Cosmological dinosaurs
  The hypothesis of existence of primordial black holes with large masses (\geq
10^6 M\odot), formed at the earliest stages of the Universe evolution, is
considered in the paper. The possibility does not contradict some theories, see
e.g. Barkana & Loeb (2001), and may match new observational data. In
particular, this scenario of evolution could describe some peculiarities in
distant galaxies and quasars. Calculations of evolution of central body mass in
protogalaxies for different initial conditions are presented. It is shown that
the sufficient rate of BH mass growth is not achieved in the standard scheme
without complex additional assumptions. Moreover, the appearance of a
primordial black hole in the epoch of primordial nucleosynthesis could
significantly change the chemical composition around it. This can lead to
different exotic stars with low mass and nonstandart metals enrichment. The
proposed scheme is not considered as universal. On the other hand, if only tiny
part of existed objects have the considered nature, it gives a unique
possibility to study extremal stages of matter and fields evolution in our
Universe.
