All articles starting with L
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Longest flights
The longest flights are scheduled nonstop airline services measured by great-circle distance, led since 2020 by Singapore Airlines' New York JFK–Singapore route at roughly 15,350 km and 18 hours 40 minutes.
Longest palindromic substring
The longest palindromic substring problem asks, for a given string, for its longest contiguous substring that reads the same forwards and backwards, solvable in O(n) time by Manacher's 1975 algorithm.
Longest path problem
The longest path problem is the NP-hard problem of finding a maximum-length simple path in a graph, solvable in linear time on directed acyclic graphs and applied to project scheduling.
Longest professional baseball game
Longest professional baseball game: Pawtucket Red Sox vs. Rochester Red Wings, Triple-A International League, McCoy Stadium, 1981; 33 innings, 8 hours 25 minutes, suspended at 2-2, Pawtucket won 3-2 on Dave Koza's single.
Longest recorded sniper kills
The longest recorded sniper kills are confirmed engagements at exceptional measured distances, tracked since 1967; the record is Viacheslav Kovalskyi's 3,800 m shot in Ukraine in 2023.
Longest tennis match records
Longest tennis match records: John Isner d. Nicolas Mahut, Wimbledon 2010, 11h 5m, 183 games, 70-68, over three days. Also longest doubles (Berdych/Rosol, 7h 2m, Davis Cup 2013), Davis Cup singles (Mayer d. Souza, 6h 43m), and women's (Nelson-Dunbar d. Hepner, 6h 31m) records; final-set tie-breaks since 2022 make the record unbreakable at majors.
Longest trains
The longest trains are freight trains, the record being a 7.353 km, 682-wagon iron ore train run by BHP 275 km to Port Hedland, Western Australia, in 2001.
Longest word in English
Longest word in English: no single answer. Dictionary record pneumonoultramicroscopicsilicovolcanoconiosis (45 letters), titin's 189,819-letter chemical name, antidisestablishmentarianism, and category records.
Longest words
Longest words: English's longest dictionary word is pneumonoultramicroscopicsilicovolcanoconiosis (45 letters), coined in 1935; titin's 189,819-letter chemical name and Sanskrit and Collins record-holders are also covered.
Longevity
Longevity is the duration of human life, measured by life expectancy and healthy life expectancy. Global life expectancy reached 73.3 years in 2024; genetics accounts for about 25 percent of lifespan variation.
Longevity claims
Longevity claims: assertions that interventions extend human lifespan or healthspan. Exercise has RCT support for healthspan; no human RCT shows lifespan extension; supplements, peptides, and reprogramming claims lack evidence and draw FTC and FDA scrutiny.
Longevity myths
Longevity myths: claims of extreme lifespans or immortality, from Gilgamesh, the biblical 120-year limit, and the Fountain of Youth to debunked supercentenarian age exaggeration in Caucasus, Hunza, and Vilcabamba, plus unproven modern anti-aging interventions.
Longevity Vision
Longevity Vision is a New York-based venture capital manager that raised two longevity-focused funds between 2019 and 2021, selling a combined $112 million to invest in companies extending healthy human life.
Longfellow Boom
The Longfellow Boom is a loud, unexplained booming noise reported for several decades by residents of the Longfellow community of Minneapolis, Minnesota, mostly on summer nights.
Longford
Longford (An Longfort) is an Irish midlands county and its county town, named from Longphort Uí Fhearghail, the O'Farrell stronghold. Census 2022 recorded 46,751 people, the fastest county growth in Ireland, and St Mel's Cathedral is its landmark.
Longford to Long Island Point Replacement Oil Pipeline
The Longford to Long Island Point Replacement Oil Pipeline is a 187 km crude oil pipeline in Gippsland, Victoria, built by Esso in 2017 for about $400 million.
Longford Town F.C.
Longford Town F.C. is an Irish football club founded in 1924, playing in the League of Ireland First Division; FAI Cup winners in 2003 and 2004.
Longformer
Longformer is a transformer language model introduced in 2020 by AI2 researchers for long documents, replacing standard self-attention with a linear-cost mix of local and global attention.
Longgang, Guangdong
Longgang (龙岗区) is a district of Shenzhen, Guangdong, China, in the city's northeast. Covering 388.21 square kilometers with about 3.98 million permanent residents, it is a top Chinese industrial district, home to Huawei and BYD, with a 2025 GDP of 609.592 billion yuan.
Longhang Asset Management
Longhang Asset Management (龙航资产) is a boutique Chinese private fund manager founded in 2018 by Cai Yingming, who remains its chairman and chief investment officer, in Shanghai.
Longhorn beetle
Longhorn beetle, family Cerambycidae (longhorned beetles, roundheaded borers): phytophagous beetles with antennae as long as or longer than the body; ~35,000+ species, wood-boring larvae, includes invasive Asian longhorned beetle.
Longhouse
A longhouse is a long, narrow rectangular dwelling that houses several families under one roof, built independently by cultures from Neolithic Europe to Viking Scandinavia and Borneo.
Longhua Tuchengzi City Site
隆化土城子城址 (Longhua Tuchengzi City Site): a Northern Wei to Yuan prefecture-city site in Longhua County, Chengde, Hebei, on the Yixun River; rammed-earth walls up to 747 m, excavated 1976-2007, national heritage site 2013.
Longhushan UNESCO Global Geopark
Longhushan UNESCO Global Geopark (龙虎山) is a nearly 1,000-square-kilometer protected area in Jiangxi Province, China, designated by UNESCO in 2015 and known as the cradle of Taoism.
LONGi
LONGi, also known as LONGi Green Energy (隆基绿能), is a Chinese solar technology company founded in Xi'an in 2000, producing monocrystalline silicon wafers, cells, and modules.
LONGi Green Energy
LONGi Green Energy, also known as LONGi Solar (隆基绿能), is a Chinese manufacturer of monocrystalline silicon wafers and solar modules, founded by Li Zhenguo in 2000 and the world's largest monocrystalline silicon maker by 2013.
Longin domain
Longin domain: conserved ~110-140-residue N-terminal regulatory domain of longin R-SNAREs (VAMP7, Ykt6, Sec22b) with profilin-like alpha-beta-alpha fold; also in adaptins, DENNs, TRAPP, and longin GAPs across all eukaryotes.
Longines
Longines is a Swiss watchmaker based in Saint-Imier, Switzerland, since 1832, known for its winged hourglass logo and decades as official timekeeper of major sports events.
Longini Fossatum/Bourgousnoes
Longini Fossatum/Bourgousnoes: a Tzanika fort in northeastern Anatolia named by Procopius (Aed. 3.6.24-25), where Justinian built Bourgousnoes; tentatively identified with Zindanlar Arazı near Gümüşhane, Barrington Atlas 87 E4.
Longinos (bishop)
Longinos (ܠܘܢܓܝܢܐ) was a sixth-century Miaphysite priest who became the first bishop of the Nobades in Nubia around 566 and baptized the king and nobles of Alodia about 580.