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For example, during the Barney and Betty Hill incident, the first recorded claim of an alien abduction, the couple reported that they were abducted and experimented on by aliens with oversized heads, big eyes, pale grey skin, and small noses, a description that eventually became the grey alien archetype once used in works of fiction.
An extraterrestrial or alien is a lifeform that did not originate on Earth. The word extraterrestrial means "outside Earth". Extraterrestrials are a common theme in modern science-fiction , and also appeared in much earlier works such as the second-century parody True History [ 1 ] by Lucian of Samosata .
The atmosphere of Pandora does have enough oxygen for humans (21–22 %), but too much carbon dioxide (16–18 %). The Na'vi have special organs (similar to kidneys) called wichow that take advantage of this atmosphere to extract greater amounts of oxygen for their bloodstream. These organs use carbon dioxide and water in their bodies and ...
Alien Nation: Film 1988 1991 Set in a world where aliens have landed in 1988 and are being integrated into society. Alien Nation: TV series 1989 1995 Based on the film of the same name. Aliens arrive in 1990. See also Alien Nation: Millennium: Alien Soldier: Video game 1995 2015 In 2015, "A-Humans" live on "A-Earth" and create superintelligent ...
All Tomorrows ends with a picture of the book's in-universe author, an alien researcher, holding a billion-year-old human skull and writing that all posthuman species disappeared a billion years in the future, for unknown reasons. The author goes on to state that mankind's story was always about the lives of humans themselves, not major wars ...
The extraterrestrial hypothesis is the idea that some UFOs are vehicles containing or sent by extraterrestrial beings (usually called aliens in this context). [13] As an explanation for UFOs, ETI is sometimes contrasted with EDI (extradimensional intelligence), for example by J. Allen Hynek. [24]
This idea led British writer H. G. Wells to write The War of the Worlds in 1897, telling of an invasion by aliens from Mars who were fleeing the planet's desiccation. [ 23 ] The 1907 book Is Mars Habitable? by British naturalist Alfred Russel Wallace was a reply to, and refutation of, Lowell's Mars and Its Canals .
Works related to space travel have popularized such concepts as time dilation, space stations, and space colonization. [1]: 69–80 [5]: 743 While generally associated with science fiction, space travel has also occasionally featured in fantasy, sometimes involving magic or supernatural entities such as angels. [a] [5]: 742–743