Extraterrestrial civilizations

“To consider the earth the only inhabited world in the infinite space would be the same glaring absurdity as to say that only one wheat colossus could grow on a huge sown field” (Metrodor, 150-70 BC) This reality will seem stunning to someone, for others the information will seem controversial, however, all this is a reality of being. Unlike some ufological researchers, we do not occupy hesitating and two -faced positions and declare firmly that extraterrestrial civilizations exist in effect. In this work, materials that reveal the nature of the inhabitants of the cosmos were selected, and simplified descriptions of extraterrestrial civilizations that visited the Earth and attended it are given. The purpose of our publication is to introduce progressively thinking youth to cosmic realities, to clarify the place of mankind in the cosmic hierarchy of intelligent creatures