🇺🇸 USAF — Project Blue Book
In August 1959, in Marysville, Ohio, an unidentified object left a mark on a glass surface, marking a rare physical trace in UFO files. A single glass slide was documented as part of the report, though no further details on analysis or conclusions were included. Such physical evidence is uncommon in UFO records, making this case especially intriguing for researchers.
The object was observed during daylight and caused a clear deformation on the glass, suggesting significant energy. Despite the physical imprint, no direct witnesses were reported, and no detailed analysis of the material was conducted. The case remains unresolved, like so many others in government archives.