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jaycroft
on Sept 5, 2023
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The Federal Helium reserve is for sale
283 meters, not 2.83km. Still big though. The helium is stored underground in a salt dome (that was once full of natural gas). See here for more:
https://en.wikipedia.org/wiki/National_Helium_Reserve
pmontra
on Sept 6, 2023
[–]
You are right, 283 * 283 * 283 = 22,665,187
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