Abstract: features metallic foam s Many su b stan cesaq ueous solutions, polym ers and glass-can be foam ed.Foam ing m etals is a challenge, m ade difficult by th e high tem peratures n eed ed and th e reactivity o f the m olten m etal.Only recently has high quality m etallic foam been possible.It's an intriguing material for th e n ew m illennium and may soon be used to im prove car p assen ger safety John Banhart, G erm any