measurement
Approximately 95% of reported U.F.O. sightings investigated by Project Blue Book were attributed to common phenomena such as uncommon clouds, weather balloons, atmospheric temperature inversions, Venus, or classified military technology like the U-2 spy plane and the SR-71 Blackbird.
Authors
Sources
- How the Pentagon Started Taking U.F.O.s Seriously | The New Yorker www.newyorker.com via serper
Referenced by nodes (4)
- UFO sightings concept
- Project Blue Book concept
- Project Blue Book entity
- U-2 reconnaissance aircraft concept