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 ...

Since the triple bottom last autumn, Gold is up $430 or nearly 27%. Silver is up 50% over the last eight months. With an overbought weekly chart and growing negative divergences, the air is getting ...

Solar stills provide a clever and simple means of purifying dirty or salty water, but they work at a rather slow rate. A new material has been shown to boost their performance, and it's made from ...