Most materials melt when heated, on other words, they change from a solid to a liquid state. But a few nonconformist materials do the opposite, they melt as they get cooler. A team of MIT researchers has now discovered that silicon, which is the most widely used material in computer chips and solar cells, can display this bizarre property of retrograde melting if it contains high concentrations of certain metals dissolved in it. The finding could lead to applications in solar cells and other devicesRead more