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 ...

Q. I have a 2006 Hyundai Sonata V-6 with 1,000 miles. There is a sound coming from rear of car while stopping. It is like a sloshing/swishing. At first, I thought it was the rear brakes, but it almost ...

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 ...