Imagine one day fuelling your car with iron powder, rather than gasoline. That's the goal of some Canadian scientists who hope that metal will one day provide a cleaner, greener alternative for our vehicles. Researchers at McGill University have been studying the combustion capabilities of metal for more than a decade. Last week, they launched an experiment into space to gain further insight to this yet untapped potential. The experiment was designed to help scientists better understand how the metal particles react in weightlessness.