Because the objects had a standardized weight, scientists suggest they were a form of currency used some 3,500 years ago.
The Nebra sky disk, which has been called the oldest known depiction of astronomical phenomena, is a “very emotional object.”
In her latest work of graphic nonfiction, Lauren Redniss recounts what happened when a copper mining company decided to develop an Arizona tribe’s land.
Residents of the Papua New Guinea region have accused the mining giant of environmental and human rights violations and asked for an investigation.
Pandemic fears have created interest in metallic products touting antimicrobial properties. But experts have doubts about the copper craze.