When Congress opened U.S. public lands for mining in 1872, the nation was less than a century old. Miners used picks, shovels ...

The scale of some of the mines in the Silver Valley is hard to grasp ... Ore veins are followed into the rock using a series of tunnels or stopes that branch out from vertical shafts.

the surface of a hard rock is heated by burning sapwood to make it brittle before mining. In Japan, the oldest known example of this method is believed to have been used at the Nobesawa silver ...

In this episode, Peter chats with Silver Mines (ASX:SVL) managing director Jo Battershill after the company lifted the estimated resource at its Bowdens silver project in New South Wales to 71.7Moz.