Science-fiction often proceeds science-fact. The latest one is the possibility that future events can affect the past, at least at the quantum level. As Doctor Who said, > Wibbly, wobbly, timey, wimey. Or perhaps a little more elegantly ... > "The future can affect the past, even though the past

There was an interesting letter in this week's New Scientist about Dark Matter, that implies that it's existence is not open to question. The Letter > New Scientist has developed an annoying habit of declaring confidently that "Dark matter makes up 80 percent of the