> Somewhat recently there was an article in the newspaper about a set of experiments that had been conducted which strongly suggested a three-dimensionally flat universe. It made sense at the time, but I've forgotten how they did it--timing radiation bursts from (or at?) different places. Of course, one could always argue that if the hypersphere were big enough, it'd be too hard to detect the time differences.

(-: A new article, really? I always prefer experimental evidence over theory in testing the viability of a multi-dimensional universe. If memory serves me correctly, last time you (gabby) and Balanthalus discussed cosmology, it was over the existence of an 11-dimensional universe. Bal also said that current theory asserts the universe is *curved* with no boundaries, just as a circle has no endpoints.

So we seem to to progressing in a retrograde fashion... Basically, some physicists want to collapse the concept of 11 space-time dimensions (including 3 quantum-microtemporals) back down to the traditional understanding of 3 ordinary spatial dimensions in a *flat* universe?