*

  8. jk sunshine says:

    Aerogel-the closest to air

    My bank: are you sure about that


    • Ptyler Beats says:

      Your bank account is virtual. There is literally no air in the virtual space that your account makes up. It’s a virtually room that can hold an unlimited about of things. You just happen to not hav any in it. So you have no air and no money.

    • Lumpy109 says:


    • Emily says:


    • TheShizzlemop says:

      +Ptyler Beats it cant hold an unlimited amount of things, just because something is virtual doesnt mean it takes up 0 physical space. the data is stored physically.

  9. Stratowind says:

    Bunny: Aaargh, that’s hot that’s hot!
    * looks at aerogel *
    How good of an insulator are you?

    Aerogel: Yes

  10. somekid says:

    Derek: Explaining the complex science behind aerogel and it’s history
    Me: I eat

  11. Insane Wolf says:

    Aerogel- 99.8% AIR

    Lays: “I’m gonna end this man’s whole career”

  12. Rocket125 inYT says:

    *Lays:* Hold by chips
    *Me:* But you dont have chips
    *Lays:* Hold my plastic bag
    *Me:* ok.

  13. Angery Angery says:

    No one:
    Youtube Recommendations: Yo wanna see some solid air?
    Me: sure why not

  14. Just Your Everyday Pig says:

    This Video: almost 4 million views in 24 hours

    Youtube Trending: Nah fam

  15. RoyBrown777 says:


    YouTube: Worlds Lightest Solid

    Me: Yeah okay fine.

  16. World Border says:

    I guess buying a block of air is now a reality…
    But I already spent all of my money on *Lays’ stocks*

  17. Bwaap Bwaap says:

    “When they would build skyscrapers in antarctica, they’ll use aerogel.”
    – “Hahahaha… ye… why?”

  18. Aidan Lelliott says:

    Oh boy. His video went viral again…

    *_cries in corner_*

  19. Priyesh Shetty says:

    “Aerogel made from the farts of people”

  20. Technical Lucky!! says:

    Lol and I was thinking cotton is the lightest solid till now ,

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