Search by letter: S
Search by letter
Search by letter: S
- Space Observatory: Instruments and Science Beyond Earth’s Atmosphere Space observatory
- Space Oddity (1969): David Bowie's breakthrough song about astronaut Major Tom Space Oddity
- Space opera (science fiction subgenre) Space opera
- Space probe
- Space Race competition between two Cold War enemies, the Soviet Union (USSR) and the United States (US)
- Space rock (music genre) Space rock
- Space Shuttle (NASA reusable spacecraft) Space Shuttle
- Space Shuttle Atlantis (OV-104) Space Shuttle Atlantis
- Space Shuttle Buran (OK-1K1) Space Shuttle Buran
- Space Shuttle Challenger (OV-099): history, accident, and legacy Space Shuttle Challenger
- Space Shuttle Challenger disaster (January 28, 1986) Space Shuttle Challenger disaster
- Space Shuttle Columbia (OV-102): history, design, and legacy Space Shuttle Columbia
- Space Shuttle Columbia disaster February 1, 2003
- Space Shuttle Discovery (OV-103) Space Shuttle Discovery
- Space Shuttle Endeavour (OV-105) Space Shuttle Endeavour
- Space Shuttle Enterprise (OV-101) Space Shuttle Enterprise
- Space Shuttle Solid Rocket Boosters
- Space station
- Space Station Processing Facility
- Spacesuit: design, function and types of protective garments for spaceflight Space suit
- Space-time: the four-dimensional continuum of modern physics Space-time
- Space–time tradeoff in computing: principles, patterns, and examples Space-time tradeoff
- Spaceballs — Mel Brooks’ 1987 science-fiction parody film Spaceballs
- SpaceCamp (1986 family adventure film) SpaceCamp
- Spacecraft: vehicles for travel and operations beyond Earth's atmosphere Spacecraft
- Spaced Out (animated series) Spaced Out
- Spaceflight: Human and Robotic Travel Beyond Earth's Atmosphere Spaceflight
- Spaceport: facilities, functions, history and cultural depictions Spaceport
- Spaceship Earth — the global stewardship metaphor Spaceship Earth
- SpaceShipOne: the first privately built manned suborbital spaceplane SpaceShipOne
- Spacetoon — Arabic children's television channel and programming network Spacetoon
- Spacetoon Plus (Indonesia) Spacetoon Plus
- Spacewar! — the 1962 PDP-1 space combat game Spacewar!
- Spacewatch — University of Arizona survey of minor planets and near‑Earth objects Spacewatch
- SpaceX: American aerospace company, launch services, and satellite network SpaceX
- SpaceX Crew-1 (USCV-1): First Operational Crew Dragon Mission SpaceX Crew-1
- Spache Readability Formula
- Spackenkill, New York
- SPAD S.XIII — French World War I Fighter Aircraft SPAD S.XIII
- Spade — design, uses, history and differences from a shovel Spade
- Spadefoot toad
- Spaghetti: origin, characteristics, uses and cultural notes Spaghetti
- Spaghetti squash
- Spaghetti Western
- Spaghetti‑tree hoax: BBC April Fools' broadcast (1957) Spaghetti-tree hoax
- Spahn Ranch (Spahn Movie Ranch) Spahn Ranch
- Spaichingen — town in the Tuttlingen district of Baden-Württemberg, Germany Spaichingen
- Spain — geography, society, government and culture Spain
- Spain at the 2018 Winter Paralympics
- Spain at the Olympics
- Spain national Davis Cup team Spain Davis Cup team
- Spain men's national volleyball team
- Spain national football team (La Roja) — history, style and honours Spain national football team
- Spalding County, Georgia: Overview, Geography, History, and Communities Spalding County, Georgia
- Spalding, Nebraska: small village in Greeley County Spalding, Nebraska
- Spam (canned meat) Spam (food)
- Spamming (unsolicited electronic messaging) Spamming
- Span (extent or reach in architecture, time, mathematics, computing and language) Span
- Span (unit of length)
- Spanair — Catalonia-based Spanish airline (ceased operations 2012) Spanair
- Spanair Flight 5022 crash (20 August 2008) Spanair Flight 5022
- Spanakopita: Greek spinach and feta pastry Spanakopita
- Spandau — borough of Berlin Spandau
- Spandau Ballet (English New Romantic pop band) Spandau Ballet
- Spandau Prison: history, administration, and legacy Spandau Prison
- Spandrel: architectural space, ornament, and broader meanings Spandrel
- Spanglish (2004 film) Spanglish (movie)
- Spaniel (dog): breeds, history, characteristics, and care Spaniel
- Spanish language Spanish
- Spanish alphabet (abecedario) Spanish alphabet
- Spanish Armada (1588) — the attempted invasion of England Spanish Armada
- Spanish Civil War (1936–1939): causes, course, and legacy Spanish Civil War
