Juan Posadas, (1912–1981), Trotskyist theorist who blended together Trotskyism and Ufology. Posadas' version of Trotskyism is regarded as its own strain, and called Posadism.[1]
Ross Coulthart, journalist and lawyer, interviewed the UFO whistleblower David Grusch on the US governmental cover-ups of the recovery programs of crashed UFOs.[3]
J. Salatun, (1927–2012), pioneer of UFO research in Indonesia.[10]
Italy
Monsignor Corrado Balducci, (1923–2008), Roman Catholic theologian of the Vatican Curia long time exorcist for the Archdiocese of Rome.[11][verification needed]
Dan Apostol, (1957–2013), writer and researcher specialized in several domains.[13]
Doru Davidovici, (1945–1989), fighter pilot and writer. Author of the best-seller Lumi Galactice – colegii mei din neștiut ("Galactic worlds – my colleagues from the unknown")[14][15]
Ion Hobana (1931–2011), science fiction writer, literary critic and ufologist.[16][17]
Spain
Iker Jiménez Elizari (b. 1973), journalist born in the Basque city of Vitoria. He's licensed in Sciences of the Information by the Complutensian University of Madrid and the European University of Madrid. His wife, Carmen Porter, is also a journalist and investigator on paranormal activity; both work together in the show Cuarto Milenio, in the TV network Cuatro, and its radio version Milenio 3 in Cadena SER, about paranormal activity, Ufology and other mysteries.[18][19][verification needed]
Erich von Däniken, (b. 1935), controversial Swiss author best known for his books which examine possible evidence for extraterrestrial influences on early human culture.[21]
Giorgio A. Tsoukalos, (b. 1978), probably best known for his work on Ancient Aliens and alien memes.[22]
United Kingdom
Brinsley Le Poer Trench, (1911–1995), ufologist and a believer in flying saucers, and in particular, the Hollow Earth theory.[23][unreliable source?]
Timothy Good (b. 1942), British researcher and author.
Graham Hancock (b. 1950), British writer and journalist. He is known for his pseudoscientific theories involving ancient civilisations, Earth changes, stone monuments or megaliths, altered states of consciousness, ancient myths, and astronomical or astrological data from the past.
George King, (1919–1997) regarded himself as "Primary Terrestrial Mental Channel" for great and evolved extraterrestrial Intelligences.[24][verification needed]
Nick Pope, (b. 1965), Former head of the UFO desk, Ministry of Defence; author of Operation Thunder Child.[26]
Jenny Randles (b. 1951), British author and former director of investigations with the British UFO Research Association (BUFORA).[27][unreliable source?]
Colin Wilson (1931–2013), English philosopher and author of Alien Dawn (1999).
United States
George Adamski (April 17, 1891 – April 23, 1965), controversial UFO contactee and known hoaxer of the 1950s, wrote several bestselling books about his encounters with friendly "space brothers" from other planets.[31]
Orfeo Angelucci (aka Orville Angelucci) (June 25, 1912 – July 24, 1993), one of the most unusual of the mid-1950s UFO contactees.[32][verification needed]
Art Bell (birth name: Arthur William Bell, III) (June 17, 1945 – April 13, 2018), U.S. radio broadcaster and author, known primarily as the founder and longtime host of the paranormal-themed radio program Coast to Coast AM.[33]
William J. Birnes, American writer, editor, book publisher and literary rights agent. He is best known as an active publisher of UFO literature (UFO Magazine) and is a New York Times bestselling author.
