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"Enigma variations," by John D. Barrow. New Scientist, 7 September 2002, pages 30-33.
This article discusses some of the fundamental numbers that arise in physics and cosmology, such as the fine structure constant. If these constants did not have exactly the values they have, the universe would be a very different place. Barrow, who directs the Millennium Mathematics Project at the University of Cambridge, describes theoretical work he carried out with collaborators to examine whether changes have occurred in the fine structure constant. ``Finding the complete explanation of these constants is the greatest challenge that physicists face,'' Barrow writes.
--- Allyn Jackson
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