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Who said: “As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.”
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Home > Category Index for Science Quotations > Category Index F

Scientist Quotations - Categories Index for Initial F

This list includes science quotes from archaeologists, biologists, chemists, geologists, inventors and inventions, mathematicians, physicists plus pioneers in medicine, science events and technology.

This index gives quotes listed under category headings. When the category is a scientist name, the index is for any reference made ABOUT the scientist BY another person.

Fable (12)
Fabric (27)
Fabricate (6)
Fabrication (2)
Fabulous (1)
Facade (2)
Face (214)
Face Of The Earth (5)
Face Of The World (1)
Face To Face (3)
Faced (1)
Facet (9)
Facetious (2)
Facetiousness (1)
Facile (4)
Facilitate (5)
Facilitation (2)
Facility (13)
Facing (1)
Facsimile (1)
Fact (1250)
Fact-Finding (1)
Factfinder (1)
Faction (4)
Factitious (1)
Factor (46)
Factorize (1)
Factory (20)
Facts (553)
Factual (8)
Factuality (2)
Faculty (76)
Fad (10)
Faddist (1)
Fade (11)
Faded (1)
Fading (3)
Fahrenheit (1)
Fail (190)
Failed (3)
Failing (5)
Failure (173)
Fain (1)
Faint (10)
Faintness (1)
Fair (16)
Fairly (4)
Fairness (2)
Fairy (9)
Fairy Lights (1)
Fairy Story (2)
Fairy Tale (7)
Fairy Tales (1)
Fairyland (1)
Fairytale (1)
Faith (209)
Faith School (1)
Faithful (13)
Faithfully (3)
Faithfulness (1)
Fake (3)
Fakery (1)
Falacy (1)
Falcon (2)
Falkland Islands (1)
Fall (242)
Fall Apart (1)
Fall Down (1)
Fall Of Man (1)
Fall Off (1)
Fallability (3)
Fallacious (13)
Fallacy (31)
Fallen (2)
Fallibility (4)
Fallible (6)
Falling (6)
Fallout (2)
False (105)
False Teeth (1)
Falsehood (28)
Falsely (2)
Falsifiable (1)
Falsification (11)
Falsified (1)
Falsify (3)
Falsity (16)
Falstaff (2)
Falter (1)
Faltering (2)
Fame (51)
Famed (1)
Familial (1)
Familiar (46)
Familiarity (21)
Familiarization (2)
Familiarize (5)
Familiarly (1)
Family (101)
Family Counselor (1)
Family Doctor (1)
Famine (17)
Famous (11)
Fan (3)
Fanatic (7)
Fanatical (3)
Fanaticism (1)
Fance (1)
Fanciful (6)
Fancy (50)
Fane (1)
Fang (1)
Fanny (1)
Fantasize (1)
Fantastic (21)
Fantasy (15)
Far (155)
Far And Near (1)
Far-Fetched (1)
Far-Reaching (9)
Far-Seeing (3)
Far-Sightedness (1)
Farad (1)
Farce (5)
Fare (5)
Farm (28)
Farmer (35)
Farming (8)
Farmland (2)
Farrago (1)
Farther (51)
Farthest (1)
Farthing (1)
Fascinate (12)
Fascinated (2)
Fascinating (38)
Fascination (34)
Fascism (4)
Fascist (1)
Fashion (34)
Fashionable (15)
Fashioned (1)
Fashioning (2)
Fast (48)
Fast-Moving (1)
Fasten (1)
Fastening (2)
Faster (50)
Fastest (1)
Fastidious (2)
Fasting (3)
Fat (11)
Fatal (14)
Fatalism (2)
Fatality (3)
Fatally (1)
Fate (76)
Fateful (2)
Father (113)
Father Christmas (1)
Father Of Geology (1)
Father Time (1)
Fatherhood (2)
Fathom (15)
Fathomable (1)
Fathomless (3)
Fatigue (13)
Fatiguing (1)
Fatten (1)
Fatter (1)
Fatty (1)
Fatuity (1)
Fatuous (2)
Faucet (1)
Fault (57)
Faulty (3)
Fauna (13)
Faustian (2)
Faustus (1)
Favor (69)
Favorabilty (1)
Favorable (24)
Favored (5)
Favorite (37)
Favourability (1)
Favourable (3)
Favourite (6)
Fax (1)
Fear (211)
Fearful (7)
Fearless (7)
Fearlessly (1)
