1. Pre-Modern Era: Reports interpreted through cultural lenses, attributed to gods, spirits, or mystical phenomena
2. Early 20th Century: Sightings of unusual aerial phenomena, "foo fighters" reported, limited ability to track or document
3. Post-World War II: Increased scrutiny by military and government agencies, scientific investigation
4. Space Age and Cold War: Public fascination with extraterrestrial life and UFOs, advances in space exploration
5. Digital Age: Democratization of reporting, challenges with digital manipulation
6. Data Analysis and Machine Learning: Identifying patterns and trends in UFO sighting data