Editing 1872 in science (section)

==Conservation==
* March 1 – [[Yellowstone National Park]] is established in the United States, the world's first [[national park]]<ref>{{cite web|title=Yellowstone, the First National Park |url=http://memory.loc.gov/ammem/gmdhtml/yehtml/yeabout.html |accessdate=16 June 2011 |archiveurl=https://web.archive.org/web/20110629122651/http://memory.loc.gov/ammem/gmdhtml/yehtml/yeabout.html |archivedate=29 June 2011 |url-status=dead }}</ref><ref>[http://memory.loc.gov/cgi-bin/query/r?ammem/consrvbib:@field(NUMBER+@band(amrvl+vl002)) U.S. Statutes at Large, Vol. 17, Chap. 24, pp. 32-33. "An Act to set apart a certain Tract of Land lying near the Head-waters of the Yellowstone River as a public Park."] From The Evolution of the Conservation Movement, 1850-1920 collection, [[Library of Congress]].</ref>