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The vast universe is boundless. Is it true that we humans are the only intelligent creatures? Countries all over the world vigorously develop aerospace science and technology and actively explore the mysteries of the universe in order to solve this mystery as soon as possible. Although we still haven’t found aliens or alien intelligent creatures so far, it doesn’t mean we haven’t found them, because our scientific and technological level is not advanced enough and the observation means are still primitive. Maybe there are alien creatures and civilizations far beyond…