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Today in Science History - Quickie Quiz
Who said: “I believe that this Nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to earth.”
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Home > Category Index for Science Quotations > Category Index A

Scientist Quotations - Categories Index for Initial A

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.

A Posteriori (2)
A Priori (26)
Aachen (1)
Aback (1)
Abandon (73)
Abate (2)
Abatement (1)
Abbreviate (2)
Abbreviation (2)
ABC (1)
Abdicate (1)
Abdication (1)
Abdomen (6)
Abe (1)
Abel (1)
Aberdeen (2)
Aberration (10)
Abeunt Studia In Mores (2)
Abhor (8)
Abhorrence (8)
Abide (12)
Abiding (3)
Ability (161)
Abiogenesis (1)
Abjuration (3)
Abl (1)
Ablaze (1)
Able (1)
Abnegation (1)
Abnormal (6)
Abnormality (2)
Abode (2)
Abolish (13)
Abolished (1)
Abolishing (1)
Abolition (1)
Abominable (4)
Abominate (1)
Abomination (2)
Aboriginal (3)
Aborigine (2)
Abortion (4)
Abortive (2)
Abound (17)
Above (7)
Abracadabra (2)
Abraham (1)
Abridge (3)
Abroad (19)
Abrogate (1)
Abrupt (6)
Abscissa (1)
Absence (21)
Absent (3)
Absent-Minded (4)
Absolute (150)
Absolute Temperature (1)
Absolutely (40)
Absoluten (1)
Absoluteness (4)
Absorb (53)
Absorbed (3)
Absorbing (3)
Absorption (13)
Absorption Line (2)
Abstain (7)
Abstemiousness (1)
Abstinence (4)
Abstract (140)
Abstract Algebra (1)
Abstract Mathematics (9)
Abstractedly (1)
Abstraction (48)
Abstractly (1)
Abstractness (2)
Abstruse (11)
Abstrusely (1)
Absurd (60)
Absurdity (33)
Abundance (26)
Abundant (23)
Abundantly (2)
Abuse (25)
Abyss (30)
Academia (4)
Academic (19)
Academic World (1)
Academy (37)
Academy Of Science (Paris) (1)
Academy Of Sciences (4)
Acadia (1)
Accede (1)
Accelerate (11)
Acceleration (12)
Accelerator (11)
Accent (5)
Accentuate (2)
Accentuation (1)
Accept (197)
Acceptable (14)
Acceptance (55)
Accepted (6)
Accepting (22)
Access (21)
Accessibility (3)
Accessible (27)
Accession (2)
Accessory (1)
Accident (92)
Accidental (29)
Accidentally (2)
Acclamation (1)
Acclimatize (1)
Accolade (1)
Accommodate (16)
Accommodation (9)
Accompanied (1)
Accompaniment (1)
Accompany (22)
Accomplice (1)
Accomplishment (101)
Accord (36)
Accordance (10)
According (236)
Accordingly (5)
Accoucheur (1)
Account (195)
Accountable (1)
Accountancy (1)
Accountant (4)
Accounting (1)
Accredit (1)
Accreditation (1)
Accredited (1)
Accretion (5)
Accrual (1)
Accrue (3)
Accruing (1)
Accumulate (30)
Accumulated (2)
Accumulation (50)
Accumulator (1)
Accuracy (81)
Accurate (87)
Accurately (7)
Accursed (1)
Accusation (6)
Accuse (4)
Accused (3)
Accustom (52)
Accustomed (46)
Accustoming (1)
Ace Of Spades (1)
Acetanilide (1)
Acetic Acid (2)
Acetyl-choline (1)
Ache (7)
Achieve (75)
