- The United States Congress designated the Stephen Mather Wilderness in 1988 and it now has a total of 638,173 acres. \ All of this Wilderness is located in Washington and is managed by the National Park Service.
- Mathematics (Wikipedia)
Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics with the major subdisciplines of number theory, algebra, geometry, and analysis, respectively. There is no general consensus among mathematicians about a common definition for their academic discipline.