Ufology (juːˈfɒlədʒi ) is the investigation of unidentified flying objects (UFOs) by people who believe that they may be of extraordinary origins (most frequently of extraterrestrial alien visitors). While there are instances of government, private, and fringe science investigations of UFOs, ufology is generally regarded by skeptics and science educators as a canonical example of pseudoscience.
Ufology is a neologism derived from UFO (a term apparently coined by Edward J. Ruppelt), and is derived from appending the acronym UFO with the suffix -logy (from the Ancient Greek -λογία (-logia)). Early uses of ufology include an article in Fantastic Universe (1957) and a 1958 presentation for the UFO "research organization" The Planetary Center.
The roots of ufology include the "mystery airships" of the late 1890s, the "foo fighters" reported by Allied airmen during World War II, the "ghost fliers" of Europe and North America during the 1930s, the "ghost rockets" of Scandinavia (mostly Sweden) in 1946, and the Kenneth Arnold "flying saucer" sighting of 1947. Media attention to the Arnold sighting helped publicize the concept of flying saucers.
Publicity of UFOs increased after World War II, coinciding with the escalation of the Cold War and strategic concerns related to the development and detection (e.g., the Ground Observer Corps) of advanced Soviet aircraft. Official, government-sponsored activities in the United States related to ufology ended in the late 1960s following the Condon Committee report and the termination of Project Blue Book. Government-sponsored, UFO-related activities in other countries, including the United Kingdom, Canada, Denmark, Italy, and Sweden also ended. An exception to this trend is France, which maintains the GEIPAN program, formerly known as GEPAN (1977–1988) and SEPRA (1988–2004), operated by the French Space Agency CNES.
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Ancient astronauts (or ancient aliens) refer to a pseudoscientific set of beliefs which holds that intelligent extraterrestrial beings visited Earth and made contact with humans in antiquity and prehistoric times. Proponents suggest that this contact influenced the development of modern cultures, technologies, religions, and human biology. A common position is that deities from most, if not all, religions are extraterrestrial in origin, and that advanced technologies brought to Earth by ancient astronauts were interpreted as evidence of divine status by early humans.
An unidentified flying object (UFO), or unidentified aerial (or anomalous) phenomenon (UAP), is any perceived aerial phenomenon that cannot be immediately identified or explained. Upon investigation, most UFOs are identified as known objects or atmospheric phenomena, while a small number remain unexplained. While unusual sightings have been reported in the sky throughout history, UFOs became culturally prominent after World War II, escalating during the Space Age.
The extraterrestrial hypothesis (ETH) proposes that some unidentified flying objects (UFOs) are best explained as being physical spacecraft occupied by extraterrestrial intelligence or non-human aliens, or non-occupied alien probes from other planets visiting Earth. Origins of the term extraterrestrial hypothesis are unknown, but use in printed material on UFOs seems to date to at least the latter half of the 1960s. French ufologist Jacques Vallée used it in his 1966 book Challenge to science: the UFO enigma.
An exciton-polariton is a quasi-particle that emerges from the strong coupling between an exciton and a photon. Recently, the studies of the exciton-polariton have been receiving a great deal of attention in terms of both fundamental physics and potential ...