The Janus Cosmological Model predicted a law of expansion with variable acceleration as early as 2014.

It is worth recalling that the exact solution of the Janus Cosmological Model's coupled field equations has, since 2014, yielded an expansion law consistent with the mostrecent DESI observations, that is, with a greater acceleration in the past. We retain the model's major achievements, which ensure the very early formation of a large-scale, incomplete structure, as well as that of first-generation galaxies and stars. The model interprets the spiral structure as a perennial mechanism for the exchange of momentum between a non-collisional system and a negative-mass environment. The negative lensing effect accounts for all observations of light ray deflection. Thus, negative masses fulfill all the functions previously attributed to the dark matter-dark energy system. ____________________________________________