Fearlessness (1)
Fearsome (1)
Feasibility (4)
Feasible (3)
Feast (5)
Feat (10)
Feather (12)
Feature (49)
Featureless (1)
February (1)
Fecund (2)
Fecundity (1)
Fed And Watered (1)
Federal (6)
Federal Government (1)
Fee (9)
Feeble (28)
Feed (31)
Feedback (10)
Feeding (7)
Feel (369)
Feel Good (1)
Feel Sorry (4)
Feeler (3)
Feeling (259)
Feelingly (1)
Feelings (52)
Feet (5)
Feign (1)
Feigning (1)
Feigns (1)
Felicitous (1)
Felicity (4)
Fell (2)
Felled (1)
Felling (2)
Fellow (88)
Fellow Citizen (1)
Fellow Men (1)
Fellow-Beings (1)
Fellow-Man (1)
Fellowship (2)
Felt (1)
Female (50)
Feminine (4)
Feminist (3)
Femur (1)
Fence (11)
Fencer (2)
Fend (1)
Feral (1)
Fermat Theorem (1)
Fermat's Last Theorem (3)
Ferment (5)
Fermentation (15)
Fermented (1)
Fermilab (1)
Fermium (1)
Fern (10)
Ferocious (1)
Ferret (1)
Ferris Wheel (1)
Ferry (4)
Ferryboat (1)
Fertile (30)
Fertiliser (1)
Fertility (23)
Fertilization (15)
Fertilize (4)
Fertilized (2)
Fertilizer (13)
Fervent (6)
Fervid (2)
Fervidly (1)
Fervor (8)
Fester (1)
Festival (2)
Festivity (1)
Festoon (3)
Fetching (1)
Fetid (1)
Fetter (4)
Fetters (7)
Fetus (2)
Feudal (1)
Feudalism (1)
Fever (33)
Feverish (6)
Fevour (1)
Few (15)
Fewer (11)
Fewest (5)
Fez (1)
Fiasco (2)
Fiat (7)
Fibber (1)
Fiber (16)
Fiber Bundle (1)
Fibers (2)
Fibre (6)
Fibrescope (1)
Fibrin (1)
Fickle (1)
Ficticious (1)
Fiction (22)
Fictional (1)
Fictitious (1)
Fiddle (1)
Fidelity (1)
Fidget (1)
Fidgeting (1)
Fie (1)
Field (377)
Field Naturalist (3)
Field Study (1)
Field Theory (1)
Field Trip (2)
Field Work (2)
Field-Mice (1)
Field-Work (1)
Fieldwork (3)
Fiend (1)
Fierce (8)
Fiercely (1)
Fiery (5)
Fifteen (1)
Fifteenth Century (1)
Fifth (3)
Fifty (17)
Fig (1)
Fight (47)
Fight Or Flight (1)
Fight. (1)
Fighter (3)
Fighter Jet (1)
Fighting (2)
Figment (1)
Figuration (1)
Figurative (1)
Figure (162)
Figure Out (7)
Filament (4)
File (6)
Filed Out (1)
Filial (1)
Filiation (1)
Filing (1)
Filing Cabinet (1)
Filing Clerk (1)
Filings (1)
Fill (66)
Filld (1)
Filled (3)
Filling (6)
Film (11)
Film Set (1)
Filming (3)
Filter (10)
Filth (4)
Filthy (2)
Fin (4)
Final (121)
Finalism (1)
Finality (8)
Finally (26)
Finance (4)
Financial (5)
Financial Science (1)
Financier (1)
Finch (4)
Find (1009)
Find Out (25)
Finding (32)
Finding Out (5)
Findings (6)
Fine (34)
Fine Art (1)
Finely (3)
Finest (3)
Finger (48)
Fingernail (1)
Fingers (1)
Finicky (1)
Finish (61)
Finished (4)
Finite (60)
Finnegan's Wake (1)
Fir (2)
Fire (201)
Fire Hazard (1)
Fire-Alarm (1)
Firearm (1)
Fireball (3)
Firefly (7)
Fireman (1)
Fireplace (2)
Firewood (2)
Firework (2)
Firing (1)
Firm (47)
Firmament (18)
Firmly (6)
Firmness (1)
First (1300)
First Hand (2)
First Law Of Motion (3)
First Rate (1)
First Sight (6)
First Step (3)
First Time (14)
First World (1)
First-Born (1)
First-Class (2)
First-Generation (1)
First-Rate (2)
Firsthand (2)
Fischer_Ronald (2)
Fish (128)
Fish Farming (2)
Fisherman (9)
Fishery (3)
Fishing (20)
Fishwife (1)
Fission (10)
Fist (3)
Fistful (1)
Fistula (1)
Fit (138)
Fit In (1)
Fitful (2)
Fitfully (2)
Fitness (9)
Fitted (2)
Fittest (1)
Fitting (1)
Fiught (1)
Five (16)
Five Senses (1)
Fix (30)
Fixable (1)
Fixate (1)
Fixation (5)
Fixed (17)
Fixed Air (2)
Fixed Point (1)
Fixing (2)
Fixity (1)
Fixture (2)
Fizeau_Hippolyte (1)
