Unidentified Aerial Phenomena: A Historical Overview of Investigations and Explanations

To the point

Unidentified aerial phenomena are sky objects observers cannot identify, a topic that surged in public interest after Kenneth Arnold’s 1947 Mount Rainier sighting and led to investigations and scientific reviews that largely found natural or human explanations and no evidence of extraterrestrials, with J. Allen Hynek urging cautious openness, covert programs like the DoD’s AATIP keeping interest alive, and countries varying in how they document cases.