Science News reports on a paper to be published in Physical Review Letters in which an international team of researchers describes their computer simulation of the most violent collision imaginable: two black holes colliding head-on at nearly light-speed. Even in this extreme scenario, Roger Penrose's weak cosmic censorship hypothesis seems to hold — the resulting black hole (after the gravitational waves have died down) retains its event horizon. "Mathematically, 'naked' singularities, or those without event horizons, can exist, but physicists wouldn't know what to make of them. All known mechanisms for the formation of singularities also create an event horizon, and Penrose conjectured that there must be some physical principle — a 'cosmic censor' — that forbids singularity nakedness ..."

Nieske writes "Prices and the release date for Windows Vista have leaked online. Ed Bott's Microsoft Report has information on pricing, and the release date is currently January 30th, 2007. Are they really going to make the deadline this time?" From the ZDNet article: "In Canada, at least, the rumors of a 'modest' price increase were true, based on this list. Will these same relative prices hold true in the U.S.? Who knows? But if they do, then it's mostly good news for Windows customers. There's no price increase for Home Basic. Home Premium, the Vista version that maps most closely to the OEM-only Windows XP Media Center Edition, will finally be available as a retail product for a slight bump over the Home Basic product, similar to the $39 premium typically charged by large OEMs for Media Center upgrades. And Vista Business buyers will get a break with a small discount relative to XP Professional."