Fizzle (1)
Flabbergast (2)
Flabbergasting (1)
Flag (11)
Flair (1)
Flake (7)
Flambeau (1)
Flame (44)
Flame Of Life (1)
Flamingo (2)
Flammability (1)
Flammable (1)
Flap (2)
Flare (1)
Flash (49)
Flashback (1)
Flashlight (1)
Flask (1)
Flat (33)
Flat Earth (3)
Flatland (1)
Flato (1)
Flatten (1)
Flatter (1)
Flattering (1)
Flatters (1)
Flattery (7)
Flatulence (1)
Flatworm (1)
Flaunt (1)
Flavor (7)
Flaw (18)
Flawed (2)
Flawless (1)
Flea (11)
Fleck (2)
Fledged (1)
Flee (9)
Fleece (2)
Fleet (4)
Fleeting (3)
Flesh (28)
Flexibility (6)
Flexible (7)
Flexing (1)
Flicker (2)
Flier (1)
Flight (101)
Flimsy (2)
Fling (5)
Flinging (1)
Flint (7)
Flip (1)
Flippant (1)
Flipping (1)
Flit (1)
Float (31)
Floatation (1)
Floating (4)
Flock (4)
Floe (3)
Flog (1)
Flood (52)
Flood Control (2)
Floodlight (2)
Floor (21)
Floppy Disk (1)
Flora (9)
Florence (2)
Florescence (1)
Florida (2)
Flotsam (2)
Flour (4)
Flourish (34)
Flourished (1)
Flourishing (6)
Flow (89)
Flower (110)
Flowering (2)
Flowery (1)
Flowing (1)
Fluctuate (1)
Fluctuating (1)
Fluctuation (15)
Flue (1)
Fluent (2)
Fluently (1)
Fluffy (1)
Fluid (53)
Fluid Dynamics (1)
Fluid Mechanics (1)
Fluid Motion (2)
Fluke (1)
Fluorescence (3)
Fluoresence (1)
Fluorine (5)
Flush (1)
Flux (21)
Fluxion (7)
Fluxions (2)
Fly (153)
Fly Back (1)
Fly-Catcher (1)
Flyer (1)
Flying (73)
Flying Machine (13)
Flying Saucer (3)
Flyover (1)
Flywheel (2)
Foam (3)
Focal (1)
Focal Length (2)
Focal Point (1)
Focus (36)
Focused (2)
Fodder (1)
Foe (11)
Foetus (5)
Fog (10)
Foggy (1)
Foible (2)
Foil (3)
Foiled (2)
Fol_Hermann (1)
Fold (9)
Folding (1)
Foliage (6)
Folio (1)
Folk (10)
Folklore (2)
Folksong (1)
Follicle (1)
Follow (387)
Follower (11)
Following (16)
Folly (44)
Foment (1)
Fond (13)
Fonda_Jane (1)
Fondle (1)
Fondly (1)
Fondness (7)
Font (1)
Food (211)
Food Analysis (1)
Food Chain (7)
Food Science (1)
Food Security (7)
Food Web (8)
Foodstuff (1)
Fool (121)
Fool's Gold (1)
Fooled (1)
Foolery (1)
Foolhardiness (1)
Foolhardy (1)
Fooling (1)
Foolish (41)
Foolishness (10)
Foolproof (5)
Foot (64)
Foot-Print (1)
Football (11)
Foothill (3)
Foothold (2)
Footing (2)
Footless (1)
Footnote (5)
Footpath (1)
Footprint (16)
Footstep (5)
Footsteps (1)
Footstool (2)
Fop (1)
Foppery (1)
Forager (1)
Forbearance (3)
Forbid (14)
Forbidden (18)
Forbidding (1)
Force (495)
Force And Matter (3)
Force Of Nature (9)
Forced (3)
Forceful (1)
Forceps (2)
Forces (1)
Forcing (2)
Ford (1)
Forebear (1)
Forecast (15)
Forecaster (1)
Forefather (4)
Forefront (2)
Forego (4)
Foregoing (2)
Foreground (3)
Forehead (3)
Foreign (45)
Foreign Policy (2)
Foreign Trade (1)
Foreigner (3)
Foreigness (1)
Foreignn (1)
Foreleg (1)
Foreman (1)
Foremost (11)
Forensic (1)
Forerunner (4)
Foresee (22)
Foreseeable (3)
Foreseeing (1)
Foreshadow (5)
Foresight (8)
Foresighted (1)
Forest (161)
Forest Fire (1)
Forest Management (2)
Forestall (1)
Forester (4)
Forestry (17)
Foretell (12)
Foretelling (4)
Forever (111)
Forfeit (2)
Forge (10)
Forgery (3)
Forget (125)
Forget-Me-Not (1)
Forgetfulness (8)
Forgeting (2)
Forgetting (13)
Forgive (12)
Forgiveness (2)
Forgo (4)
Forgotten (53)
Fork (2)
Forlorn (5)
Form (974)
Formal (37)
Formalism (7)
Formalist (1)
Formality (1)
Formalize (1)
Formalized (1)
Formaniniferae (1)
Format (1)
Formation (100)
