Great advances in technology in the recent decades of this century have made it possible to amass a wealth of experimental data of unprecedented scope and variety. Theory in the areas of Particle Physics and Astrophysics has been subjected to repeated revisions to cope up with the observed facts. Especially in the field of High Energy Physics exciting things have been happening. The Orthodoxy is becoming more tolerant to wild, if not crazy ideas and inventions of thought. In this backdrop, it might be desirable to survey the vicissitudes of the physical theory, hoping that we might learn something from the history.
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