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{{Short description|U.S. Air Force investigation of UFOs (1949–51)}} ...ce|U.S. Air Force]] (USAF) to investigate [[unidentified flying object]]s (UFOs). Grudge succeeded [[Project Sign]] in February, 1949, and was then followe ...

{{short description|U.S. government study of UFOs}} ...tates Air Force]] (USAF) and active for most of 1948. It was the precursor to [[Project Grudge]]. ...

{{Infobox government agency | parent_agency = [[United States Deputy Secretary of Defense]] ...

...<ref>Plurality of Worlds: The Extraterrestrial life Debate from Democritus to Kant, by Steven Dick, Cambridge University Press 1984</ref> The modern form ..."species" and "intelligence", as those may prove to be ambiguous and open to interpretation, or simply inapplicable in its local context.<ref>{{Cite web ...

...ete status reports (1 to 12 and 14), including Project Grudge data, and up to May 1955]] ..., namely, to determine if UFOs were a threat to [[national security]], and to [[Scientific method|scientifically analyze]] UFO-related data. ...

| jr/sr = United States Senator | office2 = Chair of the [[United States Senate Committee on Armed Services|Senate Armed Services Committee]] ...

...debris were recovered by [[Roswell Army Air Field]] personnel, the United States Army announced their possession of a "flying disc". This announcement made ...dictory [[UFO conspiracy theories]], which over time expanded the incident to include governments concealing evidence of extraterrestrial beings, [[grey ...

...detected. Such life might range from simple forms such as [[prokaryote]]s to [[Extraterrestrial intelligence|intelligent beings]], possibly bringing for ...t=Crowe|first=Michael J.|title=The extraterrestrial life debate, antiquity to 1915: a source book/edited by Michael J. Crowe|pages=14–16|publisher=Univer ...