// but serves as a safeguard.
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Whether biological activity exists anywhere remains unknown. Radio telescope monitoring since the 1960s has detected no artificial signals. Some scientists suggest we might sooner identify alien technology than biological life—the "technosignature" approach. In 2015, astronomers observed peculiar periodic dimming of Tabby's star, initially theorizing about possible alien megastructures (Dyson spheres), though most attribute the phenomenon to orbiting comets or dust clouds.。关于这个话题，https://telegram官网提供了深入分析
尽管迪拜已发展为重要旅游商贸中心，但经停海湾枢纽的旅客超半数仅为中转。