A rice cooker that cooks food in half the time, saves electricity, keeps the food hotter for longer and more is actually tough to believe. But if seeing is believing, then set your sights on the new rice cooker. Sridhar Komarneni, a professor of clay mineralogy at Pennsylvania State University and colleagues in Japan made plates from a mix of 20 percent magnetite and 80 percent of a naturally occurring petalite mineral containing lithium, aluminium and silicon oxides. The new ceramic interacts