Achieved (2)
Achievement (186)
Achieving (3)
Achilles (2)
Acid (83)
Acid Rain (2)
Acid Test (1)
Acidification (4)
Acknowledge (33)
Acknowledgment (12)
Acme (1)
Acorn (5)
Acoustic (3)
Acoustics (4)
Acquaint (10)
Acquaintance (38)
Acquainted (1)
Acquiesce (2)
Acquiescence (2)
Acquire (45)
Acquired (77)
Acquirement (3)
Acquiring (5)
Acquisition (45)
Acquisitive (2)
Acquite (1)
Acquittal (1)
Acre (13)
Acreage (1)
Acrid (1)
Acrobat (2)
Across (32)
Acrostic (1)
Act (277)
Act Of Faith (4)
Act Of God (1)
Acting (6)
Actinium (1)
Action (340)
Action Potential (1)
Activate (3)
Activation (6)
Active (80)
Actively (3)
Activism (1)
Activity (217)
Actor (8)
Actress (1)
Actual (118)
Actuality (6)
Actualize (1)
Actually (27)
Actuary (2)
Actuate (1)
Actuation (1)
Acuity (3)
Acumen (1)
Acute (8)
Acutely (2)
Acuteness (3)
Ad Infinitum (5)
Ad Nauseam (1)
Adage (4)
Adagio (1)
Adam (7)
Adam And Eve (5)
Adamant (3)
Adams_JohnCouch (1)
Adapt (70)
Adaptability (7)
Adaptable (2)
Adaptation (59)
Adaption (1)
Adaptive (3)
Add (41)
Add-On (1)
Added (1)
Addenda (1)
Adder (3)
Addict (4)
Addiction (6)
Addictive (2)
Adding Machine (1)
Addition (68)
Additional (6)
Additive (2)
Address (13)
Addressed (1)
Adduce (1)
Adenine (6)
Adept (3)
Adequacy (10)
Adequate (50)
Adequately (4)
Adhere (3)
Adhered (1)
Adhereded (1)
Adherence (2)
Adherent (6)
Adhesion (6)
Adhesive (2)
Adiabatic (1)
Adipose (1)
Adirondacks (1)
Adjective (3)
Adjoining (3)
Adjudication (1)
Adjunct (3)
Adjust (11)
Adjustable (2)
Adjustment (21)
Administer (3)
Administration (14)
Administrator (11)
Admirable (19)
Admirably (3)
Admiralty (2)
Admiration (60)
Admire (18)
Admired (1)
Admirer (9)
Admissible (6)
Admission (17)
Admit (48)
Admitted (3)
Admittedly (2)
Admixture (2)
Adolescence (1)
Adolescent (4)
Adopt (22)
Adopting (1)
Adoption (7)
Adoration (4)
Adore (3)
Adorn (1)
Adorned (1)
Adornment (4)
Adrenaline (5)
Adriatic (1)
Adroit (1)
Adroitness (1)
Adulation (1)
Adult (23)
Adulter (1)
Adulterate (1)
Adultery (1)
Adulthood (1)
Adumbration (1)
Advance (297)
Advanced (12)
Advancement (63)
Advantage (140)
Advantage Of Science (1)
Advantageous (10)
Advent (7)
Adventitious (1)
Adventure (68)
Adventurer (3)
Adverb (3)
Adversary (7)
Adverse (3)
Adversity (6)
Advertise (1)
Advertising (9)
Advice (57)
Advisable (1)
Advise (7)
Advisor (3)
Advocate (20)
Aeneid (1)
Aerial (11)
Aernonautics (1)
Aerodynamically (1)
Aerodynamics (1)
Aeronaut (2)
Aeronautically (1)
Aeronautics (15)
Aeroplane (1)
Aerosol (2)
Aerospace Engineering (1)
Aesop's Fable (1)
Aesthete (1)
Aesthetic (48)
Aestheticism (2)
Aesthetics (12)
Aether (13)
Afar (7)
Affability (2)
Affair (29)
Affect (19)
Affectation (4)
Affected (3)
Affection (43)
Affinity (27)
Affirm (3)
Affirmation (8)
Afflict (4)
