Until now, many strange things that people call UFO (Unidentified Flying Object) have appeared in the sky.
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Recently, residents of California, Nevada, and Arizona in the United States witnessed a strange trail of bluish light, shaped like a parachute about to deploy, appearing in the dark night sky.
On the morning of February 25, 1942, several strange lights appeared in the sky over Los Angeles.
The San Diego sky has witnessed the constant appearance of lights of various colors.
A giant spiral appeared in the sky over Norway in 2009, causing many people concern and anxiety.
