Watching liquids boil in low gravity is an out-of-this-world experience. It has plenty of entertainment value, but it’s teaching scientists some important physics lessons, too. - NASA

Without buoyancy or convection, boiling fluids behave quite differently in space. Click here to watch a QuickTime movie (400 kB) comparing boiling in space and on Earth. Also available in high resolution (4.3 MB). Image courtesy NASA Glenn Research Center.

Source:
http://science.nasa.gov/headlines/y2001/ast07sep_2.htm