Affliction (6)
Affluence (3)
Afford (19)
Affordable (1)
Affording (2)
Affront (1)
Aficionado (1)
Afire (1)
Aflame (1)
Afloat (4)
Afoul (1)
Afraid (23)
Afresh (4)
Africa (37)
African (10)
African American (8)
After (1)
After-Life (1)
Afterglow (1)
Afterlife (3)
Aftermath (1)
Afternoon (5)
Afterthought (6)
Afterward (5)
Again (4)
Against (332)
Agamemnon (1)
Agate (2)
Age (506)
Age Of Enlightenment (1)
Age Of Science (2)
Age Of The Earth (12)
Age-Long (1)
Agency (14)
Agenda (4)
Agent (71)
Ages (1)
Agglomerately (1)
Agglomeration (1)
Agglutinin (2)
Aggrandization (1)
Aggrandizement (2)
Aggravate (2)
Aggregate (23)
Aggregation (6)
Aggression (10)
Aggressive (4)
Agincourt (1)
Aging (9)
Agitate (1)
Agitated (1)
Agitation (10)
Agnostic (9)
Agnosticism (2)
Agonizing (3)
Agonizingly (1)
Agony (7)
Agoraphobic (1)
Agree (31)
Agreeable (19)
Agreement (55)
Agricola_Geogius (1)
Agricultural Chemistry (1)
Agriculture (78)
Ahead (21)
Ahmes (1)
Aid (100)
AIDS (3)
Ail (2)
Ailing (1)
Ailment (6)
Aim (175)
Aimless (5)
Aint (4)
Air (366)
Air Conditioned (1)
Air Force (2)
Air Pollution (13)
Air Power (1)
Air Pressure (1)
Air Pump (2)
Air Resistance (2)
Air Travel (1)
Air-Conditioned (1)
Air-Conditioning (1)
Aircraft (9)
Aird_Thomas (1)
Airiness (1)
Airless (3)
Airman (1)
Airplane (43)
Airport (3)
Airship (1)
Airy (2)
Aisle (1)
Ait (1)
Ajar (1)
Akin (5)
Alabaster (1)
Aladdin (2)
Alamogordo (2)
Alarm (19)
Alarming (4)
Alas (2)
Alaska (3)
Albatross (1)
Albumen (2)
Albumin (2)
Albuminoid (1)
Alchemist (23)
Alchemy (31)
Alcohol (22)
Alcoholic (2)
Alcoholism (6)
Alderman (1)
Aldrin_Edward (1)
Alembic (3)
Alert (13)
Alexandria (2)
Alfalfa (1)
Alga (2)
Algae (7)
Algebra (117)
Algebraic (5)
Algebraist (1)
Algeria (1)
Algiers (1)
Algorithm (5)
Algorithmic (1)
Alhabra (1)
Alice (8)
Alice In Wonderland (8)
Alien (35)
Alien Life (1)
Alienate (3)
Alienation (2)
Alight (1)
Alike (60)
Aliment (1)
Alimentary (1)
Alimentary Canal (2)
Aliphatic (1)
Alive (97)
Alkali (6)
Alkaloid (1)
All (1)
All Right (1)
All The Time (4)
All-Embracing (1)
All-Pervading (1)
All-Powerful (2)
All-Seeing (1)
Allah (2)
Allapatric (1)
Allegation (1)
Alleged (2)
Allegedly (1)
Allegiance (5)
Allegory (8)
Allegro (1)
Allen_Gordon (1)
Allergist (1)
Allergy (2)
Alleviate (4)
Alleviations (1)
Alley (2)
Alliance (5)
Allied (2)
Alligator (1)
Allocate (1)
Allocated (2)
Allocation (2)
Allot (1)
Allotment (1)
Allow (51)
Allowable (2)
Allowance (6)
Allowed (3)
Allowing (2)
Alloy (4)
Allure (4)
Allurement (2)
Alluring (5)
Allusion (2)
Alluvial (2)
Ally (7)
Alm (1)
Almighty (23)
Almond (2)
Almost (1)
Almshouse (1)
Almsman (1)
Aloft (5)
Alone (322)
Aloofness (1)
Aloud (1)
Alp (9)
Alpaca (1)
Alpha Centauri (2)
Alpha Particle (5)
Alpha Particle Scattering (1)
