For the first time, physicists have captured direct images of 'second sound,' the movement of heat sloshing back and forth within a superfluid. The results will expand scientists' understanding of ...

In most materials, heat prefers to scatter. If left alone, a hotspot will gradually fade as it warms its surroundings. But in rare states of matter, heat can behave as a wave, moving back and forth ...

Consumer Reports has no financial relationship with advertisers on this site. Consumer Reports has no financial relationship with advertisers on this site. The most common cause is a clogged drain ...