- Spanish colonization of the Americas
- Spanish conquest of the Aztec Empire (1519–1521) Spanish conquest of the Aztec Empire
- Spanish conquest of Yucatán
- Spanish Empire (Hispanic Monarchy): Origins, Reach and Legacy Spanish Empire
- Spanish Fighting Bull (Toro Bravo): breed, history and cultural role Spanish Fighting Bull
- Spanish Fork, Utah
- Spanish Fort, Alabama
- Spanish Golden Age (El Siglo de Oro) Spanish Golden Age
- Spanish Grand Prix Formula One race
- Spanish Inquisition
- Spanish (Castilian): Overview, History, Features and Global Presence Spanish language
- Spanish naming customs: structure, history, and everyday use Spanish naming customs
- Spanish Republican government in exile
- Spanish Town, Jamaica Spanish Town
- Spanish treasure fleet (Flota de Indias) Spanish treasure fleet
- Spanish Wells: a compact Bahamian community on St. George's Cay Spanish Wells
- Spanish Wikipedia
- Spanish–American War (1898): Causes, Campaigns, and Consequences Spanish–American War
- Spanking: practice, effects, legal responses and alternatives Spanking
- Spanking the Monkey (1994 film) Spanking the Monkey
- Spanky Manikan — Filipino actor (1942–2018) Spanky Manikan
- Sparassodonts — extinct South American metatherian predators Sparassodont
- Spark M. Matsunaga (1916–1990) Spark Matsunaga
- Sparkling wine
- Sparkman, Arkansas
- Sparks, Oklahoma
- Sparky Anderson (1934–2010) — Baseball manager and Hall of Famer Sparky Anderson
- Sparrow (genus Passer) — Old World passerine birds Sparrow
- Sparrowhawk (Accipiter nisus): small Eurasian woodland raptor Sparrowhawk
- Sparta: Ancient Greek City-State and Modern Town Sparta
- Sparta Rotterdam: Dutch football club with a long history Sparta Rotterdam
- Sparta, Illinois
- Sparta, Kentucky
- Sparta, North Carolina
- Sparta, Wisconsin
- Spartacus — leader of the Third Servile War Spartacus
- Spartacus (1960 film) — Stanley Kubrick, Dalton Trumbo, and the epic of revolt Spartacus (movie)
- Spartacus League (Spartakusbund) — German Marxist revolutionary group Spartacus League
- Spartak Belyaev (1923–2017) — Russian theoretical physicist Spartak Belyaev
- Spartak Tennis Club — Moscow academy that produced Russian champions Spartak Tennis Club
- Spartanburg County, South Carolina
- Spartanburg, South Carolina: city profile, history, economy, and culture Spartanburg, South Carolina
- SPAS-12: Italian dual‑mode combat shotgun SPAS-12
- Spatula (kitchen utensil) Spatula
- Spaulding, California
- Spaulding, Oklahoma: Incorporated Town and Local Government Overview Spaulding, Oklahoma
- Spavinaw, Oklahoma: Small Town by the Lake Spavinaw, Oklahoma
- Spawn (biology)
- Spay (Sarthe): Commune in Pays de la Loire, France Spay, Sarthe
- Speak Now (Taylor Swift album) Speak Now
- Speaker: loudspeaker device, public speaker, and parliamentary speaker Speaker
- Speaker (politics)
- Speaker for the Dead
- Speaker of the Australian House of Representatives
- Speaker of the Grand National Assembly of Turkey Speaker of the Grand National Assembly
- Speaker of the Hellenic Parliament
- Speaker of the House of Commons
- Speaker of the House of Commons (United Kingdom)
- Speaker of the House of Representatives of Malta
- Speaker of the House of Representatives of the Philippines
- Speaker of the Lok Sabha
- Speaker of the National Assembly of Pakistan
- Speaker of the National Assembly of South Korea
- Speaker of the Parliament of Finland
- Speaker of the Parliament of Sri Lanka
- Speaker of the United States House of Representatives
- Spear: history, design, and uses Spear
- Spear-thrower (atlatl, woomera): a leverage weapon and its history Spear-thrower
- Spearman, Texas
- Spearman's rank correlation coefficient
- Spechbach-le-Bas: former commune in Haut-Rhin, Alsace (France) Spechbach-le-Bas
- Spechbach-le-Haut (former commune in Haut-Rhin, France) Spechbach-le-Haut
- Spechbach (Haut-Rhin) Spechbach, Haut-Rhin
- Special Achievement Award (Academy Awards) Special Achievement Academy Award
- Special Administrative Region (China): legal status, institutions, and features Special Administrative Region
- Special agent (United States law enforcement role) Special agent
- Special Branch (UK police units for national security) Special Branch
- Special Cases (Massive Attack song) Special Cases
- Special cities of Japan (Tokureishi): mid‑sized urban municipalities Special cities of Japan
