Scientists, inventors, and mathematicians
Notable peoplePoliticians and leadersScientists, inventors, and mathematiciansWriters and journalistsReligious figuresRevolutionaries and activistsPhilosophers and social scientistsWritersScientists, inventors and mathematiciansMusicians and composersPhilosophers, historians, political and social scientistsVisual artistsSports figuresMilitary leaders and theoristsRebels, revolutionaries and activistsEntertainersLeaders and politiciansExplorersDirectors, producers and screenwritersBusinesspeopleScientists and inventorsMathematiciansJournalistsArtistsMusiciansCriminalsFilmmakers
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- R. Rajalakshmi (scientist)Indian biochemist and nutritionist
- Rachel BeanAmerican astronomer
- Rachel Chan (biologist)Argentine scientist
- Rachel Fuller BrownAmerican chemist (1898–1980)
- Rachel McKendryBritish chemist and digital public health pioneer
- Rachel Wilson (neurobiologist)American neurobiologist
- Rachel Zimmerman21st-century Canadian space scientist and inventor
- Rada BorićCroatian feminist
- Radford M. NealRadford M. Neal (born September 12, 1956) is a professor emeritus at the Department of Sta
- Radhanath SikdarIndian mathematician (1813–1870)
- Radhika NagpalIndian-American computer scientist
- Radia PerlmanAmerican software designer and network engineer
- RadiodensityRadiodensity (or radiopacity) is opacity to the radio wave and X-ray portion of the electr
- Rainer WeissAmerican physicist (1932–2025)
- Ramaiyengar SridharanRamaiyengar Sridharan is a mathematician at Chennai Mathematical Institute, formerly at th
- Rampa RattanarithikulThai entomologist
- Rana DajaniJordanian biologist, and academic
- Random early detectionRandom early detection (RED), also known as random early discard or random early drop, is
- Rankine theoryRankine's theory (maximum-normal stress theory), developed in 1857 by William John Macquor
- Raphine, VirginiaRaphine is an unincorporated community in Rockbridge County in the Shenandoah Valley in th
- Ratner's theoremsIn mathematics, Ratner's theorems are a group of major theorems in ergodic theory concerni
- Raukkan, South AustraliaRaukkan is an Australian Aboriginal community situated on the south-eastern shore of Lake
- Ray TomlinsonAmerican computer programmer (1941–2016)
- Rayleigh distributionProbability distribution
- Rayleigh flowIn fluid dynamics, Rayleigh flow (after English physicist Lord Rayleigh) refers to frictio
- Rayleigh lengthIn optics and especially laser science, the Rayleigh length or Rayleigh range, , is the di
- Raymond DamadianAmerican physician and inventor (1936–2022)
- Raymond Davis Jr.American scientist (1914–2006)
- Raymond ReiterRaymond Reiter FRSC (; June 12, 1939 – September 16, 2002) was a Canadian computer scienti
- Raymond Woodard BrinkRaymond Woodard Brink (4 January 1890 in Newark, New Jersey – 27 December 1973 in La Jolla
- Rebecca AbergelFrench inorganic chemist
- Rebecca GrinterAmerican computer scientist
- Rebecca LancefieldAmerican microbiologist (1895–1981)
- Rebecca Moore (scientist)American software engineer (born 1955)
- Reciprocity (photography)In photography, reciprocity is the inverse relationship between the intensity and duration
- ReclusePerson who lives in voluntary seclusion from the public and society
- Reginald FessendenCanadian-American electrical engineer and inventor (1866–1932)
- Regna DarnellCanadian anthropologist
- Reidun TwarockGerman mathematician
- Reiko KurodaJapanese chemist
- Reinhard GenzelGerman astrophysicist (born 1952)
- Réka AlbertRomanian-Hungarian scientist
- Relation algebraIn mathematics and abstract algebra, a relation algebra is a residuated Boolean algebra ex
- Relaxation (NMR)In magnetic resonance imaging (MRI) and nuclear magnetic resonance spectroscopy (NMR), an
- Renato DulbeccoRenato Dulbecco ( dul-BEK-oh, Italian: ; February 22, 1914 – February 19, 2012) was an Ita
- René Antoine Ferchault de RéaumurFrench entomologist and writer (1683–1757)
- René LaennecFrench physician (1781–1826)
- RenormalonIn physics, a renormalon (a term suggested by 't Hooft) is a particular source of divergen
- Reproductive synchronyReproductive synchrony is a term used in evolutionary biology and behavioral ecology. Repr
- ReptationA peculiarity of thermal motion of very long linear macromolecules in entangled polymer me
- Republic of GenevaEuropean city-state (1534–1798; 1813–1815)
- Residency (medicine)Postgraduate medical training
- Rhea Lydia GrahamAmerican geologist
- Rhian TouyzSouth African medical researcher
