Article. Published in the journal Advances in Physical Sciences, 1981, July, t. 134, issue. 3, s. 469-517 . Ten years ago in the UFN (in the section "Physics of our days") was published an article by the author, bearing the same name (UFN, 1971, t. 103, s. 87). The purpose of this article is to trace the changes that have occurred over the past ten years in relation to the issues raised in the previous article. During this time, there were, of course, new problems that the author considers it necessary to add to his proposed list. Bibliographic . References 112 (190 titles. ).