This is a list of notable reported sightings of unidentified flying objects (UFOs) or unidentified anomalous phenomena (UAP), and related claims of close encounters or abductions. UAP are generally considered to include any perceived airborne, submerged or transmedium phenomenon that cannot be immediately identified or explained.[2][3][4] Upon investigation, most UFOs are identified as known objects or atmospheric phenomena, while a small number remain unexplained.[5][6][7]
NUFORC has collected over 100,000 UFO reports spanning decades. The most common description was of "lights" in the sky, and many UFOs were of an "unknown" or "unspecified" shape. Others included: cubes (16), cones (600), crosses (491), teardrops (1221), and stars (138).
Arranz, Adolfo (24 December 2017). "Are we alone?". South China Morning Post. Infographics by Pablo Robles. Archived from the original on 22 July 2023. Retrieved 22 July 2023.