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The fundamental constants of physicsA natural system of fundamental physical units c, ℏ, and mp is discussed, where c is the velocity of light, ℏ is Planck's constant, and mp is the Planck mass, which is related to the Newtonian gravitational constant by the equation m2p=ℏc/G. In a natural system of units, such questions as: ``How does the anthropic nature of the physical universe arise? Is it unique, or does an infinite set of universes exist?'' and ``Are the fundamentals of the physical universe knowable and what is the strategy for knowing them?'' become particularly urgent.
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