The Phenomenon: Under the Hidden Sky

What is the phenomenon? What does the evidence actually show? What are the honest theories? And how far back does the record really go?
The Phenomenon: Under the Hidden Sky is a map of the UAP landscape: what is in the record, which explanations are on the table, and how to think about all of it clearly. No prior knowledge required.

For eighty years, pilots, radar operators, generals, and scientists have been reporting something in the sky that refuses to fit neatly into familiar categories. ...