11 years ago
1
6 Mind-Blowing Substances That Laugh in the Face of Physics
These materials are often hard to get and/or incredibly dangerous, but they're worth it for the cool factor alone.
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http://www.cracked.com
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"This happens precisely because sulphur hexafluoride is several times heavier than regular air, so it lowers the frequency of any sound passing through it, which is exactly how helium works, except, you know, in reverse."
This! I wanna get my hands on some of this!