The result is just the right mix of H 2 and O 2 to convert back into water with a bang. [Peter Sripol] has built a charming desktop cannon in just such a way. The build consists of a contact lens ...

A South Korean farmer was seriously injured during a protest in 2015 when a police water cannon knocked him off ... each boast 15 high-pressure cannons. Tender documents show two cannons on ...