It is mixed for about 2 hours with some common chemicals and then allowed to cool.

VOA: special.2009.01.26

"This is actually a really cool piece. It's done by the Rosete-Aranda Company.

VOA: special.2009.09.23

It is how the body releases water to cool the skin.

VOA: special.2010.07.27

"Just watching it carry out is really cool."

VOA: standard.2010.08.03