Humble fragments of clay crucibles and coin molds flecked with gold excavated by a joint team of British and Malian archaeologists in 2005 led archaeologist Sam Nixon, in consultation with Thilo ...

According to the World Gold Council, about 195,300 tons (177,200 tonnes) of gold have been dug out of the ground in all of human history. Countless lives have been lost obtaining the rare metal, and ...

Nearly 20 percent of the world’s gold supply is produced by workers in artisanal and small-scale gold mining shops that purify gold by burning off mercury. Researchers have teamed up to stop this ...

Researchers have developed an environmentally friendly method for recycling and purifying metals. Using gold earrings from a pawnshop in Gothenburg and biodiesel from the nearest filling station, the ...

Chalmers University researchers develop a sustainable method for gold recycling using biodiesel. The method effectively extracts pure gold from mixed metals and is applicable to other socially ...

Medieval stained-glass windows colored in gold nanoparticles help purify air when lit by the sun, a new study finds. "For centuries people appreciated only the beautiful works of art, and long life of ...