- Special education: overview, approaches, and inclusion Special education
- Special effects: techniques, history, and uses in film and media Special effect
- Special English — simplified broadcast English developed by Voice of America Special English
- Special forces (special operations forces) Special forces
- Special Olympics: Global Sports Movement for People with Intellectual Disabilities Special Olympics
- Special Operations Executive (SOE) — British wartime clandestine service Special Operations Executive
- Special Order 191 (the "Lost Order") Special Order 191
- Special relativity: the special theory of relativity Special relativity
- Special wards of Tokyo one of the basic local entities of Japan
- Special-purpose district
- Specialist (U.S. Army rank) Specialist (rank)
- Specialized English: a simplified spoken form for international broadcasting Specialized English
- Specialized High Schools Admissions Test (SHSAT) Specialized High Schools Admissions Test
- Specialty Records: Los Angeles Rhythm & Blues and Early Rock Label Specialty Records
- Speciation: How new species arise and the mechanisms involved Speciation
- Species: definition, classification, and biological importance Species
- Speciesism: concept, history, ethical debates, and real-world examples Speciesism
- Specific gravity: the density of a substance relative to water Specific gravity
- Specific heat (specific heat capacity) Specific heat
- Specific impulse (Isp): a measure of rocket and jet propulsion efficiency Specific impulse
- Specific phobia
- Spectacled bear (Tremarctos ornatus): the Andean bear Spectacled bear
- Spectacled caiman (Caiman crocodilus) Spectacled caiman
- Spectral bat (Vampyrum spectrum): the largest New World carnivorous bat Spectral bat
- Spectral line — atomic and molecular spectroscopy Spectral line
- Spectre (2015 film) Spectre (2015 movie)
- Spectrograph: instrument for separating and recording a wave spectrum Spectrograph
- Spectrometer: instrument for measuring the properties of electromagnetic radiation Spectrometer
- Spectrophotometer: Principles, Types, and Practical Uses Spectrophotometer
- Spectroscopy: study of matter via interaction with electromagnetic radiation Spectroscopy
- Spectrum: visible light, types, and scientific importance Spectrum
- Spectrum (disambiguation)
- Spectrum of a Ring
- Speculation in finance Speculation
- Speculation and Vacancy Tax (British Columbia) Speculation tax
- Speculative execution
- Speech (spoken language): production, characteristics and disorders Speech
- Speech and language therapist
- Speech disorder
- Speech recognition: principles, history, applications and challenges Speech recognition
- Speed (physical quantity) Speed
- Speed (1994 film) Speed (1994 movie)
- Speed (Japanese girl group) Speed (band)
- Speed dating
- Speed limit
- Speed metal: origins, characteristics, and legacy Speed metal
- Speed of light
- Speed of Sound: Definition, Physics, Typical Values and Applications Speed of sound
- Speed of Sound (Walibi Holland) — Vekoma Boomerang Coaster Speed of Sound (roller coaster)
- Speed of Sound (Coldplay song) Speed of Sound (song)
- Speed Racer (2008 film) Speed Racer (movie)
- Speed skating: sport, history, equipment and race formats Speed skating
- Speedometer type of gauge that shows the speed a vehicle is moving
- Speedrun (video game fastest-completion practice) Speedrun
- Speedway, Indiana: Town of the Indianapolis Motor Speedway Speedway, Indiana
- Speicher (Appenzell Ausserrhoden) — Swiss municipality Speicher
- Spellbound (1945 film) Spellbound (1945 movie)
- Spelling bee: spoken-word spelling competitions and their role in education Spelling bee
- Spelt (Triticum spelta): an overview of the ancient hulled wheat Spelt
- Spencer Abraham: U.S. Senator from Michigan and U.S. Secretary of Energy Spencer Abraham
- Spencer Bachus — U.S. Representative and Financial Services Committee Chair (1993–2015) Spencer Bachus
- Spencer Bohren: American roots musician, teacher and visual artist Spencer Bohren
- Spencer Breslin
- Spencer Compton, 1st Earl of Wilmington
- Spencer County, Indiana — Overview, History, and Notable Places Spencer County, Indiana
- Spencer County, Kentucky
- Spencer Fox — American musician and former child voice actor Spencer Fox
- Spencer Grammer
- Spencer Gulf: geography, history, ecology and human use Spencer Gulf
- Spencer Johnson (author of Who Moved My Cheese?) Spencer Johnson
