Abstract
The hypothesis that dark matter consists of superheavy neutral particles with the mass of the Grand Unification scale is considered. The hypothesis that dark matter is converted into visible one in active galactic nuclei is investigated. If active galactic nuclei are rotating black holes then due to Penrose process superheavy particles can decay on nonstable particles with larger mass the decay of which on quarks and leptons leads to events in cosmic rays observed by the Auger group. Similar processes of decay of superheavy particles of dark matter into visible matter occurred in the early Universe. Numerical estimates of the processes in active galactic nuclei and in the early Universe are given.
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