All articles starting with K
16,083 articles
Klenova (Venusian crater)
Klenova is a 141-km-diameter impact crater on Venus at 78.1°N, 104.5°E, IAU-named in 1985 for Soviet marine geologist Mariya Klenova; the largest crater mapped by Venera 15/16 and interpreted as a possible multiringed basin.
Kleo
Kleo is a German Netflix action-thriller series (2022–2024) by the HaRiBo team, starring Jella Haase as ex-Stasi assassin Kleo Straub seeking revenge after the Berlin Wall falls; two seasons, Grimme and German Television Award winner.
Klépierre
Klépierre is a French listed real estate investment trust owning 70 shopping centers in 12 countries, valued at €21.2 billion at the end of 2025.
Kleptocracy
Kleptocracy, literally 'rule by thieves,' is systemic rule in which top officials capture state resources for private gain via patronage and state capture, exemplified by Russia, Equatorial Guinea, and Hungary, and sustained by transnational money and reputation laundering.
Kleptomania
Kleptomania, an impulse control disorder in DSM-5 and ICD-11, is the recurrent failure to resist stealing unneeded items, with tension before and relief after; prevalence 0.3–2.6%.
Kleptoplasty
Kleptoplasty, or kleptoplastidy, is the sequestration and retention of functional algal chloroplasts by hosts such as dinoflagellates, ciliates, foraminifera, and sacoglossan sea slugs like Elysia chlorotica, which keep stolen plastids photosynthesizing for months.
Klerksdorp
Klerksdorp, North West province city and seat of the City of Matlosana Municipality on the Schoonspruit River; gold-mining town founded after the 1886 Rooikoppen gold strike, birthplace of Desmond Tutu.
Klerksdorp sphere
Klerksdorp spheres, also called Ottosdal objects, are small pyrite concretions in 3-billion-year-old rock near Ottosdal, South Africa, often promoted as out-of-place artifacts despite geologists classifying them as natural.
Klete Keller
Klete Keller, also Klete Derik Keller, American freestyle swimmer born 1982 in Las Vegas; two Olympic relay golds (2004, 2008) among five medals, later convicted for the January 6, 2021 Capitol riot and pardoned by Trump in 2025.
Klettgau Formation
Klettgau Formation: Late Triassic (Norian–Rhaetian) marl and dolostone unit of northern Switzerland, upper Keuper Group, six members, 30–55 m thick, source of Plateosaurus and Schleitheimia fossils.
Klezmer (כלי זמר)
Klezmer (כלי זמר), from Hebrew kley zemer, is the instrumental wedding and festival music of the Ashkenazi Jews of Eastern Europe, played by klezmorim; nearly extinct by the 1960s, it was revived by American Jewish musicians in the 1970s.
KLF1
KLF1 (EKLF, erythroid Krüppel-like factor) is a zinc finger transcription factor on chromosome 19, essential for terminal red cell differentiation, β-globin activation, and hemoglobin switching; variants cause In(Lu), HPFH, hemolytic anemia, and CDA type IV.
KLF2
KLF2 (LKLF, lung Krüppel-like factor), gene at 19p13.11, encodes a three-zinc-finger transcription factor binding CACCC/GC-rich promoters; shear-stress-induced endothelial vasoprotective and immune-cell migration regulator, distinct from KLF1 and KLF4.
KLF4
KLF4 (GKLF, EZF) is a human zinc finger transcription factor on 9q31.2 that binds CACCC elements, arrests the cell cycle via p21, reprograms stem cells with Oct4/Sox2/c-Myc, and acts as tumor suppressor or oncogene by context.
KLF5
KLF5 (BTEB2, IKLF) is a human zinc-finger transcription factor gene at 13q22.1 regulating proliferation, stemness, and cardiovascular remodeling; context-dependent oncogene in GI cancers and a proposed therapeutic target.
