Using powerful computer simulations, researchers from Brown University have identified a material with a higher melting point than any known substance. The computations, described in the journal Physical Review B (Rapid Communications), showed that a material made with just the right amounts of hafnium, nitrogen, and carbon would have a melting point of more than 4,400 kelvins (7,460 degrees Fahrenheit). That's about two-thirds the temperature at the surface of the sun, and 200 kelvins higher than the highest melting point ever recorded experimentally. The experimental record-holder is a substance made from the elements hafnium, tantalum, and carbon (Hf-Ta-C). But these...
