Darwin from Descent of Man to Emotions under Domestication" which went on sale on 30 January 1868. He now published his ideas on human evolution and on how beautiful but apparently impractical features could have evolved in "The Descent of Man, and Selection in Relation to Sex". After revising "The Origin of Species" as the definitive 6th edition, his major works on species culminated in "The Expression of the Emotions in Man and Animals". This period was followed by extensive work on insectivorous plants and research into worms. Despite Darwin's concerns that his children were weakened as his wife Emma Darwin was his cousin or had inherited
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