On Thursday, the U.S. government sold the Federal Helium Reserve, a massive underground stockpile based in Amarillo, Texas, that supplies up to 30% of the country's helium. Once the deal is finalized, ...
Deep within the grasslands of southwestern Tanzania, seven men were gathered on a gravel patch the size of a tennis court. They wore white helmets and yellow, oil-smudged overalls, giving the ...
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