🇺🇸 USAF — Project Blue Book
In July 1947, in Chengtu, China, an object fell from the sky. Described as silver and rectangular, it measured about 10 inches long, five inches wide, and one inch thick. It had a piece of white paper on the bottom and contained four small batteries, two radio transmitter tubes, and English inscriptions. Although no photos were taken, the report concluded it could be a radiosonde, a common meteorological device at the time. The description exactly matched the U.S. Air Force's radiosondes, suggesting the object was not supernatural but a misunderstood human-made device.
This case, though brief, reflects how unidentified aerial phenomena can generate curiosity and mystery, especially when they contain unfamiliar technological components. The lack of photographic evidence and the ambiguity of the civilian source complicated a definitive evaluation, but the match with a radiosonde helps contextualize the event. Despite not being in official files, this record remains interesting for researchers of unidentified aerial phenomena.