If you are in need of a lesson on just how much things have changed in the last 60 years, an anecdote from my childhood might suffice. My grandfather was a junk man, augmenting the income from his ...

A restart study has demonstrated strong technical and robust economic support to restart silver/lead/zinc concentrate production at the mine. The study is based on a mine plan and optimised mining ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...