Emotion in animals specialised form of Occam's razor used in ethology, in which he stated: Charles Darwin initially planned to include a chapter on emotion in "The Descent of Man" but as his ideas progressed they expanded into a book, "The Expression of the Emotions in Man and Animals". Darwin proposed that emotions are adaptive and serve a communicative and motivational function, and he stated three principles that are useful in understanding emotional expression: First, "The Principle of Serviceable Habits" takes a Lamarckian stance by suggesting that emotional expressions that are useful will be passed on to the offspring. Second, "The Principle of
The Man in the Moone as one of the first works of science fiction, there is no general agreement that it is even "proto-science-fiction". Early commentators recognised that the book is a kind of picaresque novel, and comparisons with "Don Quixote" were being made as early as 1638. In structure as well as content "The Man in the Moone" somewhat resembles the anonymous Spanish novella "Lazarillo de Tormes" (1554); both books begin with a genealogy and start out in Salamanca, featuring a man who travels from master to master seeking his fortune. But most critics agree that the picaresque mode is not sustained throughout, and