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Sturgis, South Dakota
Sturgis, South Dakota: Meade County seat city of about 7,000 at the northern Black Hills, named for General Samuel D. Sturgis, host since 1938 of the Sturgis Motorcycle Rally, the world's largest motorcycle rally.
Sturia
Sturia is an extinct genus of Triassic ammonoid cephalopods in the family Sturiidae, established by Mojsisovics in 1882; not to be confused with the European sturgeon Acipenser sturio. Characterized by involute, smooth shells with sharp spiral lines and ammonitic septa.
Sturla Holm Lægreid
Sturla Holm Lægreid (born 1997, Bærum) is a Norwegian biathlete, 2024/25 overall World Cup champion, Beijing 2022 relay gold medalist, and winner of 19 World Cup races with 14 World Championship medals.
Sturlunga saga
Sturlunga saga is a compilation of contemporary sagas about twelfth- and thirteenth-century Iceland, assembled around 1300 and named for the powerful Sturlung family, covering 1117 to 1264.
Sturm und Drang
Sturm und Drang (Storm and Stress), German literary movement c. 1767–1785 named after Klinger's 1776 play; genius cult, Shakespeare worship, prose drama; Goethe, Herder, Schiller, Lenz; reaction to Enlightenment rationalism, precursor to Weimar Classicism and Romanticism.
Sturm–Liouville theory
Sturm–Liouville theory is the branch of analysis studying second-order linear differential eigenvalue problems with boundary conditions; created by Sturm and Liouville in 1836–1837, it underlies Fourier series and eigenfunction expansions in mathematical physics.
Sturm, Ruger & Co.
Sturm, Ruger & Co. is an American firearms manufacturer founded in 1949 by William B. Ruger and Alexander Sturm in Southport, Connecticut, making rifles, pistols, revolvers, and shotguns.
Sturmabteilung
Sturmabteilung (SA), the Nazi Party's paramilitary wing, also called Storm Troopers or Brownshirts. Founded 1921, peaked at about 4 million members by April 1934, purged in the Night of the Long Knives, reduced to pre-military training, disbanded 1945.
Sturmey-Archer
Sturmey-Archer is a bicycle component manufacturer founded in Nottingham, England, in 1902, best known for the internal gear hub sold to over 80 million cyclists.
Sturmgeschütz III
The Sturmgeschütz III, also known as the StuG III, was a German assault gun of the Second World War built on the Panzer III chassis with a fixed casemate gun.
Sturmgeschütz IV
The Sturmgeschütz IV (StuG IV) was a German assault gun and tank destroyer of World War II, combining the StuG III superstructure and gun with the Panzer IV chassis.
Sturmian word
A Sturmian word, also known as a billiard sequence, is an infinite word over two letters with exactly n + 1 distinct subwords of each length n, the minimum for an aperiodic word.
Sturmtiger
The Sturmtiger, officially Sturmmörserwagen 606/4 mit 38 cm RW 61, was a German heavy assault gun built on the Tiger I chassis, of which only 18 were made.
Sturnella
Sturnella (meadowlarks) is a Vieillot 1816 genus of Icteridae songbirds, now limited to yellow-breasted North American meadowlarks (magna, neglecta, lilianae); South American red-breasted species moved to Leistes.
Sturniolo Triplets
Sturniolo Triplets: Nick, Matt, and Chris Sturniolo, identical triplet brothers born 2003 in Somerville, Massachusetts, known for car-based Q&A YouTube vlogs started October 2020, 7.7M subscribers, the Cut the Camera podcast, and individual brands.
Sturnira
Sturnira, the yellow-shouldered bats (Gray, 1842), is the most speciose frugivorous bat genus of Neotropical Phyllostomidae, with 22 species from Mexico to Argentina, Andean origin, and a signature Sturnira-Solanum seed-dispersal role.
Sturnus
Sturnus (starlings) is a genus of Sturnidae passerines erected by Linnaeus in 1758, now limited to the Common Starling Sturnus vulgaris and Spotless Starling S. unicolor; known for communal roosts, murmurations, and invasive status.
Sturt National Park
Sturt National Park, NSW's largest western park at 325,329 ha in the arid Corner Country near Tibooburra, borders Queensland and South Australia, contains Ramsar-listed Lake Pinaroo and the Dingo Fence, and hosts the Wild Deserts mammal reintroduction project.
Sturtian glaciation
The Sturtian glaciation was a global Snowball Earth glaciation of the Cryogenian Period, from about 717 to 660 million years ago, the longest in Earth history.
Stüssy
Stüssy is an American streetwear brand founded around 1980 by Laguna Beach surfboard shaper Shawn Stussy, who signed his boards and T-shirts with his scrawled surname; formally established in 1984 with Frank Sinatra Jr., it pioneered the International Stüssy Tribe and global streetwear.
Stuti Chintamani
Stuti Chintamani (Odia: ସ୍ତୁତି ଚିନ୍ତାମଣି) is a devotional poem of one hundred prayers composed in Odia by Bhima Bhoi, a foundational text of the Mahima Dharma tradition.
Stuti G. Shroff
Stuti G. Shroff is an anatomic and molecular pathologist specializing in gastrointestinal and hepatic pathology, an assistant professor at Harvard Medical School and Massachusetts General Hospital since 2018.
Stuttering
Stuttering (stammering) is a neurodevelopmental speech disorder of repetitions, prolongations, and blocks, affecting over 5% of preschool children, chronic in about 1% of adults, with genetic and neurogenic forms.
Stuttgart
Stuttgart, capital of Baden-Württemberg since 1952, is a German city of about 605,000 in the Neckar basin, a mobility-industry and financial center, home of Stuttgart 21 and Rosenstein, with a Climate Mobility Plan targeting 40% CO2 cuts by 2030.
Stuttgart 21
Stuttgart 21 (S21) is a German railway project converting Stuttgart's terminal main station into an underground eight-track through station, part of the larger Stuttgart–Ulm rail project.
Stuttgart Airport
Stuttgart Airport, also known as Manfred Rommel Airport or Echterdingen Airport, is the largest airport in Baden-Württemberg, Germany, serving Stuttgart with 9.6 million passengers in 2025.
Stutthof concentration camp
Stutthof: Nazi German concentration and extermination camp (1939-1945) near Sztutowo east of Gdansk, Poland; about 110,000 detainees and over 60,000 deaths, 105 subcamps, liberated by Soviet forces on May 9, 1945.
Stüve-Wiedemann syndrome
Stüve-Wiedemann syndrome is a rare autosomal recessive skeletal dysplasia, first described in 1971, causing bowed long bones, camptodactyly, hyperthermia, and respiratory distress that is usually fatal in infancy.
Stuxnet
Stuxnet is a computer worm discovered in June 2010 that sabotaged about 1,000 gas centrifuges at Iran's Natanz uranium enrichment plant, the first cyberweapon known to cause physical damage.
Stuyvesant High School
Stuyvesant High School (02M475), founded 1904 at 345 Chambers Street, Manhattan, is New York City's most selective testing specialized high school, admitting students solely by SHSAT score, with the highest cutoff (561 for 2026).