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The Sahel region (/səˈhɛl/; from Arabic ساحل (sāḥil [ˈsaːħil]) 'coast, shore'), or Sahelian acacia savanna, is a biogeographical region in Africa. It is the transition zone between the more humid Sudanian savannas to its south and the drier Sahara to the north. The Sahel has a hot semi-arid climate …

Empirical evidence is evidence obtained through sense experience or experimental procedure. It is of central importance to the sciences and plays a role in various other fields, like epistemology and law.…

Walter Bernard Hess (October 28, 1894 – August 30, 1963) was a professional American football running back in the National Football League (NFL). He played six seasons for the Hammond Pros, with three of those seasons as a player-coach.…

A mathematical object is an abstract concept arising in mathematics. Typically, a mathematical object can be a value that can be assigned to a symbol, and therefore can be involved in formulas. Commonly encountered mathematical objects include numbers, expressions, shapes, functions, and sets. Mathe…

A corporation's share capital, commonly referred to as capital stock in the United States, is the portion of a corporation's equity that has been derived by the issue of shares in the corporation to a shareholder, usually for cash.…

The Northwest Territories is a territory of Canada. At a land area of approximately 1,127,711.92 km2 (435,412.01 sq mi) and a 2025 estimated population of 45,848, it is the second-largest and second-most populous of the three territories in Northern Canada. Under its modern borders, the Northwest Te…

In mathematics, a basic semialgebraic set is a set defined by polynomial equalities and polynomial inequalities, and a semialgebraic set is a finite union of basic semialgebraic sets. A semialgebraic function is a function with a semialgebraic graph. Such sets and functions are mainly studied in rea…

The American frontier, also known as the Old West, and popularly known as the Wild West, encompasses the geography, history, folklore, and culture associated with the forward wave of American expansion in mainland North America that began with European colonial settlements in the early 17th century …

Francis Patton Bretherton (July 6, 1935 – June 27, 2021) was an English-born American applied mathematician and a professor emeritus of the Department of Atmospheric and Oceanic Sciences at the University of Wisconsin, Madison.…

Scientific consensus is the collective judgment, position, and opinion of the vast majority of active, qualified experts on a conclusion in a specific scientific discipline. Scientific consensus results from the self-correcting scientific process of peer review, replication of the event through the …