KLF6
KLF6 (KLF transcription factor 6; aliases BCD1, COPEB, ZF9) is a human gene at 10p15.2 encoding a Krüppel-like zinc finger transcription factor; a tumor suppressor whose oncogenic splice variant KLF6-SV1 is implicated in many cancers.
KLHL7-related Bohring-Opitz-like and Crisponi/Cold-induced sweating-like overlap syndrome
KLHL7-related Bohring-Opitz-like and Crisponi/Cold-induced sweating-like overlap syndrome, also called PERCHING syndrome, is a rare genetic disorder with neonatal onset caused by autosomal recessive variants in the KLHL7 gene.
KLIA Transit
KLIA Transit, or Laluan KLIA Transit, is a stopping airport rail service in Malaysia from Kuala Lumpur Sentral to KLIA, running alongside the non-stop KLIA Ekspres since 2002.
Kliff Kingsbury
Kliff Kingsbury, Air Raid quarterback-turned-coach: Texas Tech head coach 2013-18 (35-40), Arizona Cardinals head coach 2019-22 (28-37-1), USC analyst 2023, Washington Commanders OC 2024-25 with Jayden Daniels, Rams assistant head coach 2026.
Klim McPherson
Klim McPherson, born 1941, is a British epidemiologist and visiting professor at the University of Oxford, a Fellow of the Academy of Medical Sciences elected in 1998.
Klim Smolyatich
Klim Smolyatich (Клим Смолятич), also called Kliment, was Metropolitan of Kiev from 1147 to about 1155 and author of the Epistle to Presbyter Thomas, the only surviving work of a notable twelfth-century Rus' writer.
Klimaschutzgesetz
The Klimaschutzgesetz, formally the Bundes-Klimaschutzgesetz, is a German federal law enacted in 2019 that sets binding greenhouse gas targets, including 65% below 1990 levels by 2030.
Klimataria
Klimataria (Κλιματαριά), also the Piskokefalo Minoan Mansion or Klimataria–Manares building, is a two-storey Neopalatial Minoan country villa near Sitia, Crete, excavated by Nikolaos Platon from 1952 and reassessed in 2005 as a 'country villa'.
Kliment Kolesnikov
Kliment Kolesnikov (Климент Колесников), Russian backstroke swimmer born 2000 in Moscow; world record holder 50 m backstroke 23.55, six-time 2018 Youth Olympic champion, Tokyo 2020 silver and bronze, 2025 world champion as a neutral athlete.
Kliment Turnovski
Kliment Turnovski, born Vasil Nikolov Drumev (1841–1901), was a Bulgarian Orthodox hierarch, writer, and statesman who served twice as prime minister and was Metropolitan of Turnovo from 1884.
Kliment Voroshilov
Kliment Voroshilov (Климент Ефремович Ворошилов, 1881–1969), Soviet Marshal and Politburo member; People's Commissar of Defense 1925–1940, Winter War commander, head of state 1953–1960, Stalin loyalist involved in the 1937–1938 purges.
Kliment Voroshilov tank
The Kliment Voroshilov (KV) tank was a series of Soviet heavy tanks used by the Red Army in World War II, named after Defense Commissar Kliment Voroshilov.
Klimov (engine manufacturer)
Klimov, officially JSC UEC Klimov, is a Russian aircraft-engine manufacturer in Saint Petersburg, known for the M-105, the VK-1 turbojet of the MiG-15, and the TV3-117 helicopter engine.
Klimov VK-2500
The Klimov VK-2500 (ВК-2500) is a Russian turboshaft engine for medium helicopters, developed by Klimov in Saint Petersburg from the TV3-117 and powering Mi-8, Mi-28, and Ka-52 helicopters.
Klin-Yar
Klin-Yar (Клин-Яр, "crooked valley"), a multi-period cemetery near Kislovodsk, Stavropol Krai, North Caucasus, used from the 8th century BC Koban Culture through Sarmatian and Alanic phases to the 7th–8th centuries AD, with over 400 excavated graves and a rich 'elite plot' on a Silk Road branch.