All articles starting with R
22,461 articles
Rifkin's Festival
Rifkin's Festival is Woody Allen's 2020 comedy-romance starring Wallace Shawn, Gina Gershon, Elena Anaya, and Christoph Waltz, set at the San Sebastian Film Festival; it opened the 68th festival out of competition and earned mixed reviews (41% RT, Metascore 44).
Rifle
A rifle is a shoulder-fired firearm whose barrel is cut with spiral grooves that spin the projectile, distinguishing it from the smoothbore shotgun and giving long-range accuracy.
Rifle Club (റൈഫിൾ ക്ലബ്ബ്) (film)
Rifle Club (റൈഫിൾ ക്ലബ്ബ്) is a 2024 Malayalam action thriller directed and shot by Aashiq Abu, starring Dileesh Pothan, Anurag Kashyap, and Hanumankind; released 19 December 2024, grossing about Rs 16 crore, and streaming on Netflix since 16 January 2025.
Rifle grenade
A rifle grenade is a grenade designed to be launched from a rifle's muzzle, projecting it up to 218 yards and filling the gap between hand grenades and mortars.
Rifled muzzle loader
A rifled muzzle loader (RML) is an artillery piece with a rifled bore that is loaded through the muzzle, dominating heavy guns from the 1860s to the 1880s.
Rifleman's Creed
Rifleman's Creed, or My Rifle: The Creed of a United States Marine, an unofficial USMC creed attributed to MajGen William H. Rupertus, first published March 14, 1942, memorized by recruits and tied to 'Every Marine is a rifleman.'
Rifling
Rifling, or a rifled barrel, is a set of helical grooves machined into a firearm barrel that spins the projectile for stability, used since the 1490s and central to forensic bullet identification.
Rifqät Bağdanof
Rifqät Bağdanof, or Rifkat Ibragimovich Bogdanov (Рифкат Ибрагимович Богданов; 1950–2013), is a Russian mathematician known for the Bogdanov–Takens bifurcation and a student of Vladimir Arnold.
Rift of the NecroDancer
Rift of the NecroDancer is a 2025 lane-based rhythm game by Brace Yourself Games and Tic Toc Games, a spin-off of Crypt of the NecroDancer where monsters act as notes across three lanes, with four difficulties, Remix Mode, and licensed music packs.
Rift valley
Rift valley: an elongated trough formed where lithosphere stretches between normal faults, as in the East African Rift, Baikal Rift, and Rhine Valley; some rifts become ocean basins, others fail and stay dormant.
Rift Valley fever
Rift Valley fever (RVF), a mosquito-borne Phlebovirus zoonosis first identified in Kenya in 1931, infects livestock and humans via contact with animal blood or Aedes/Culex mosquito bites; no human-to-human spread documented.
Rift Valley fever virus
Rift Valley fever virus (RVFV) is a mosquito-borne phlebovirus, first isolated in Kenya in 1930, that causes abortion storms and high mortality in young livestock and a usually mild but sometimes severe illness in humans.
Riftbound
Riftbound is Riot Games' physical League of Legends trading card game, launched in English October 31, 2025 with the Origins set. Players use 40-card decks, a 12-card rune resource deck, and battlefield control (8 points to win) in 2-4 player matches.
Riga
Riga (Rīga) is the capital and largest city of Latvia, founded in 1201 by Bishop Albert von Buxhoeveden, where the Daugava meets the Baltic Sea.
Riga Film Studio
Riga Film Studio, also known as Rīgas Kinostudija, is a Latvian film production company founded in 1948. After privatization in 2004, it provides services for foreign productions.
Riga International Airport
Riga International Airport (RIX) is Latvia's main airport and the largest Baltic aviation hub, about 10 km from central Riga. It handled 7.1 million passengers and 20,100 tonnes of cargo in 2025 and is expanding its terminal by 2030.
Riga Latvian Society
The Riga Latvian Society (Latvian: Rīgas Latviešu biedrība) is a cultural organization in Riga, Latvia, founded in 1868 and known as the oldest Latvian organization in the world.
Riga National Zoological Garden
Riga National Zoological Garden (Rīga ZOO, Rīgas Nacionālais zooloģiskais dārzs), Latvia's oldest zoo, opened 1912 in Mežaparks, Riga; EAZA member since 1992, 353 species, Masterplan 2035, merged into Rīgas meži in 2026.
Rigaku
Rigaku is a Japanese manufacturer of X-ray analytical and measurement instruments, founded in Tokyo in 1951 and headquartered in Akishima, known for X-ray diffraction and semiconductor metrology.
Rigas Feraios
Rigas Feraios, more properly Rigas Velestinlis, was a Greek writer and revolutionary who planned an uprising against Ottoman rule and was executed in Belgrade in 1798.
Rīgas Zeļļi
Rīgas Zeļļi (Riga Zelli) is a privately financed Latvian basketball club founded in 2023 from the 'Ūdenszeļļi' TV show, a VEF Rīga rival playing the Latvian–Estonian League, LBL and, from 2026/27, the EuroCup.
Rigatona Corona
Rigatona Corona is a 300-km-wide concentric double-ring corona on Venus at 33.5 S, 278.5 E in Themis Regio quadrangle V-53, IAU-named in 1991 for a Celtic fertility goddess.
Rigel
Rigel, also known as Beta Orionis, is a blue-white B8 supergiant in Orion and the constellation's brightest star, about 850 light-years from Earth with a surface temperature near 12,000 K.
Rigetti Computing
Rigetti Computing, founded in 2013 by Chad Rigetti in Berkeley, California, is a full-stack quantum computing company that builds superconducting quantum processors and sells cloud access to them.
Rigged Hilbert space
A rigged Hilbert space, also called a Gelfand triple, is a chain of spaces Φ ⊂ H ⊂ Φ× that gives rigorous meaning to the generalized eigenvectors of quantum mechanics.
Riggs Bank
Riggs Bank (Riggs National Bank of Washington, D.C.), 1840-2005 Washington bank known as the Bank of Presidents; served 23 presidents and 95 percent of DC embassies; headquarters now the Riggs Washington DC hotel.
Righeira
Righeira is an Italian Italo disco duo from Turin, formed by Stefano Righi and Stefano Rota, whose 1983 single "Vamos a la playa" sold three million copies.
Right (film)
Right (ரைட்) is a 2025 Tamil single-location thriller, the debut film of director Subramanian Ramesh Kumar, starring Natty, Arun Pandian, and Akshara Reddy. Released 26 September 2025 by RTS Film Factory; a father searching for his missing son is trapped in a sealed Kovalam police station.
Right angle
A right angle, also called a ninety-degree angle, is an angle of 90 degrees, a quarter of a full rotation; lines meeting at one are perpendicular.
Right aortic arch
Right-sided aortic arch (RAA), a congenital variant where the aortic arch courses right of the trachea, occurring in about 0.1% of people; main types are mirror-image branching and aberrant left subclavian artery, the latter forming a compressive vascular ring.