  We discuss the possibilities of experimental search for new physics predicted
by the Gauss-Bonnet and the Randall-Sundrum theories of gravity. The effective
four-dimensional spherically-symmetrical solutions of these theories are
analyzed. We consider these solutions in the weak-field limit and in the
process of the primordial black holes evaporation. We show that the predictions
of discussed models are the same as of General Relativity. So, current
experiments are not applicable for such search therefore different methods of
observation and higher accuracy are required.