Formative (2)
Formeation (1)
Formed (5)
Former (138)
Formerly (5)
Formic Acid (1)
Formicidae (1)
Formidable (8)
Forming (42)
Formless (4)
Formula (101)
Formulate (16)
Formulation (37)
Fornication (1)
Forsake (4)
Forsaken (1)
Forsaking (1)
Forsight (1)
Forsythia (1)
Fort (2)
Forte (3)
Forth (14)
Forth Bridge (1)
Forthcoming (1)
Forthright (1)
Forthwith (2)
Forties (1)
Fortification (6)
Fortify (4)
Fortitude (2)
Fortnight (3)
Fortran (3)
Fortress (4)
Fortuitous (11)
Fortuity (1)
Fortunate (30)
Fortunately (9)
Fortune (50)
Fortune Teller (1)
Fortune-Teller (1)
Forty (4)
Forty-Nine (2)
Forty-Three (1)
Forum (1)
Forunately (1)
Forward (104)
Fossil (143)
Fossil Fuel (8)
Fossil Hunting (1)
Fossil Record (12)
Fossil_Fuel (1)
Fossilization (1)
Fossils (1)
Foster (12)
Fostering (4)
Foul (15)
Foulness (1)
Found (11)
Foundation (177)
Founded (22)
Founder (26)
Foundering (2)
Founding (5)
Foundry (1)
Fount (1)
Fountain (18)
Fountain Of Eternal Youth (1)
Fountainhead (1)
Four (6)
Four-Dimensional (1)
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Fourier (5)
Fourier Analysis (1)
Fourier Series (2)
Fourteen (2)
Fourth (8)
Fourth Dimension (3)
Fourwheeler (1)
Fowl (6)
Fowler (1)
Fox (9)
Fox-glove (1)
Fracassato_Carolo (1)
Fractal (11)
Fraction (16)
Fractional Distillation (1)
Fracture (7)
Fragile (26)
Fragility (2)
Fragment (58)
Fragmentary (8)
Fragmented (2)
Fragrance (1)
Fragrant (1)
Frail (2)
Frailities (1)
Frailty (1)
Frame (26)
Frame Of Mind (3)
Frame Of Reference (5)
Framer (1)
Framework (33)
Framing (2)
Franc (1)
France (29)
Francis (2)
Francium (2)
Frank (4)
Frankenstein (3)
Franklin (1)
Frankly (1)
Frankness (1)
Franks (1)
Frantic (3)
Frasier_James (1)
Fraternity (4)
Frau (1)
Fraud (15)
Fraught (1)
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Frayed (2)
Freak (6)
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Free (237)
Free Fall (2)
Free Hand (1)
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Free Wifi (1)
Free Will (15)
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Freely (13)
Freeman (1)
Freemen (1)
Freethinking (2)
Freeway (1)
Freeze (6)
Freezing (16)
Freezing Point (3)
Frege_Friedrich (1)
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French (21)
French Academy Of Sciences (2)
Frenchman (4)
Frenetically (1)
Frenzy (6)
Frequency (25)
Frequent (26)
Frequently (21)
Fresco (1)
Fresh (69)
Fresh Air (1)
Freshen (2)
Freshest (1)
Freshman (3)
Freshness (8)
Freshwater (3)
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Freudian (4)
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Friday (1)
Friedmann Solution (1)
Friend (176)
Friendly (7)
Friendship (18)
Friendship 7 (3)
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Frivolity (2)
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Frog (42)
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From The Earliest Times (2)
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Fruit (107)
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Fruitful (61)
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Fuegian (1)
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Full (67)
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Full Stop (1)
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Fuller_Thomas(1710-1790) (1)
