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The richest discovery in the history of mining occurred in 1873. This so-called "Big Bonanza" made

_______ the richest man in the world



User Locket
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This so-called "Big Bonanza" made "John William Mackay" the richest man in the world, since the discovery led his business shares to the point where he was valued at roughly 1 billion dollars.
User Coterobarros
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