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Subscribe to our YouTube channel for free here: https://sc.mp/subscribe-youtube Glowing blue patches, also known as “blue tears”, have been lighting up waters off Pingtan Island in eastern China’s Fujian province. Drawing crowds of tourists, the natural phenomenon is actually caused by a tiny bioluminescent organism called dinoflagellates, a type of algae that glows when disturbed. Despite its beauty, the glistening sea is actually a sign…