Director of the Institute of Astronomy of the Russian Academy of Sciences (INASAN) Dmitry Bisikalo said that he admits the existence of many intelligent alien civilizations outside the solar system, noting that the aliens simply "do not want to get in touch."
“I admit the existence of intelligent extraterrestrial civilizations. Our civilization does exist, by analogy with it there may be others, and most likely there are many of them. Professor of astronomy and astrophysics at the University of California Santa Cruz, Dr. Frank Drake, in 1960, derived a formula that allows you to calculate the number of extraterrestrial civilizations with which we could come into contact. According to the formula, there are many of them,”Bisikalo said in an interview.
He noted that humanity has not yet found evidence of the existence of alien intelligence because "aliens do not want to get in touch." The second reason may lie in the rather short life span of civilization - its short activity, Bisikalo explained.
“For example, our civilization until the beginning of the twentieth century did not radiate anything at all. Now the Earth is replete with electronic signals in different bands, but the general trend is to reduce losses and, therefore, to decrease the signal level,”he said.
According to him, after the discovery of exoplanets, reasoning about the existence of other civilizations moved to a practical experimental plane. Bisikalo explained that one of the most urgent tasks now is to identify and search for possible biomarkers in space, that is, evidence of the existence of life. Biomarkers are oxygen, ozone, methane, but their presence on an exoplanet does not guarantee the presence of life there, he noted.
“It is important to note that many biomarkers appear in the ultraviolet region of the spectrum, which will be studied by the Spektr-UF space observatory, which we will launch into orbit in 2024. Perhaps with its help we will see something really interesting,”added Bisikalo.