In a hot summer Sunday braai or shisa nyama (South African barbecue), if you don't finish your favorite beverage quickly, the ice cubes will melt and the drink will get warm—undoubtedly spoiling your ...

Heat flows from hot to cold objects. When a hot and a cold body are in thermal contact, they exchange heat energy until they reach thermal equilibrium, with the hot body cooling down and the cold body ...

Researchers have developed a method to control the direction of heat flow in crystals. This miniature device could eventually be used to create advanced thermal-management systems in electronic ...

IT’S a cardinal rule that heat flows from the hot end of an object to the cold, no matter which end you heat. But now researchers have suggested a way to build a device that conducts heat in only one ...

Your lukewarm cup of coffee won’t suddenly heat itself up, no matter how long you put off the trek to the microwave. But the same rule doesn’t necessarily apply to quantum systems. Like chilly air ...

Can energy move from a colder to a hotter region in a material without violating the second law of thermodynamics? Yes, according to physicists from Trinity College Dublin and the Universidad ...