An aluminium-foil boat floating in sulfur hexafluoride: a colourless gas that's heavier than air (and that makes your voice deeper if you breathe it in – it's basically the opposite of helium). https://t.co/Cd0wKYG2Z1 pic.twitter.com/d7Fa3LKj9a
— Steve Stewart-Williams (@SteveStuWill) February 3, 2020
Thursday, March 5, 2020
I see wonderful things
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