All articles starting with R
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Ruben Um Nyobé
Ruben Um Nyobé (1913–1958), nicknamed Mpodol, was a Cameroonian anti-colonial leader who founded the UPC, demanding immediate independence from France and reunification of the Cameroons.
Rubén Uriza
Rubén Uriza Castro (1920-1992), Mexican show jumper; won individual silver on Hatuey and team gold at the 1948 London Olympics with Mariles and Valdés; later 1968 course designer.
Ruben Wolkowyski
Ruben Wolkowyski (Rubén Óscar Wolkowyski), Argentine basketball power forward/center born 1973 in Juan José Castelli; 2004 Olympic gold medalist, 2002 world silver medalist, and NBA player with Seattle and Boston.
Rubén Zamora
Rubén Zamora (Rubén Zamora Rivas), Salvadoran social-democratic politician; 1979 junta minister who resigned, FDR co-leader in exile, 1994 Democratic Convergence–FMLN presidential candidate (31.68% runoff), later deputy and ambassador to the US.
Rubens Barrichello
Rubens Barrichello, born 1972 in São Paulo, is a Brazilian racing driver; F1 1993–2011 with Jordan, Stewart, Ferrari, Honda, Brawn, Williams; 11 wins, 14 poles, 68 podiums; runner-up 2002 and 2004; 2014 Brazilian Stock Car champion.
Rubens Menin
Rubens Menin is a Brazilian civil engineer and entrepreneur who co-founded MRV Engenharia in 1979 and Banco Inter, and won EY World Entrepreneur Of The Year in 2018.
Rubens tube
The Rubens tube, also known as a flame tube, is a physics demonstration apparatus that makes acoustic standing waves visible as flames of varying height.
Rubenshuis
The Rubenshuis (Rubens House) is a museum in Antwerp, Belgium, housed in the former residence and studio of Peter Paul Rubens, who bought the house in 1610.
Rubeosis of iris
Rubeosis of iris (rubeosis iridis, iris neovascularization, NVI) is abnormal new blood vessel growth on the iris surface, secondary to retinal ischemia from diabetic retinopathy, central retinal vein occlusion, or carotid disease, and leading to neovascular glaucoma.
Rubeus Hagrid
Rubeus Hagrid, Hogwarts Keeper of Keys and Grounds and Care of Magical Creatures teacher in J. K. Rowling's Harry Potter series; gentle half-giant (human father, giantess Fridwulfa), Gryffindor, expelled in his third year for a crime he did not commit, voiced on screen by Robbie Coltrane and played by Nick Frost in the HBO series.
Rubí
Rubí, a municipality in Vallès Occidental, Barcelona province, Catalonia, in the riera de Rubí valley; 82,823 inhabitants (2025), industrial city with 11 estates, first recorded as Rivo Rubeo in 986, devastated by the 1962 flood.
Rubí (2004 TV series)
Rubí (2004) is a Mexican Televisa telenovela, aired on Canal de las Estrellas from May 17 to October 22, 2004, in 115 episodes, starring Bárbara Mori as the ambitious antiheroine Rubí Pérez Ochoa, adapted by Ximena Suárez from Yolanda Vargas Dulché's comic, and remade in 2020 with Camila Sodi.
Rubi Rose
Rubi Rose (Rubi Rose Benton), American rapper and model from Lexington, Kentucky; broke out via Migos' "Bad and Boujee" video, 2019 single "Big Mouth," 2020 mixtape For the Streets, 2021 XXL Freshman, later signed to Interscope via Mogul Vision.
Rubia
Rubia (madder), Old World Rubiaceae genus of about 80-87 species including R. tinctorum and R. cordifolia; roots yield alizarin and purpurin red dyes used since antiquity and in traditional medicine.
Rubia tinctorum
Rubia tinctorum (dyer's madder), a Rubiaceae perennial native from SE Europe to Xinjiang, whose alizarin- and purpurin-rich roots have dyed textiles red since 2000 BC; synthetic alizarin (1868) largely replaced it.
Rubiaceae
Rubiaceae, the coffee or madder family (Gentianales), is the fourth-largest angiosperm family with about 586 accepted genera and over 14,000 species, defined by interpetiolar stipules and inferior ovaries; includes Coffea, Cinchona, Gardenia, and Psychotria.
Rubiales field
The Rubiales field is a heavy oil field in the Llanos Basin near Puerto Gaitán, Colombia, discovered in 1981 and today the country's largest producer.
Rubicon
The Rubicon (Rubicone, Latin Rubico) is a small Romagna river, about 40 km long, that marked the Italy-Cisalpine Gaul border; Julius Caesar crossed it with the 13th Legion on 10 January 49 BC, starting the civil war. Its ancient course is disputed between the Fiumicino, Pisciatello, and Uso, with official identification in 1933.
Rubicon Mouth
Rubicon mouth (foce del Rubicone) is where the Rubicon river, Caesar's 49 BCE crossing point, enters the Adriatic near Gatteo a Mare, Forlì-Cesena, Emilia-Romagna, Italy; a surfing spot identified as the historic river in 1933.
Rubicon Technology Partners
Rubicon Technology Partners is a private equity firm based in Boulder, Colorado, founded in 2012, which makes control investments of roughly $50–350 million in enterprise software companies and closed a $1.7 billion fund in 2023.
Rubidium
Rubidium is a soft, silvery-white alkali metal, symbol Rb and atomic number 37, discovered in 1861 by Bunsen and Kirchhoff and best known for atomic clocks, rock dating, and the first Bose-Einstein condensate.
Rubidium atomic clock
A rubidium atomic clock, or rubidium frequency standard, locks a quartz oscillator to the rubidium-87 hyperfine transition, making it the most widely deployed type of atomic clock.
Rubidium standard
A rubidium standard, or rubidium frequency standard, is an atomic clock locked to the rubidium-87 hyperfine transition, the most widely deployed type, used in GPS satellites and cell towers.
Rubidium-87
Rubidium-87 is a radioactive isotope making up 27.83% of natural rubidium that decays to strontium-87 over 48.8 billion years, anchors portable atomic clocks, and was the atom of the first Bose-Einstein condensate in 1995.
Rubik's Cube
Rubik's Cube (originally Magic Cube, Bűvös kocka), invented by Ernő Rubik in 1974, is a 3x3x3 color-matching puzzle with 43 quintillion arrangements; over 350 million sold, WCA speedcubing since 2003, God's Number 20.
Rubik's Cube group
The Rubik's Cube group, also called the Rubik group, is the mathematical group of all legal positions of the Rubik's Cube, with about 43 quintillion elements.
Rubik's Magic
Rubik's Magic: Ernő Rubik's 1986 folding puzzle of 8 string-connected tiles in a 2×4 rectangle, Matchbox-made, goal to link three rings; 14 million sold, former WCA event.
Rubik's Snake
Rubik's Snake, also Rubik's Twist, is Ernő Rubik's 1981 chain puzzle of 24 triangular prisms with 23 four-position joints, twisted into shapes like the ball, dog, and duck.
Rubin (microarchitecture)
Rubin, also known as Nvidia Rubin, is a data center GPU microarchitecture from NVIDIA, announced in 2026 as the successor to Blackwell and the heart of the Vera Rubin platform.
Rubin Carter
Rubin "Hurricane" Carter (1937-2014), American middleweight boxer (27-12-1, 19 KOs) wrongly convicted twice of the 1966 Paterson Lafayette Bar triple murder, imprisoned nearly 20 years, freed in 1985, later an AIDWYC wrongful-conviction advocate. Not the Carter family singers, President Jimmy Carter, or the Rubin Observatory.