US West's abandoned mines hold danger and, for some, thrills Underneath the mountains and deserts of the U.S. West lie hundreds of thousands of abandoned mines, an underground world that can hold serious danger and unexpected wonder. via FOX BUSINESS NEWS https://ift.tt/2Oen9vy
Bill Gates firm buys Arizona land for $80 million to create 'smart city' A real estate investment firm owned by Bill Gates recently bought land in Arizona for $80 million to be developed into a “smart city.” via FOX NEWS http://ift.tt/2AD0x2i
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