- Rhine ProvinceFormer province of the Kingdom of Prussia and the Free State of Prussia
- Rhoda ErdmannGerman biologist (1870–1935)
- Riccardo GiacconiItalian-American astrophysicist (1931–2018)
- Ricci decompositionIn the mathematical fields of Riemannian and pseudo-Riemannian geometry, the Ricci decompo
- Richard AnschützCarl Johann Philipp Noé Richard Anschütz FRSE (Hon) (10 March 1852 – 8 January 1937) was a
- Richard ArkwrightEnglish inventor and entrepreneur (1732–1792)
- Richard Becker (physicist)German physicist (1887–1955)
- Richard BellmanAmerican mathematician (1920–1984)
- Richard DawkinsBritish evolutionary biologist and author (born 1941)
- Richard Dawkins Foundation for Reason and ScienceThe Richard Dawkins Foundation for Reason and Science (RDFRS or RDF) is a division of Cent
- Richard DollBritish physician and epidemiologist (1912–2005)
- Richard E. Bellman Control Heritage AwardThe Richard E. Bellman Control Heritage Award is an annual award (since 1979) given by the
- Richard E. TaylorCanadian physicist (1929–2018)
- Richard Émile Augustin de CandolleRichard Émile Augustin de Candolle (8 December 1868, Walton-on-Thames – 4 May 1920, Vallon
- Richard H. PriceRichard H. Price (born March 1, 1943) is an American physicist specializing in general rel
- Richard Jordan GatlingAmerican inventor (1818–1903)
- Richard K. GuyBritish mathematician (1916–2020)
- Richard M. KarpAmerican mathematician
- Richard M. KrauseRichard Michael Krause (January 4, 1925 – January 6, 2015) was an American physician, micr
- Richard OwenEnglish biologist and palaeontologist (1804–1892)
- Richard StallmanAmerican activist and programmer (born 1953)
- Richard TrevithickBritish inventor and mining engineer (1771–1833)
- Richard TweedieRichard Lewis Tweedie (22 August 1947 – 7 June 2001) was an Australian statistician.
- Richard Wallace (scientist)Richard S. Wallace is an American author of AIML and Botmaster of A.L.I.C.E. (Artificial L
- Richtmyer Memorial AwardThe Richtmyer Memorial Award is an award for physics education, named for physicist Floyd
- Rick L. DanheiserRick L. Danheiser is an American organic chemist and is the Arthur C. Cope Professor of Ch
- Right Livelihood AwardAward for solutions to challenges facing the world
- RigourAdhering absolutely to certain constraints with consistency
- Rim (wheel)The rim is the "outer edge of a wheel, holding the tire". It makes up the outer circular d
- Rio de FlagThe Rio de Flag, which has historically been known as the River de Flag and San Francisco
- Rita Levi-MontalciniItalian neurologist (1909–2012)
- Rita MiljoSouth African conservationist
- Rita R. ColwellAmerican microbiologist (born 1934)
- Robert A. KehoeAmerican toxicologist and lead advocate
- Robert AumannIsraeli-American mathematician (born 1930)
- Robert B. LaughlinAmerican physicist
- Robert Brown (botanist, born 1773)Scottish botanist (1773–1858)
- Robert Brown (botanist, born 1842)Robert Brown (23 March 1842 – 26 October 1895) was a British scientist, explorer, and auth
- Robert Brown GardnerRobert Brown (Robby) Gardner (Tarrytown, New York, February 27, 1939 – May 5, 1998) was an
- Robert BunsenGerman chemist (1811–1899)
- Robert Coleman RichardsonAmerican experimental physicist (1937–2013)
- Robert DewarRobert Berriedale Keith Dewar (21 June 1945 – 30 June 2015) was an American computer scien
- Robert Edwards (physiologist)English physiologist (1925–2013)
- Robert Esnault-PelterieFrench aircraft and rocket pioneer (1881–1957)
- Robert FitzRoyRoyal Navy officer and scientist (1805–1865)
- Robert GalloAmerican biomedical researcher (born 1937)
- Robert HofstadterAmerican physicist (1915–1990)
- Robert Kahn (computer scientist)American Internet pioneer (born 1938)
- Robert Knox (surgeon)Scottish physician, anatomist, geologist and ethnologist (1791–1862)
- Robert LanglandsCanadian mathematician
- Robert MetcalfeAmerican engineer (born 1946)
- Robert MoodyRobert Vaughan Moody, OC FRSC (; born November 28, 1941) is a Canadian mathematician. He i
- Robert S. MullikenAmerican physicist and chemist (1896–1986)
- Robert SerberRobert Serber (March 14, 1909 – June 1, 1997) was an American physicist who participated i
- Robert TriversAmerican biologist (1943–2026)
- Robert W. Wilson (philanthropist)Robert Warne Wilson (November 3, 1926 – December 23, 2013) was an American hedge fund mana
- Robert Whittaker (ecologist)American ecologist (1920–1980)
- Robert Woodrow WilsonAmerican astronomer (born 1936)
- Robin Wall KimmererPotawatomi botanist, educator, and author (born 1953)
- Rockefeller FoundationAmerican philanthropic organization
- Roderick MurchisonBritish geologist (1792–1871)
