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.▀▀▀You'll find our full back catalogue of hundreds of videos on ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠YouTube⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ . For early access videos, bonus content, and to support the channel, join us on ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠Patreon. ⁠⁠⁠⁠⁠

Veritasium

Ve - An element of truth. Veritasium is a channel of science and engineering videos featuring experiments, expert interviews, cool demos, and discussions with the public about everything science. The channel has over 18 million subscribers and 3 billion views on YouTube. You'll find our full back catalogue of hundreds of videos on ⁠YouTube⁠ - https://www.youtube.com/@veritasium. For early access videos, bonus content, and to support the channel, join us on ⁠Patreon - https://www.patreon.com/c/veritasium.

• No. of episodes: 90
• Latest episode: 2025-08-23

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