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5 days ago · v. t. e. The history of mathematics deals with the origin of discoveries in mathematics and the mathematical methods and notation of the past. Before the modern age and the worldwide spread of knowledge, written examples of new mathematical developments have come to light only in a few locales.
4 days ago · By the end of the 20th century, true guns with calibers larger than about 60 mm have become very rare in artillery use, the main users being tanks, ships, and a few residual anti-aircraft and coastal guns. The term "cannon" is a United States generic term that includes guns, howitzers, and mortars; it is not used in other English speaking armies.
2 days ago · In general, the early modern period is considered to have lasted from the 16th to the 19th centuries (about 1500–1800). In a European context, it is defined as the period following the Middle Ages and preceding the advent of modernity, sometimes defined as the "late modern period". In the context of global history, the early modern period is ...
2 days ago · Thomas Edison (born February 11, 1847, Milan, Ohio, U.S.—died October 18, 1931, West Orange, New Jersey) was an American inventor who, singly or jointly, held a world-record 1,093 patents. In addition, he created the world’s first industrial research laboratory. The role of chemistry in Thomas Edison's inventions.
4 days ago · Kristen L. Rouse. The Jungle is a novel by Upton Sinclair, published serially in 1905 and as a book in 1906. An exposé of the American meatpacking industry and the horrors endured by immigrant workers generated public outrage resulting in passage of federal legislation that improved food quality and working conditions.
4 days ago · The Nineteenth Amendment to the Constitution of the United States, ratified in 1920. A subsequent attempt to pass the amendment came in 1919, and this time it passed both chambers with the requisite two-thirds majority—304–89 in the House of Representatives on May 21, and 56–25 in the Senate on June 4. Although the amendment’s fate ...
2 days ago · Generation X, a term typically used to describe the generation of Americans born between 1965 and 1980, although some sources use slightly different ranges. It has sometimes been called the “middle child” generation, as it follows the well-known baby boomer generation and precedes the millennial generation ( Generation Y, meaning those born ...
