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Laughter in animals other than humans describes animal behavior which resembles human laughter. Several non-human species demonstrate vocalizations that sound similar to human laughter. A significant proportion of these species are mammals, which suggests that the neurological functions occurred early in the process of mammalian evolution. [ 1 ]
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Laughter is a pleasant physical reaction and emotion consisting usually of rhythmical, usually audible contractions of the diaphragm and other parts of the respiratory system. It is a response to certain external or internal stimuli. Laughter can rise from such activities as being tickled, [1] or from humorous stories, imagery, videos or ...
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Included are natural sounds (including some made by animals), musical selections from different cultures and eras, spoken greetings in 59 languages, [1] [2] human sounds like footsteps and laughter, [3] and printed messages from President Jimmy Carter and U.N. Secretary-General Kurt Waldheim.
The transcript of one of Abraham Lincoln's speeches in 1862 recorded the audience's reaction as: "(applause and laughter ;)". [12] [17] There has been some debate whether the glyph in Lincoln's speech was a typo, a legitimate punctuation construct or the first emoticon. [18] Linguist Philip Seargeant argues that it was a simple typesetting ...
Relief theory suggests humor is a mechanism for pent-up emotions or tension through emotional relief. In this theory, laughter serves as a homeostatic mechanism by which psychological stress is reduced [1] [2] [6] Humor may thus facilitate ease of the tension caused by one's fears, for example.