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Could you tell me the number for ? <a href=" http://kuluttaja.fi/flagyl-metronidazol-suspension-250-mg-emagrece.pdf ">flagyl 400 uses worksheets</a> Einstein predicted that certain physical properties, like the strength of the interaction between photons and electrons, or the ratio of the mass of electrons and protons, should never change. But competing theories say that those "fundamental constants" might actually fluctuate and such changes would slightly influence the ticking speed of atomic clocks.