Seems there's a company in Japan that says they've built a car that runs on water. Supposedly, they have a "membrane electrode assembly" that breaks water into hydrogen and oxygen; they then use the hydrogen to generate electricity, producing water as the result. Sounds too good to be true? Then it almost certainly is (actually, I would state it more strongly than that). By comparison, cold fusion is very believable. What's really impressive to me about this is the speed of creation of a quality Wikipedia page on the matter. The company had a press release on June 12, 2008, and the Wikipedia page was up on June 14.