Caelum Incognitum — The interactive encyclopedia of ufology
Close encounter of the fourth kind (CE4)
Classifications & scales
Category added after Hynek by other researchers to designate abduction cases: the witness says he or she was taken aboard or examined. It rests on accounts, often gathered under hypnosis, and remains highly controversial, since memory is prone to suggestion.
In the major cases
- Betty & Barney Hill Abduction (1961)
- Travis Walton Abduction (1975)
- The Dionisio Llanca Abduction (1973)
- The Carl Higdon Abduction (1974)