NASA: Τα τέσσερα πράγματα που μάθαμε για τα UFO

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This NASA photo released on April 27, 2021 shows a black-and-white image taken by the navigation camera aboard NASA's Ingenuity helicopter during its third flight on Mars, on April 25, 2021. - The Ingenuity Mars Helicopter was built by JPL, which also manages this technology demonstration project for NASA Headquarters. It is supported by NASA's Science Mission Directorate, Aeronautics Research Mission Directorate, and Space Technology Mission Directorate. (Photo by Handout / NASA/JPL-Caltech / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / NASA/JPL-Caltech/HANDOUT" - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS AFP