  In this paper we present a new simple method of construction of infinite
number of solutions of Freidmann equations from the already known ones, which
allows for a startling conclusion of practical impossibility of correct
predictions on the universe's future dynamics which are based solely on
astronomical observations on the value of a scale factor. In addition, we
present particular examples of newly constructed solutions, such as the ones,
describing the smooth dynamical (de)-phantomization, and the models lacking the
events horizons (both in classical and brane world cases). The generalization
of the method to the simplest anisotropic universes are presented as well.
