"In 1956 Shapiro had been very actively investigating the so-called $\tau-\theta$ problem, which had been puzzling physicists for a long time. Shapiro came to the conclusion that the only possible explanation could be the parity non-conservation in this decay of mesons... Landau, when Shapiro presented him the paper, laughed at such an idea -- without Landau's holy consent Shapiro's paper could not be published. It remained on his desk, where I saw it many months before Lee and Yang submitted their paper for publication. So, because of Landau, Soviet physics lost one Nobel prize. A similar case is reported by Landau's closest collaborator, A.A. Abrikosov. Landau's negative attitude to Abrikosov's theory had delayed the discovery of superconductivity II for about four years."