Historical

1460 BC – 1879

Jacques Vallee and Chris Aubeck, Wonders In The Sky – Unexplained Aerial Objects From Antiquity To Modern Times, 2009

1879 – 2025

• ScienceDirect (abstract + snippets), https://www.sciencedirect.com/science/article/abs/pii/S0376042125000235
• Cornell (free: hmtl, pdf), https://arxiv.org/abs/2502.06794
• KnuthLab (free: pdf), https://knuthlab.org/pmwiki.php/Projects/UAP