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Portal:Illinois

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The flag of Illinois

Illinois (/ˌɪlɪˈnɔɪ/ IL-ih-NOY) is a state in the Midwestern region of the United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash and Ohio rivers to its south. Of the fifty U.S. states, Illinois has the fifth-largest gross domestic product (GDP), the sixth-largest population, and the 25th-most land area. Its capital city is Springfield in the center of the state, and the state's largest city is Chicago in the northeast.

Present-day Illinois was inhabited by Indigenous cultures for thousands of years. The French were the first Europeans to arrive, settling near the Mississippi and Illinois rivers in the 17th century Illinois Country, as part of their sprawling colony of New France. A century later, the revolutionary war Illinois campaign prefigured American involvement in the region. Following U.S. independence in 1783, which made the Mississippi River the national boundary, American settlers began arriving from Kentucky via the Ohio River. Illinois was soon part of the United States' oldest territory, the Northwest Territory, and in 1818 it achieved statehood. The Erie Canal brought increased commercial activity in the Great Lakes, and the invention of the self-scouring steel plow by Illinoisan John Deere turned the state's rich prairie into some of the world's most productive and valuable farmland, attracting immigrant farmers from Germany, Sweden and elsewhere.

In the mid-19th century, the Illinois and Michigan Canal and a sprawling railroad network facilitated trade, commerce, and settlement, making the state a transportation hub for the nation, especially in Chicago, which became the world's fastest growing city by the late 19th century. By 1900, the growth of industrial jobs in the northern cities and coal mining in the central and southern areas attracted immigrants from Eastern and Southern Europe. Illinois became one of America's most industrialized states and remains a major manufacturing center. The Great Migration from the South established a large Black community, particularly in Chicago, which became a leading cultural, economic, and population center; the Chicago metropolitan area holds about 65% of the state's 12.8 million residents.

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A small disc of Am-241 under the microscope.
A small disc of Am-241 under the microscope.

Americium is a radioactive transuranic chemical element with symbol Am and atomic number 95. This member of the actinide series is located in the periodic table under the lanthanide element europium, and thus by analogy was named after the Americas.

Americium was first produced in 1944 by the group of Glenn T. Seaborg from Berkeley, California, at the Metallurgical Laboratory of the University of Chicago, a part of the Manhattan Project. The discovery was kept secret and only released to the public in November 1945. Most americium is produced by uranium or plutonium being bombarded with neutrons in nuclear reactors – one tonne of spent nuclear fuel contains about 100 grams of americium. It is widely used in commercial ionization chamber smoke detectors, as well as in neutron sources and industrial gauges. Several unusual applications, such as nuclear batteries or fuel for space ships with nuclear propulsion, have been proposed for the isotope 242mAm, but they are as yet hindered by the scarcity and high price of this nuclear isomer.

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Selected biography

Mourners at Till's funeral, including his mother Mamie
Mourners at Till's funeral, including his mother Mamie

Emmett Till (July 25, 1941 – August 28, 1955) was an African-American teenager who was lynched in Mississippi at the age of 14 after reportedly flirting with a white woman. Till was from Chicago and visiting relatives in Money, a small town in the Mississippi Delta region. He spoke to 21-year-old Carolyn Bryant, the married proprietor of a small grocery store there. Several nights later, Bryant's husband Roy and his half-brother J. W. Milam went to Till's great-uncle's house and abducted the boy. They took him away and beat and mutilated him before shooting him and sinking his body in the Tallahatchie River. Three days later, Till's body was discovered and retrieved from the river.

Till's body was returned to Chicago. His mother, who had mostly raised him, insisted on a public funeral service with an open casket to show the world the brutality of the killing. Tens of thousands attended his funeral or viewed his casket and images of his mutilated body were published in black-oriented magazines and newspapers, rallying popular black support and white sympathy across the U.S. Intense scrutiny was brought to bear on the condition of black civil rights in Mississippi, with newspapers around the country critical of the state. In September 1955, Bryant and Milam were acquitted of Till's kidnapping and murder. Protected against double jeopardy, Bryant and Milam publicly admitted in an interview with Look magazine that they killed Till. The trial of Bryant and Milam attracted a vast amount of press attention. Till's murder is noted as a pivotal catalyst to the next phase of the Civil Rights Movement. (Read more...)

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10 March 2026 – Tornadoes of 2026
At least two are killed and six are injured after a hailstorm and four possible tornadoes strike the vicinity of Kankakee, Illinois, and Wheatfield, Indiana, United States. (WLS-TV)

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Culture: Chicago Blues FestivalChicago Jazz FestivalChicago Symphony OrchestraCornerstone FestivalDillo DayIllinois Shakespeare FestivalIllinois State FairIllinois' Poets LaureateList of museums in IllinoisLollapaloozaLyric Opera of ChicagoMusicPitchfork Music FestivalRavinia FestivalTaste of Chicago

Education: Higher educationSecondary education

Environment: Ecoregions of IllinoisGeography of IllinoisGeology of IllinoisProtected areas of Illinois

Government: ConstitutionEconomyPoliticsState Capitol

History: ChicagoIlliniwekIllinois CentralIllinois-Wabash CompanyIllinois TerritoryAbraham LincolnBlack Hawk WarCahokia1871 Great Chicago FireMakataimeshekiakiakMiamiMississippian cultureNorthwest TerritoryPotawatomiRoute 66Sauk

People: Governors of IllinoisMayors of ChicagoLongest Serving Mayor in IllinoisOrder of Lincoln Laureates

Sports: Chicago BanditsChicago BearsChicago BullsChicago CubsChicago FireChicago RushChicago SkyChicago White SoxChicago WolvesThe Fighting IlliniIllinois State RedbirdsNorthwestern WildcatsPeoria RivermenRockford IceHogsRockford ThunderSouthern Illinois MinersSouthern Illinois University SalukisChicago Yacht Club Race to MackinacChicago Marathon

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