For now, the strongest scientific argument that supports the existence of extraterrestrial intelligent beings is only a statistic: the Universe is so big that there has to be other life forms that possess intelligence and abilities to shape their environment. Our galaxy, the Milky Way, comprises over 100 billion stars, and the known Universe comprises over 100 billion galaxies. Hypothetically, if one in a million planets capable to support life would be indeed populated with life, and if one in a million planets that would be populated with life would also shelter intelligent life, then there would be millions of intelligent species in the Universe. So, following this reasoning, it is unlikely that Earth is the only planet that supports life and man is the only intelligent being in the Universe. The statistics, however, regardless of their kind, cannot serve as an indisputable proof that we are not alone, a proof that has been missing to this day. Accordingly, believing or not believing in aliens is a personal choice.
The current cultural image of aliens is chaotic and even hilarious, being formed of inexhaustible theories, countless “evidence” and lots of contradictions. On the one hand, huge funds and efforts are invested in scientific research to find microorganisms on various celestial bodies or to intercept a signal from unearthly intelligent beings. On the other hand, there is the media circus with flying saucers, aliens who violate our private property, enter houses without knocking at the door, disturb people’s sleep, sample cells, have fun raping or kidnapping humans, conspire to destroy us all, more aliens, secret experiments and human history rewritten. Since the beginning of the 20th century an industry that exploits our fascination and passion for the sensational has been developed. Compared to other paranormal topics (magic, Spiritism, fortune-telling, ghosts), aliens are at the top of the public’s preferences. Figuratively, we assist at an alien “invasion” in our everyday life: on TV, on