Jerome Clark (b. 1946), UFO historian, author of the UFO Encyclopedia[34]
Robert Dean (March 2, 1929 – October 11, 2018), ufologist, reportedly read a document called An Assessment (1964), a NATO report on UFOs prompted by an incident on February 2, 1961 during which 50 UFOs allegedly appeared over Europe.[36]
Tom DeLonge (b. 1975), current singer and guitarist of blink-182 and founder of To the Stars Academy of Arts and Sciences[37]
Glenn Dennis (March 24, 1925 – April 28, 2015), founder of the International UFO Museum and Research Center in Roswell, New Mexico, which opened in September 1991. Dennis is a self-professed witness to the Roswell incident (1947).[38]
Danielle Egnew (b. February 28, 1969), American Psychic / Medium and Paranormal Radio, TV and Film host. Contactee who regularly reports on first-hand communication with extraterrestrial species along with detailed physics / design of extraterrestrial propulsion systems.[39][40][verification needed]
Raymond E. Fowler (b. 1934), long-time UFO investigator, details one of the best multiple witness alien abduction cases on record, author of The Andreasson Affair and The Allagash Abductions.[41][42]
Daniel Fry (July 19, 1908 – December 20, 1992), American contactee who claimed he had multiple contacts with an alien and took a ride in a remotely piloted alien spacecraft on July 4, 1949.[43][verification needed]
Steven M. Greer (b. 1955), American physician known as a proponent of openness in government, media and corporations when it comes to advanced technologies that he and others believe to have been shelved and hidden from public awareness for reasons of profit and influence.[44][verification needed][45]
Richard H. Hall (December 25, 1930 – July 17, 2009), former assistant Director of NICAP in the 1960s, former director of the Fund for UFO Research in the 1980s.[46]
Charles I. Halt (b. 1939), retired USAF Colonel who was a key figure in the Rendlesham UFO incident in 1980.[47]
Robert L. Hastings (b. 1950), author and photographer, investigator of UFOs appearances around nuclear facilities.[48]
Allan Hendry (b. 1950), astronomer, full-time UFO investigator for the Center for UFO Studies in the late 1970s and early 1980s.[49][verification needed]
J. Allen Hynek (May 1, 1910 – April 27, 1986), astronomer, consultant to Project Blue Book (USAF). Founded CUFOS (Center for UFO Studies).[51][verification needed]
Donald Keyhoe (June 20, 1897 – November 29, 1988), aviator and Marine Corps officer, was the leader of NICAP, the largest civilian UFO research group in the U.S., in the 1950s and 1960s.[56][verification needed]
Philip J. Klass (November 8, 1919 – August 9, 2005), senior editor of Aviation Week and Space Technology, leading UFO skeptic/debunker from mid-1960s until his death in 2005.[citation needed]
Kevin H. Knuth, associate professor of physics at University at Albany, editor-in-chief of Entropy scientific journal, author of "Estimating Flight Characteristics of Anomalous Unidentified Aerial Vehicles" - scientific paper based on US Navy personnel UFO observations[58][59][60][61][62][63]
Bob Lazar (b. 1959), owner of a mail-order scientific supply company who claims to have worked from 1988 until 1989 at an area called S-4 (Sector Four).[64]
Avi Loeb (b. 1962), Israeli-American theoretical physicist who works on astrophysics and cosmology, Professor of Science at Harvard University. In 2018, he attracted media attention for suggesting that alien space craft may be in our solar system, using the anomalous behavior of ʻOumuamua as an example.[65] He also claims that UFO needs serious scientific study, as part of SETI research[66]
Jim Marrs (December 5, 1943 – August 2, 2017), conspiracy theorist, news reporter, college professor, and author of books and articles on a wide range of assorted conspiracy theories.[70][verification needed]
Riley Martin (May 9, 1946 – December 2015), self-described alien contactee, author, and radio host.[71]
Donald Howard Menzel (1901–1976), professor of astronomy at Harvard University, leading UFO skeptic of the 1950s and 1960s.[72]
James W. Moseley (1931–2012), editor of Saucer Smear, long-time observer, author and commentator of the UFO phenomena.[73]
Edward J. Ruppelt (July 17, 1923 – September 15, 1960), Air Force captain who supervised Project Blue Book, the Air Force's official study of the UFO phenomenon in the 1950s and 1960s.[78][verification needed]
Chan Thomas, author on ancient cataclysms who researched purported UFO technology for McDonnell Douglas in the 1960s, and whose ideas went on to influence conspiracy theorists in the 2020s.
↑Clark, Jerome (1998). The UFO Encyclopedia: The Phenomenon from the Beginning, Volume 2, A-K Detroit: Omnigraphics. Detroit, MI: Omnigraphics. ISBN0-7808-0097-4.
↑Greenwell, J. Richard, "Menzel, Donald H[oward]" pp. 229–230 in The Encyclopedia of UFOs, Ronald Story, editor; Garden City: Doubleday & Company, Inc, 1980, ISBN0-385-13677-3
↑Moseley, James W.; Pflock, Karl T. (2002). Shockingly Close to the Truth!: Confessions of a Grave-Robbing Ufologist. Prometheus Books. ISBN1-57392-991-3.
↑Diana Palmer Hoyt, "UFOCRITIQUE: UFOs, Social Intelligence and the Condon Committee"; Master's Thesis, Virginia Polytechnic Institute, 2000 read it online
↑Rutledge, Harley D. Project Identification: The first Scientific Study of UFO Phenomena. Prentice-Hall 1981 ISBN0-13-730713-6