Developing fundamental constants in the six-dimensional universe

Within the framework of the six-dimensional geometrical theory of gravi-electroweak interactions, the possible variation of fundamental physical constants in developing homogeneous isotropic cosmological models is considered. In this theory the electric charges and the masses depend on time, and the cosmological shift of light spectral lines is due to two factors: the Doppler effect and the variation of fundamental constants during the time of light propagation. Because these factors strengthen each other, the age of the Universe turns out to be greater than in the standard Friedmann model.