Erich, Not sure if your link works. I found the article here http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2004/10/04/MNGM393GPK1.DTL

Quite an interesting read. Not sure why some people here think you're daft posting it.

"Positronium" sounds a bit like something that might power the Jupiter II spacecraft from the tv show Lost in Space!