All articles starting with R
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Runes
Runes are the letters of the Germanic runic alphabets, including the Elder Futhark, Younger Futhark, Anglo-Saxon Futhorc, and medieval runes, used from about 160 CE into the late Middle Ages across Scandinavia, England, and Frisia.
RuneScape
RuneScape is Jagex's fantasy MMORPG set in Gielinor, launched free-to-play in January 2001, with over 300 million accounts. Two versions exist: RuneScape 3 (29 skills) and Old School RuneScape (2013, 2007-based, 23 skills).
RuneScape: Dragonwilds
RuneScape: Dragonwilds is Jagex's open-world co-op survival crafting game set on Ashenfall, the first standalone RuneScape spin-off. Early Access April 15, 2025; 1.0 launch September 15, 2026 on PC and consoles; over one million Early Access sales.
Runestone
Runestone: a stone bearing a runic inscription, also called rune stone or runic memorial stone. Defined as carved on raised, worked, or in situ stones; Viking Age memorial custom peaks AD 970–1100, mostly in Sweden (Uppland), with the Svingerud stone the earliest dated.
Rừng xà nu
Rừng xà nu (Xa Nu Forest) is a 1965 short story by Nguyễn Trung Thành, pen name of Nguyên Ngọc, set in the Central Highlands village of Xô Man.
Runge–Kutta methods
Runge–Kutta methods are one-step numerical algorithms for solving ordinary differential equations, introduced by Carl Runge in 1895 and shaped into a general family by Wilhelm Kutta in 1901.
Runge–Kutta–Fehlberg method
The Runge–Kutta–Fehlberg method is an adaptive-step numerical method for ordinary differential equations, introduced by E. Fehlberg in 1968; its best-known instance, combining fourth- and fifth-order formulas, is RKF45.
Rungra People's Pleasure Ground
Rungra People's Pleasure Ground (릉라인민유원지), also called Rungna People's Pleasure Ground, is an amusement park on Rungra Island in Pyongyang, North Korea, opened in July 2012 by Kim Jong Un, with a dolphinarium, water park, and Zamperla rides.
Rungrado 1st of May Stadium
Rungrado 1st of May Stadium (Rungrado May Day Stadium), Pyongyang, North Korea, opened May 1, 1989 on Rungra Island. Official capacity 150,000, but independent seat counts after the 2014 renovation give about 114,000; largest football stadium, Arirang Mass Games venue.
Rungwe
Rungwe is an active stratovolcano in southwestern Tanzania near Lake Malawi, rising about 2,950 m and last erupting around 1250 CE, the southernmost volcano in the East African Rift System.
Runic calendar
A runic calendar is a perpetual calendar carved with runes on wooden staves and primstavs, used in Sweden and nearby areas from the late 13th century.
Runic inscriptions
Runic inscriptions are texts written in runic alphabets carved by Germanic peoples in northern Europe from roughly the 1st century AD until the late Middle Ages.
Runic magic
Runic magic: historical use of Germanic runes for amulets, charms, and curses. Elder/Younger Futhark script; runic divination is a modern invention, largely from Ralph Blum's 1982 Book of Runes and Guido von List's Armanen system.
Runner Runner
Runner Runner is a 2013 American crime thriller directed by Brad Furman, starring Justin Timberlake as a Princeton student drawn into an online gambling tycoon's operation.
Runner's high
Runner's high: transient euphoria, reduced anxiety and pain sensitivity during or after endurance exercise. Linked mainly to endocannabinoids (anandamide, 2-AG) released at moderate intensity; endorphins play a partial role.
Running
Running (course à pied) is a bipedal gait with an airborne phase and one of the oldest sports. Key facts: 776 BCE stadion race, World Athletics founded 1912, ~23% lower all-cause mortality with any dose, multifactorial injury risk.
Running (upcoming film)
Running is an upcoming Apple Original Films drama directed by Gavin O'Connor, written by Bill Dubuque, starring Spike Fearn as a homeless teen track prodigy, with Brian Tyree Henry, Rhea Seehorn, and Teyonah Parris; release date unannounced.
Running back
A running back (RB), also known as a halfback or tailback, is an offensive position in American football, usually the team's main ball carrier in rushing, receiving, and blocking.
Running coupling
A running coupling is a coupling constant in a quantum field theory whose value depends on the energy scale, or momentum transfer, at which a process is probed.
Running economy
Running economy (RE) is the steady-state oxygen consumption, or metabolic energy cost, required to run at a given submaximal velocity, and a key determinant of distance running performance.
Running Fence
Running Fence was a temporary 1976 outdoor artwork by Christo and Jeanne-Claude, a 24.5-mile-long, 18-foot-high white nylon fence running across Northern California ranchlands into the Pacific Ocean.
Running Man (런닝맨) (TV program)
Running Man (런닝맨) is SBS's Korean variety show, airing since July 11, 2010, famous for name-tag ripping chase games, a 564-episode record in 2021, over 800 episodes, and adaptations such as China's Keep Running.
Running of the bulls
Running of the bulls (encierro), the daily 8 a.m. bull run of Pamplona's San Fermín festival, July 7–14: six bulls and steers over an 848.6–875 m route, rules, history, Hemingway, and 2025 impact.
Running on Empty (1988 film)
Running on Empty is a 1988 American drama directed by Sidney Lumet, written by Naomi Foner, starring Christine Lahti, River Phoenix, and Judd Hirsch as a fugitive antiwar family; Golden Globe-winning, Oscar-nominated film released September 9, 1988.
Running on Empty (2024 film)
Running on Empty is a 2024 American romantic comedy directed by Daniel André, starring Keir Gilchrist as a mortician who learns he has 345 days to live.
Running on Empty (album)
Running on Empty, Jackson Browne's fifth album (Asylum, December 6, 1977), is a live album of all-new songs recorded on tour on stages, in hotel rooms, in rehearsal halls, and on his bus; it reached #3 on the Billboard 200.
Running on Karma (大只佬)
Running on Karma (大只佬/大块头有大智慧), a 2003 Hong Kong film by Johnnie To and Wai Ka-fai starring Andy Lau and Cecilia Cheung, won Best Film, Best Actor, and Best Screenplay at the 23rd Hong Kong Film Awards.
Running Out of Time (暗战)
Running Out of Time (暗战, Am zin) is a 1999 Johnnie To Hong Kong crime thriller starring Andy Lau as a dying thief playing a 72-hour game with Lau Ching-wan's police negotiator; it won Lau the 2000 Hong Kong Film Award for Best Actor and spawned a 2001 sequel.
Running Out of Time 2 (暗战2)
Running Out of Time 2 (暗戰2/暗战2, Am zin 2) is a 2001 Hong Kong action thriller by Johnnie To and Law Wing-cheong, a Milkyway Image sequel to Running Out of Time (1999), starring Lau Ching-wan and Ekin Cheng in a magician-thief cat-and-mouse game.
Running Point
Running Point is an American sports comedy series that premiered on Netflix in 2025, starring Kate Hudson as a reformed party girl who becomes president of her family's basketball team.