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Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

NEW JERSEY — An unstable crater in the forest floor is just another reminder of the state's rich mining history and the many tunnels left behind and hiding just under the surface. Timothy Rack stands ...

RESTRICTED USE The most effective means of ensuring that redundant shafts are not occupied by illegal miners is to permanently seal shafts FORMER GLORY If shaft capping is executed properly, it is ...