The Constancy of the Constants of Nature: Updates

Abstract

The current observational and experimental bounds on the time variation of the constants of nature (the fine structure constant $\alpha$, the gravitational constant $G$ and the proton-electron mass ratio $\mu =m_p/m_e$) are reviewed.

Comments: 27 pages, 2 figures, to be published in Prog.Theor.Phys, ref. added