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In such industrialized and fast paced time as XXI century humanity has variable resources, technology, and an extensive knowledge, which we apply to events and situations in desire to explore the world we live in. As many professors mention as an example in their lectures, we explained the phenomena of the rainbow, we built settle lights, and took first steps on the Moon. However, the human kind never stopped searching for more. Still, we keep looking for mysteries beyond our understanding. Thus, people continue to believe in UFO. Why does this believe remain popular? Do people feel lonely, or it's the next step in the evolution of the human kind - to find a civilization of higher organization? According to scientific observation, individuals tend to mistake the objects they have never seen before for the UFO just because the experience is unusual and unforeseen. However, when scientific support for the mystery they witnessed is given and explanations are found (the changing colors object we see in the night sky so often in fact are the settle lights that reflect sun beams), the person is slightly disappointed because the unknown is solved. Strangely, it boosts the scavenger hunt. People start patiently watching the sky until finally they see Venus, glowing near the horizon, migrating birds with light colored feathers that reflect the neon of streetlights... If witnesses are not familiar with the scientific aspect, the venues are being justified as UFOs. Scientists explain attractiveness of the UFO theory as a subconscious response to the timeless search of the reason of unusual happenings' occurrence. They found that human as a curious explorer has amazing ability to find and reinforce the patterns that are familiar and suitable, and arise in the daily life. At the same time, this unique ability is a weakness that leads us to self-deception. As a result, we see what we want to believe in and fascinate our self with what we had persuaded our self. In the article Cosmic Loneliness, Donald Goldsmith and Tobias Owen indicate another debate why do people believe extraterrestrials existence. Authors provide speculations between science, creationism and factual analysis of reasons that trigger human mind to consider possibility of the UFOs, life on other planets, and stellar traveling. They encourage human realize the capital knowledge we already possess to relate it to the phenomenon we observe "us" and the planet we leave on. Why don't we start searching for life in the Universe assessing evolution and progress on Earth? Then, Goldsmith and Owen state,humanity will be able to "join the galactic network and end forever our cosmic loneliness" (, Cosmic Loneliness, p.188, Insights). Evaluating materials of the articles and lectures, I tend to think that strongest ground for beliefs in extraterrestrials and UFOs is the 'need'. Like our ancestors, modern people 'need' myths they can't scientifically explain. That is why we happen to deceive our self, intentionally changing the circumstance of the situation for it not to fit logical explanation. Curiosity, dispute and reluctance of ultimate axiom of how to identify whether the unusual we witnessed is unawareness or true phenomena that what feeds our conviction in the existence of advanced civilizations.
Read what he said, it explains a lot.