Sorry for the title, couldn't find a better one.
A few years ago I read on a scientific magazine about a discovery, but I can't remember the name nor find anymore information on it. Basically they discovered that by emitting certain sound waves in the direction of a water container created in water itself microscopic short-living bubbles at very high temperatures (maybe in the order of millions of degrees?)
I've lost the magazine, and as I wrote I tried to find information for a long time, but with no luck. Does anybody has a clue about what I'm talking about?