NEVOD–DECOR experiment and evidences for quark–gluon plasma in cosmic rays

New method of EAS investigations by local muon density spectra and results of muon bundles detection in NEVOD–DECOR experiment are considered. The observed excess of muon bundles from very high energy cosmic rays and results of some other experiments which are evident for an additional flux of very high energy muons are analyzed. A possibility of their explanation through quark–gluon plasma blob production and its consecutive decay is discussed. The ways of experimental checks of this model are considered.