Morning Overview on MSN
US turns gold mine into a giant fridge for 15,000 tons of argon at -303°F
Deep under the Black Hills, the United States is turning a historic gold mine into what is effectively a colossal ...
ActionAdventureTwins on MSN
A gold mine so deep its lower levels are completely underwater
Deep inside a massive gold mine, exploration reaches a point where dry tunnels give way to flooded lower levels. Water has slowly filled sections once used for extraction, cutting off access to deeper ...
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