Hansjürgen Köhler founded CENAP (Central Research Network of Extraordinary Sky Phenomena) in Mannheim (Germany) in 1973, has long been a co-editor of its journal "CENAP-Report" and is coordinating the German UFO Hotline, collecting more than 10,000 witness reports up to now.
1 article by this author
07/03/2024 Reading 2 min
