At very low temperatures certain gases and liquids undergo Bose-Einstein condensation -- a phenomenon first proposed by Einstein in 1925 -- in which atoms stop behaving independently, but march together in lock step. Only recently have physicists, using magnetic fields and lasers, been able to produce and study the astonishing properties of condensed gases of atoms. This research, recognized by the most recent Nobel Prize in Physics, is now leading to remarkable developments, such as atomic lasers, and matter in which light moves more slowly than bicyclists on campus

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