Fullerene (4)
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Fullfill (1)
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Fume (7)
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Fun (42)
Function (233)
Functional (10)
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Fund (19)
Fundamental (263)
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Fur (7)
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Furnace (13)
Furnish (97)
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Further (6)
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Fusion (16)
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Futile (12)
Futility (7)
Future (464)
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Fuxion (1)
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Fuzzy (5)


Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
Quotations by:Albert EinsteinIsaac NewtonLord KelvinCharles DarwinSrinivasa RamanujanCarl SaganFlorence NightingaleThomas EdisonAristotleMarie CurieBenjamin FranklinWinston ChurchillGalileo GalileiSigmund FreudRobert BunsenLouis PasteurTheodore RooseveltAbraham LincolnRonald ReaganLeonardo DaVinciMichio KakuKarl PopperJohann GoetheRobert OppenheimerCharles Kettering  ... (more people)

Quotations about:Atomic  BombBiologyChemistryDeforestationEngineeringAnatomyAstronomyBacteriaBiochemistryBotanyConservationDinosaurEnvironmentFractalGeneticsGeologyHistory of ScienceInventionJupiterKnowledgeLoveMathematicsMeasurementMedicineNatural ResourceOrganic ChemistryPhysicsPhysicianQuantum TheoryResearchScience and ArtTeacherTechnologyUniverseVolcanoVirusWind PowerWomen ScientistsX-RaysYouthZoology  ... (more topics)
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John Keynes
Carl Gauss
Paul Feyerabend
- 90 -
Antoine Lavoisier
Lise Meitner
Charles Babbage
Ibn Khaldun
Euclid
Ralph Emerson
Robert Bunsen
Frederick Banting
Andre Ampere
Winston Churchill
- 80 -
John Locke
Bronislaw Malinowski
Bible
Thomas Huxley
Alessandro Volta
Erwin Schrodinger
Wilhelm Roentgen
Louis Pasteur
Bertrand Russell
Jean Lamarck
- 70 -
Samuel Morse
John Wheeler
Nicolaus Copernicus
Robert Fulton
Pierre Laplace
Humphry Davy
Thomas Edison
Lord Kelvin
Theodore Roosevelt
Carolus Linnaeus
- 60 -
Francis Galton
Linus Pauling
Immanuel Kant
Martin Fischer
Robert Boyle
Karl Popper
Paul Dirac
Avicenna
James Watson
William Shakespeare
- 50 -
Stephen Hawking
Niels Bohr
Nikola Tesla
Rachel Carson
Max Planck
Henry Adams
Richard Dawkins
Werner Heisenberg
Alfred Wegener
John Dalton
- 40 -
Pierre Fermat
Edward Wilson
Johannes Kepler
Gustave Eiffel
Giordano Bruno
JJ Thomson
Thomas Kuhn
Leonardo DaVinci
Archimedes
David Hume
- 30 -
Andreas Vesalius
Rudolf Virchow
Richard Feynman
James Hutton
Alexander Fleming
Emile Durkheim
Benjamin Franklin
Robert Oppenheimer
Robert Hooke
Charles Kettering
- 20 -
Carl Sagan
James Maxwell
Marie Curie
Rene Descartes
Francis Crick
Hippocrates
Michael Faraday
Srinivasa Ramanujan
Francis Bacon
Galileo Galilei
- 10 -
Aristotle
John Watson
Rosalind Franklin
Michio Kaku
Isaac Asimov
Charles Darwin
Sigmund Freud
Albert Einstein
Florence Nightingale
Isaac Newton


by Ian Ellis
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