Varying coupling constants and their interdependence

Since Dirac predicted in 1937 the possible variation of gravitational constant and other coupling constants from his large number hypothesis, efforts continue to determine such without success. Such focus on one while assuming all others pegged their currently measured values. We show that variations speed light [Formula: see text], Planck Boltzmann text] are interrelated: text]. Thus, constraining any leads inadvertently others. It may not be a concurrently considering discuss several astrophysical observations have been explained recently with concomitant two or more constants. also analyze reported unexplained 35 text]g decrease 1 Kg Pt-Ir working standards over 22 years measurements they can accounted for by allowing vary as predicted, provided mass confirmed Kibble balance used determining weighing test-masses extreme precision.