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Alto Golfo de California y El Pincate Biosphere Reserve
Alto Golfo de California y El Pincate is a UNESCO biosphere reserve in northeastern Mexico's Sonora state, designated in 1993 and the only home of the endangered vaquita porpoise.
Alto Knights
The Alto Knights is a 2025 Warner Bros. gangster drama, also formerly titled Wise Guys, directed by Barry Levinson and written by Nicholas Pileggi. Robert De Niro plays both Frank Costello and Vito Genovese; it flopped, grossing $6.1 million against a $45 million budget.
Alto Neuroscience
Alto Neuroscience is a clinical-stage biopharmaceutical company in Mountain View, California, founded by Stanford psychiatrist Amit Etkin in 2019, developing precision medicines for neuropsychiatric disorders.
Alto Orinoco-Casiquiare Biosphere Reserve
Alto Orinoco-Casiquiare Biosphere Reserve (RBAOC), Venezuela's largest, decreed 1991 and UNESCO MAB-designated 1993; 8,477,466 ha in Amazonas state protecting Orinoco headwaters and the Casiquiare channel linking Orinoco and Amazon basins, home mainly to Yanomami and Yekuana peoples.
Alto Pharmacy
Alto Pharmacy, formerly ScriptDash, is a San Francisco-based technology-enabled full-service pharmacy founded in 2015 by former Facebook engineers, offering same-day prescription delivery; it agreed to be acquired by Paulus Holdings in 2025.
Alto saxophone
Alto saxophone: E♭ transposing member of the saxophone family, sounding a major sixth lower than written, range C♯3–A♭5. Invented by Adolphe Sax, patented 1846; the standard student sax and a principal jazz and classical horn.
Alto Special Situations
Alto Special Situations is a Luxembourg-based investment firm making special situations and opportunistic investments in late-stage, high-growth private technology companies, with offices in London, Madrid, and Monaco.
Alto Turia Biosphere Reserve
Alto Turia Biosphere Reserve (Reserva de la Biosfera del Alto Turia), UNESCO MAB site designated 19 June 2019; 67,082.36 ha in Valencia and Cuenca provinces, Spain; eight municipalities, 4,153 inhabitants, managed by the Mancomunidad del Alto Turia; also a Starlight Reserve.
Altocumulus cloud
Altocumulus is a mid-level cloud genus of white or gray patches of rounded cloudlets, one of ten WMO cloud genera, usually signaling settled weather but with castellanus forms preceding thunderstorms.
Altoids
Altoids: British strong breath mints created in the 1780s by Smith Kendon, sold in iconic rectangular tins under the 'Curiously Strong' tagline; now Mars Wrigley-owned and US-made in Chattanooga, Tennessee.
Alton Brown
Alton Brown, American TV personality and author, creator and host of Good Eats on Food Network (premiered 1999, 14 seasons, Peabody Award), also hosted Cutthroat Kitchen and The Next Iron Chef; former cinematographer turned New England Culinary Institute graduate and touring performer.
Alton C. Dickieson
Alton C. Dickieson (1905–2000) was an American telecommunications engineer who spent his career at Bell Telephone Laboratories, leading the Telstar project and the Bell System's digital network from 1955.
Alton Coleman
Alton Coleman (1955-2002), American spree killer who with Debra Brown murdered eight people across six Midwestern states in 1984; captured as an FBI Ten Most Wanted fugitive, sentenced to death in three states, executed in Ohio in 2002.
Alton D. Romig Jr.
Alton D. Romig Jr. is an American materials scientist and engineering executive who spent over 30 years at Sandia National Laboratories and led Lockheed Martin's Skunk Works.
Alton Estate
The Alton Estate is a large 1950s London County Council council housing estate at Roehampton in southwest London, adjoining Richmond Park and home to over 13,000 people.
Alton Meister
Alton Meister (1922–1995) was an American biochemist who proposed the γ-glutamyl cycle linking glutathione to amino acid transport and later showed glutathione blocks HIV spread in cultures.
Alton Towers
Alton Towers: Staffordshire theme park resort opened 4 April 1980 around a Gothic stately home and Grade I gardens, owned by Merlin Entertainments, with 40+ rides, Nemesis, The Smiler, a waterpark and Scarefest.
Alton, Illinois
Alton, Illinois: Mississippi River city in Madison County, 25 miles north of St. Louis; site of the final 1858 Lincoln-Douglas debate, home of Robert Wadlow and Miles Davis; population 25,676 (2020).
Altoona Curve
Altoona Curve, Double-A Eastern League baseball team in Altoona, Pennsylvania, Pittsburgh Pirates affiliate since 1999 at Peoples Natural Gas Field; Eastern League champions 2010 and 2017, named for the Horseshoe Curve.
Altoona, PA Metro Area
Altoona, PA Metro Area (MSA code 11020), a Blair County, Pennsylvania metropolitan statistical area centered on Altoona; about 120,300 residents in 2024, 333th-ranked US metro, declining population, low-cost housing market.
Altoona, Pennsylvania
Altoona, Pennsylvania: Blair County city founded in 1849 by the Pennsylvania Railroad at the approach to Horseshoe Curve; 2020 population 43,963, declining; home of Sheetz and railroad heritage museums. Not the Iowa suburb of Des Moines.
Altostratus cloud
Altostratus is one of the ten basic cloud genera, a mid-level gray or bluish sheet through which the sun appears dimly, sometimes producing virga or very light precipitation.
Altovise Davis
Altovise Davis (Altovise Joanne Gore, 1943-2009), American dancer and actress, Broadway chorus performer and third wife of Sammy Davis Jr.; married 1970, adopted son Manny 1989, later managed his estate and tax debts.
Altra Industrial Motion
Altra Industrial Motion was a Braintree, Massachusetts maker of electromechanical power transmission and motion control products, sold to Regal Rexnord in 2023 for about $4.95 billion.
Altrad Group
Altrad Group is a French industrial services and equipment group founded in Montpellier in 1985 by Mohed Altrad, generating about €5.9 billion in 2025 with 65,000 employees.
Altretamine
Altretamine (hexamethylmelamine, Hexalen) is an oral alkylating antineoplastic approved by FDA in 1990 for palliative treatment of persistent or recurrent ovarian cancer; discontinued in the US, with limited activity in platinum-refractory disease.
Altria
Altria Group, formerly Philip Morris Companies, is an American tobacco company whose subsidiaries make Marlboro cigarettes, Copenhagen and Skoal, on! nicotine pouches, and NJOY e-vapor products.
Altrincham
Altrincham is a market town in Trafford, Greater Manchester, England, established by market charter in 1290 and known for its independent food scene and award-winning town-center regeneration.
Altruism
Altruism is costly behavior benefiting others at the actor's expense. Explained by kin selection (Hamilton 1964), reciprocal altruism (Trivers 1971), and group selection; debated whether reciprocity and kin selection are separable; studied in genetics, neuroscience, and effective altruism.
Altruism (ethics)
Ethical altruism, also called altruism (ethics), is the doctrine that others' good should be the principal goal of action. Covers Comte's 1851 coinage of altruisme, Mill, Sidgwick, Nagel, egoism debates, and demandingness objections.