08:55 GMT30 July 2021
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    • In this picture, a UFO is seen above the Swiss Alps.
    • A UFO near Stuttgart Airport in Germany.
    • In 1956 in California, Michael Savage, the 15-year-old son of a prominent San Bernardino physician and surgeon, was taking pictures with his new camera, when he saw motion out of the corner of his eye a strange object in the sky.
    • In this file video grab image, obtained on 26 April 2020, you can see  part of an unclassified video taken by Navy pilots showing a UFO.
    • A video-recorder grab taken by Taiwan resident Lee Chun-hung in northern Taiwan on 12 December 1999 shows a ball of fire trailing across the sky.
    • A mysterious cloud above Cyprus.
    • This is one of three photos of a supposed UFO taken by Rex Heflin, on 3 August 1965, near Santa Ana, Calif. Heflin served as an Orange County highway department investigator.
    • The picture, taken on 17 June 2020, shows a UFO above Aoba Ward in Sendai, Japan.
    • This photograph, reproduced from the quarterly UFO periodical Flying Saucers International in Los Angeles, shows silvery white flying objects photographed by Erich Kaiser while descending from Reichenstein mountain in Austria on 3 August 1954.
    • A fake picture of an alleged UFO above Meersburg, Germany.
    • A UFO sighted by a New Mexico State University student, West of Picacho Peak, Las Cruces, New Mexico, on 12 March 1967.
    • The Salem boys reported seeing an unidentified object over North Salem, Oregon.
    • One of the most famous fake photos of an alleged UFO over New Jersey, US.
    • A flying triangle claimed to have been photographed on 15 June, during the so-called Belgian UFO wave in 1990, over Wallonia, Belgium.
    • A lenticular cloud near Sant Llorenç del Munt, Catalonia. The phenomenon is frequently perceived as an UFO.
    © Sputnik / S. Dergunov
    In this picture, a UFO is seen above the Swiss Alps.

    The term “UFO,” which stands for “unidentified flying object,” was first coined in 1953 by the United States Air Force as a bucket term for unexplained sightings and phenomena.

    On 2 July each year, people all across the globe mark World UFO Day. The date was chosen to commemorate one of the most memorable events in Ufology – the 1947 Roswell incident – as many people continue to believe that an alien ship crashed on our planet. However, it turned out to be a nuclear test surveillance balloon.

    Meanwhile, the US government issued a report on UFOs last week, saying defence and intelligence analysts still lack sufficient data to determine the nature of several UFOs observed by American military pilots, including whether they are advanced earthly technologies, atmospherics, or of extraterrestrial origin. The report says numerous sightings remain unexplained. 

    Thousands of people claim to have witnessed UFOs – there are also scores of photos and videos showing strange objects, but none have been confirmed as anything extraterrestrial. 

    Check out Sputnik's gallery to find out whether the truth is out there. 

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