An alloy of copper and tin with a similar color to Nordic Standard copper finish. When exposed to the atmosphere, the surface will change gradually to a stable, dark chocolate brown or even black ...

This role is nothing new for copper—for thousands of years, it has catalyzed great leaps in human civilization. Many technological breakthroughs, from Bronze Age tools and Roman aqueducts to the ...

This story appears in the March/April 2017 issue of National Geographic History magazine. “To the King of Egypt, my brother. Thus says the King of Alashiya, your brother: ... Send your messenger ...

Gold may be enjoying a record run this year, but the precious metal’s stodgier industrial metal cousin copper is shining, too. That rally may fade, though. Copper prices have taken off ...