K. E. Tsiolkovsky loved and knew how to dream His thoughts about the conquest of the universe, about interplanetary travel, he often dressed in the form of science fiction stories, stories, articles. Often, starting to write sci-fi works, Tsiolkovsky directly moved to the development of complex scientific problems. Konstantin Eduardovich has the words: "First inevitably there are thought, fantasy, fairy tale. They are followed by a scientific calculation .. And in the end, the performance crowns the thought.". The scientist was deeply concerned with the biology of the future, that is, the biology of the time when humanity will almost begin to conquer near-solar, and then interstellar space. Tsiolkovsky devoted several works to this problem .. One of them “Living beings in space” we publish with some abbreviations below . This little-known to readers article and a number of other equally interesting materials will soon be published as a separate book in the publishing house Academy of Sciences of the USSR. Naturally, time and rapidly developing science have amended the work written more than 30 years ago. Differently, than before, scientists explain the causes and ways of the spread of life in space more definite was the opinion of researchers on the questions: will the Sun cool down, are all substances suitable for the creation of living organisms? Tsiolkovsky's statement seems rather controversial and that the atmosphere is not at all necessary for the existence of organic life. But all this in no way can reduce the great importance of the ideas of Konstantin Eduardovich Tsiolkovsky, developed in this article. Can living organisms live on other planets of our and other solar systems? What are they? In no way - by virtue of others, On the ground , physical conditions - they must be different from humans and animals of our planet? How will the evolution of man, Stepping into space and adapting to new physical conditions?Tsiolkovsky gives answers to these interesting questions. Current Issues .