What is John Muir?
{{Infobox person | name = John Muir | image = John Muir 1912.jpg | image_size = | caption = John Muir, 1912 | birth_date = {{birth date|mf=yes|1838|04|21}} | birth_place = [[Dunbar]], [[East Lothian]], Scotland | death_date = {{death date and age|mf=yes|1914|12|24|1838|04|21}} | death_place = [[Los Angeles, California]], U.S. | death_cause = [[Pneumonia]] | occupation = Engineer, naturalist, writer, botanist, geologist, glaciologist, environmental philosopher | known_for = Co-Founder of [[Sierra Club]] | spouse = {{marriage|Louisa Wanda Strentzel (1847-1905)|1880|1905}} | children = Wanda Muir Hanna (25 March 1881 &ndash; 29 July 1942),<br/>Helen Muir Funk (23 January 1886 &ndash; 7 June 1964) | parents = Daniel Muir and Ann Gilrye | signature = John muir signature.svg }} '''John Muir''' (21 April 1838 &ndash; 24 December 1914<ref>{{cite web| url=http://www.notablebiographies.com/Mo-Ni/Muir-John.html| title=John Muir| publisher=Encyclopedia of World Biography| accessdate=25 September 2010}}</ref>) was an influential [[Scotland|Scottish]]-born [[United States|American]] [[naturalist]], author, environmental philosopher, glaciologist, writer, and early advocate of preservation of [[wilderness]] in the [[United States]]. His letters, essays, and books of his adventures in nature, especially in the [[Sierra Nevada (U.S.)|Sierra Nevada]] mountains of [[California]], have been read by millions of people. Among his many notable journeys throughout the wilderness, Muir traveled from the Upper Mississippi Basin to the [[Gulf of Mexico]] and kept a journal of his travels called '''A Thousand-Mile Walk''<nowiki/>'. Muir felt that the national parks and forests needed to be preserved and some resources which should be off-limits to industrial use.<ref>John Muir. (n.d.). In Encyclopedia Britannica.</ref> His activism helped to preserve the [[Yosemite Valley]], [[Sequoia National Pa