Maybe We Should Call It "Ice 9"?
You'd think we knew pretty much all there was to know about water, wouldn't you? Well, zap it with high-energy X-rays, subject it to extremely high pressure, and make sure the proportions of H<SUB>2</SUB> and 0<SUB>2</SUB> are <I>just</I> right and you get "a highly energetic material."