September 4th 1971 - During an official government aerial mapping expedition, an unexplained anomaly appeared on film between frames 299 and 301. The image, cataloged within Costa Rica’s national archive, has endured decades of scrutiny. Preserved with a clear chain of custody, the photograph has been examined by some of the most respected academic and scientific voices — and remains unexplained. submitted by /u/UFO_enthused [link] [comments]