Rare earth metals: US startup discovers large-scale copper deposit in Zambia A significant copper deposit has been discovered in Zambia by a US startup. KoBold Metals is supported by a coalition of billionaires including Bill Gates and Jeff Bezos, as well as the venture capital fund Andreessen Horowitz. The discovery, made with the help of artificial intelligence, is certain to have geopolitical implications. FRANCE 24's Julia Sieger tells us more.