Fact articles should be about 4,000 words in length and should deal with subjects of not only current but also future interest, i.e., topics at the present frontiers of research whose likely future developments have implications of wide interest. Necessary images should be provided by the author in camera-ready form.

Our readers are very intelligent and technically knowledgeable but represent a very wide diversity of backgrounds. Thus specialized jargon and mathematical detail should be kept to a necessary minimum. Our audience largely reads us for entertainment, and a suitable style for our articles is considerably more informal than many professional journals.