  :see margaret cavendish (1661â1717) for the later duchess of newcastle of this name.  thumb|mary lucas, older sister of margaret cavendish thumb|segment from frontispiece for several of her books in the 1650s and 1660s. thumb|the blazing world thumb|portrait margaret cavendish, duchess of newcastle-upon-tyne (1623 â 15 december 1673) was an english aristocrat, a prolific writer, and a scientist. born margaret lucas, she was the youngest sister of prominent royalists sir john lucas and sir charles lucas. she became an attendant of queen henrietta maria and travelled with her into exile in france, living for a time at the court of the young king louis xiv. she became the second wife of william cavendish, 1st duke of newcastle-upon-tyne in 1645, when he was a marquess. cavendish was a poet, philosopher, writer of prose romances, essayist, and playwright who published under her own name at a time when most women writers published anonymously. her writing addressed a number of topics, including gender, power, manners, scientific method, and philosophy. her utopian romance, the blazing world, is one of the earliest examples of science fiction.khanna, lee cullen. "the subject of utopia: margaret cavendish and her blazing-world." utopian and science fiction by women: world of difference. syracuse: syracuse up, 1994. 15â34. she is singular in having published extensively in natural philosophy and early modern science. she published over a dozen original works; inclusion of her revised works brings her total number of publications to twenty one. cavendish has been championed and criticised as a unique and groundbreaking woman writer. she rejected the aristotelianism and mechanical philosophy of the seventeenth century, preferring a vitalist model instead. she criticised and engaged with the members of the royal society of london and the philosophers thomas hobbes, renÃ© descartes, and robert boyle. she has been claimed as an advocate for animals and as an early opponent of animal testing.shevelow, kathryn. for the love of 
1623_births 1673_deaths 17th-century_novelists 17th-century_philosophers 17th-century_scientists 17th-century_women_scientists 17th-century_women_writers Animal_rights_advocates Cavendish_family English_dramatists_and_playwrights English_essayists English_philosophers English_poets English_women_dramatists_and_playwrights English_women_philosophers English_women_poets English_women_writers Rhetoricians Science_fiction_writers Women_essayists Women_of_the_Stuart_period Women_science_fiction_and_fantasy_writers