- Spencer Museum of Art (University of Kansas) Spencer Museum of Art
- Spencer P. Jones: New Zealand–born Australian guitarist and singer-songwriter Spencer P. Jones
- Spencer Perceval: British Prime Minister (1762–1812) and only UK PM to be assassinated Spencer Perceval
- Spencer Pratt — American reality television personality Spencer Pratt
- Spencer repeating rifle
- Spencer Smith — founding drummer of Panic! at the Disco Spencer Smith
- Spencer Tracy — American film and stage actor Spencer Tracy
- Spencer Tunick: Photographer of Large-Scale Nude Installations Spencer Tunick
- Spencer, Idaho
- Spencer, Indiana
- Spencer, Iowa
- Spencer, Oklahoma — small city in the Oklahoma City metropolitan area Spencer, Oklahoma
- Spencer, South Dakota
- Spencer, West Virginia
- Spencertown, New York
- Spengler Cup
- Spenserian stanza: structure, history and use in English poetry Spenserian stanza
- Spéracèdes — a perched commune in Alpes-Maritimes, Provence-Alpes-Côte d'Azur Spéracèdes
- Sperm: the male reproductive cell and its role in fertilization Sperm
- Sperm whale (Physeter macrocephalus) Sperm whale
- Spermatic cord — anatomy, function, development and clinical importance Spermatic cord
- Spermatophore: Packaged Sperm and Its Role in Animal Reproduction Spermatophore
- Spermicide — non-hormonal contraceptive agents Spermicide
- Spes — Roman personification of hope Spes
- Speyer — historic German city on the Rhine, noted for its Romanesque cathedral Speyer
- Spezia Calcio
- Sphagnum (peat moss): biology, ecology, and human uses Sphagnum
- Sphalerite: the primary zinc sulfide mineral Sphalerite
- Sphenodontia (Rhynchocephalia): the tuatara lineage Sphenodontia
- Sphenoid bone
- Sphere
- Sphere packing (geometry and applications) Sphere packing
- Spherical coordinate system
- Spherical geometry: geometry on the surface of a sphere Spherical geometry
- Spheroid: definition, types, geometry and natural examples Spheroid
- Sphingidae — hawk moths, sphinx moths and hornworms Sphingidae
- Sphinginae — a subfamily of hawkmoths Sphinginae
- Sphinx: Mythical guardian with a human head and the body of a lion Sphinx
- Sphygmomanometer: instrument for measuring blood pressure Sphygmomanometer
- Sphynx cat
- Sphyrna — genus of hammerhead sharks Sphyrna
- Spica (Alpha Virginis): a bright blue star of the constellation Virgo Spica
- Spice: definition, types, history and culinary uses Spice
- Spice (Spice Girls album) Spice (album)
- Spice Girls: Formation, music, members and cultural impact Spice Girls
- Spice Trade: Routes, History, and Global Impact Spice trade
- Spider: biology, behavior, diversity, and ecological role Spider
- Spider Kiss
- Spider monkey (genus Ateles) Spider monkey
- Spider Riders
- Spider silk: biology, properties, and human applications Spider silk
- Spider web: structure, function, and types Spider web
- Spider-Man: Origins, Abilities, Publication History and Cultural Impact Spider-Man
- Spider-Man (1994 TV series)
- Spider-Man (2002 film) Spider-Man (2002 movie)
- Spider-Man 2 (2004 film) Spider-Man 2
- Spider-Man 3 (2007 film): production, plot, reception and legacy Spider-Man 3
- Spider-Man 3 (2007 video game) Spider-Man 3 (video game)
- Spiderbait (Australian rock band) Spiderbait
- Spiderwebs (song)
- Spiekeroog — East Frisian Island in the North Sea Spiekeroog
- Spiere-Helkijn: small municipality in West Flanders, Belgium Spiere-Helkijn
- Spiez — lakeside town and municipality in Canton Bern, Switzerland Spiez
- Spijkenisse (South Holland) — city in the Netherlands Spijkenisse
- Spike: meanings, uses, and notable examples Spike
- Spike Cohen
- Spike Dudley (Matthew Hyson) Spike Dudley
- Spike Jonze
- Spike Lee: American Filmmaker, Writer, Producer and Actor Spike Lee
- Spike Milligan: comedian, writer, musician and influential satirist Spike Milligan
- Spike protein (viral surface glycoprotein) Spike protein
- Spillville, Iowa — small town known for Czech heritage and the Dvořák House Spillville, Iowa
- Spilsby, a market town in East Lindsey, Lincolnshire Spilsby
- Spin (rotation, quantum property, sports, and public relations) Spin
- Spin (magazine)
- Spin (physics): classical rotation and quantum intrinsic angular momentum Spin (physics)
- Spin valve (magnetoresistive device) Spin valve
- Spin welding (rotary friction welding) for thermoplastics Spin welding
- Spin-off: media franchises, corporate separations, and technology transfers Spin-off