June 25, 1947 Appearance of the term “flying saucer” in the United States, in an article in the daily East Oregonian taken over by the Associated Press, following an observation by Kenneth Arnold, during a flight with his private plane, of nine ” objects “ moving “Like discs ricocheting on water”.
July 8, 1947 In the city of Roswell, United States, strange debris is discovered on a farm. The Roswell case was born.
1951 In France, the jurist Marc Thirouin founded the Ouranos International Commission of Inquiry into Flying Saucers and Related Problems, and with the Briton Eric Biddle a review of the same name, Ouranos.
1958 Birth in France of a bimonthly journal dealing with ufology, Lights in the night (LDLN).
1977 Movie release Encounters of the Third Kind, by Steven Spielberg, and creation of the Study Group on Unidentified Aerospace Phenomena (Gepan) at the National Center for Space Studies (Cnes).
January 2021 2,780 pages of CIA UFO study documents declassified by the US government and available online. Publication of the book by astrophysicist Avi Loeb, former director of the Department of Astronomy at Harvard University, The First Sign of Alien Intelligent Life.