UFO means unidentified flying objects , this name referred to an object that fly in the sky whose identity cannot be determined. civilian and military research shows sight of UFOS since World War II , but the news of UFO in the sky gain popularity in 1947 when a pilot seen a UFO during his flight. the pilot describe that it looked like a flying saucer or like a disc and after that new many people claim to have seen UFOs in similar in shape. till now ,many theories have been afloat on the existence and non existence of UFOs, but still the physical proof of its existences has not been verified.
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