21.   The Chandra study, experts say, confirms theories by showing that the early universe teemed with active black holes, spewing X-rays across the heavens.

22.   If the crash theory is confirmed, this would be the worst air disaster in Russia for nearly two years.

23.   The team also conducted experiments to confirm a theory that particles in space tend to attract each other and form dust clouds.

24.   The crew of the shuttle Columbia conducted experiments Tuesday to confirm a theory that particles in space tend to attract each other and form dust clouds.