Aerogel is the least dense substance ever created, and is used in NASA space suits, and to make the world's lightest ping-pong ball...
posted by arvana![Ranked #8 - 74203 votes - 1651 star points](https://videosift.com/cdm/stars/01000.png)
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Aerogel is the least dense substance ever created, and is used in NASA space suits, and to make the world's lightest ping-pong ball...
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