- Roger Arliner YoungAmerican zoologist
- Roger BéteilleFrench aeronautical engineer (1921–2019)
- Roger GodementRoger Godement (French: ; 1 October 1921 – 21 July 2016) was a French mathematician, known
- Roger GosdenRoger Gordon Gosden (born 23 September 1948) is a British-American physiologist in the fie
- Roger Joseph BoscovichCroat-Italian physicist and writer (1711–1787)
- Roger PenroseEnglish mathematician, mathematical physicist (born 1931)
- Rokhlin's theoremIn 4-dimensional topology, a branch of mathematics, Rokhlin's theorem states that if a smo
- Rolf Maximilian SievertSwedish medical physicist (1896–1966)
- Rolf NiedergerkeRolf Nidergerke (30 April 1921 – 27 December 2011) was a German physiologist and physician
- Roller derbyContact sport on roller skates
- Ronald RossBritish Indian medical doctor and Nobel laureate (1857–1932)
- Rosa BeddingtonEnglish developmental biologist
- Rosa Smith EigenmannAmerican ichthyologist
- Rosalie Slaughter MortonAmerican physician (1876–1968)
- Rosalind Franklin AwardThe Royal Society Rosalind Franklin Award was established in 2003 and is awarded annually
- Rosalyn Sussman YalowAmerican medical physicist (1921–2011)
- Rose Amal21st-century Indonesian-Australian chemical engineer
- Rose Scott-MoncrieffFounder of biochemical genetics
- RoseEmma Mamaa Entsua-MensahGhanaian fisteries scientist and aquatic ecologist
- Rössler attractorThe Rössler attractor () is the attractor for the Rössler system, a system of three non-li
- Roy J. GlauberAmerican theoretical physicist (1925–2018)
- Royal Agricultural Society of EnglandThe Royal Agricultural Society of England (RASE) promotes the scientific development of En
- Royal Canadian Army Medical CorpsThe Royal Canadian Army Medical Corps (RCAMC) was an administrative corps of the Canadian
- Royal InstitutionUK scientific research and education body
- Royal Institution Christmas LecturesAnnual UK Christmas scientific lecture series aimed at children, started 1825
- Royal MedalAward of the Royal Society
- Royal Naval AcademyThe Royal Naval Academy was a facility established in 1733 in Portsmouth Dockyard to train
- Royal Pharmaceutical Society of Great BritainThe Royal Pharmaceutical Society of Great Britain (RPSGB) existed from its founding as the
- Royal Signals and Radar Establishment52°06′00″N 2°18′58″W / 52.100°N 2.316°W
- Royal Society Africa PrizeThe Royal Society Africa Prize (formerly known as the Royal Society Pfizer Prize) has been
- Royal Society Bakerian MedalAward
- Royal Society of ArtsBritish organisation
- Royal Society of EdinburghThe Royal Society of Edinburgh (RSE) is Scotland's national academy of science and letters
- Royal Society of MedicineThe Royal Society of Medicine (RSM) is a medical society based at 1 Wimpole Street, London
- Royal Swedish Academy of SciencesSweden's national academy of sciences
- Royalty paymentForm of payment for use of artistic works or other assets
- Ruby Payne-Scott Medal and LectureThe Ruby Payne-Scott Medal and Lecture for women in science is a distinguished career awar
- Rudolf ClausiusGerman physicist and mathematician (1822–1888)
- Rudolf Ernest LangerRudolf Ernest Langer (8 March 1894 – 11 March 1968) was an American mathematician, known f
- Rudolf LeuckartGerman zoologist (1822–1898)
- Rudolf MössbauerGerman physicist (1929–2011)
- Rudolf TomaschekRudolf Karl Anton Tomaschek (23 December 1895 in Budweis, Bohemia – 8 February 1966, Breit
- Rudolf VirchowGerman doctor and polymath (1821–1902)
- Rudolf WagnerRudolf Friedrich Johann Heinrich Wagner (30 July 1805 – 13 May 1864) was a German anatomis
- Rufus Oldenburger MedalThe Rufus Oldenburger Medal is an award given by the American Society of Mechanical Engine
- Rumford MedalAward by Britain's Royal Society
- Rumigny, ArdennesRumigny (French pronunciation: ) is a commune in the Ardennes department in the Grand Est
- Russell Alan HulseAmerican physicist
- Ruth A. DavidAmerican engineer
- Ruth A. M. Schmidt20th and 21st-century American geologist and paleontologist
- Ruth BunzelAmerican anthropologist
- Ruth CharneyAmerican mathematician
- Ruth D. LechugaMexican anthropologist
- Ruth DayhoffAmerican physician and medical bioinformatician
- Ruth Ella MooreAmerican bacteriologist
- Ruth Fitzmayer SchwarzRuth Fitzmayer Schwarz (July 12, 1925 – August 26, 2004) was an American physicist known f
- Ruth HubbardAustrian-American biochemist (1924–2016)
- Ruth LehmannGerman-American developmental and cell biologist
- Ruth Lyttle SatterAmerican botanist
- Ruth MasonNew Zealand botanist
- Ruth R. BeneritoAmerican scientist and inventor (1916–2013)