this post was submitted on 24 Oct 2024
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Science Memes

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submitted 1 month ago by [email protected] to c/[email protected]
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[โ€“] [email protected] 5 points 1 month ago (1 children)

It's a room made from platinum-iridium, and kept in a triple-locked vault at the International Bureau of Weights and Measures in France.

[โ€“] [email protected] 3 points 1 month ago

unfortunately, opening the door changes the temperature, so in practice instruments are calibrated from copies of the room built at other metrology institutions around the world.