Alpha Ray (4)
Alphabet (14)
Alphabetical (1)
AlphonseX (1)
Alpine (2)
Alps (9)
Already (226)
Alright (1)
Altar (11)
Alter (64)
Alteration (31)
Altered (32)
Altering (3)
Alternate (3)
Alternating Current (5)
Alternation (5)
Alternative (30)
Alternative Energy (2)
Altitude (5)
Altogether (9)
Altruism (7)
Altruist (1)
Altruistic (1)
Alum (1)
Alumina (1)
Aluminum (15)
Aluminum Can (1)
Always (7)
Alzheimers (1)
Amalgam (1)
Amalgamation (1)
Amass (6)
Amassed (2)
Amateur (22)
Amaze (5)
Amazed (4)
Amazement (19)
Amazing (35)
Amazon (11)
Amber (3)
Ambidextrously (1)
Ambiguity (17)
Ambiguous (14)
Ambition (46)
Ambitious (4)
Ambivalent (2)
Ambrosia (1)
Ambulatory (1)
Ambuscade (2)
Amelioratation (1)
Ameliorate (2)
Amen (4)
Amenable (4)
Amendment (2)
Amends (1)
Amenity (1)
America (142)
American (54)
American Physical Society (1)
American Revolution (1)
Americium (1)
Amiable (10)
Amicable (1)
Amid (2)
Amide (1)
Amidst (2)
Amine (2)
Amino Acid (12)
Amino Acids (1)
AminoAcid (1)
Ammonia (15)
Ammonite (1)
Ammonius (1)
Ammunition (2)
Amniocentesis (1)
Amnion (1)
Amo Amas Amat (1)
Amoeba (21)
Among (3)
Amoral (1)
Amorphous (6)
Amount (152)
Amounting (1)
Amp (1)
Ampere_AndreMarie (1)
Amphibian (7)
Amphibious (1)
Amphitheatre (2)
Ample (4)
Amplification (3)
Amplified (6)
Amplifier (3)
Amplify (1)
Amplitude (4)
Ampulla (1)
Amputation (2)
Amsterdam (1)
Amulet (1)
Amuse (2)
Amused (3)
Amusement (37)
Amusing (2)
Amyotrophic (1)
Anachronistic (1)
Anaerobic (1)
Anaesthesia (4)
Anaesthetic (2)
Anal (1)
Analaysis (2)
Analgesic (1)
Analog (4)
Analogous (7)
Analogue (7)
Analogy (76)
Analyse (4)
Analysis (243)
Analysis Of Variance (1)
Analyst (8)
Analytic (11)
Analytic Function (1)
Analytic Geometry (1)
Analytical Chemist (2)
Analytical Chemistry (3)
Analytical Engine (5)
Analytical Theory (1)
Analyze (11)
Anarchic (1)
Anarchism (1)
Anarchy (8)
Anathema (2)
Anatomical (3)
Anatomist (24)
Anatomize (1)
Anatomy (73)
Anaylsis (1)
Ancestor (62)
Ancestral (1)
Ancestral Law (1)
Ancestry (13)
Anchor (10)
Ancienne (1)
Ancient (197)
Ancient Egypt (4)
Ancient Greece (1)
Ancient Master (1)
Ancient Roman (1)
Ancient Rome (1)
Ancient World (3)
And-Summative (1)
Andante (1)
Anderson_Hans (1)
Andes (2)
Andipodes (1)
Andiron (1)
Andreas (1)
Andrew (1)
Andromeda (2)
Anecdote (21)
Anemia (4)
Anesthesia (5)
Anesthesiologist (1)
Anesthetic (4)
Aneurysm (1)
Anew (18)
Angel (46)
Angeles (4)
Anger (20)
Angina (1)
Angle (25)
Anglerfish (1)
Anglerfishes (1)
Anglesey (1)
Angling (3)
Anglo-Dane (1)
Anglo-Danish (1)
Anglo-Saxon (2)
Angry (10)
Angst (2)
Anguish (2)
Angular (1)
Angularity (1)
Anilide (1)
Aniline (2)
Anima Mundi (1)
Animal (643)
Animal Behavior (10)
Animal Cell (2)
Animal Experiment (1)
Animal Husbandry (1)
Animal Kingdom (21)
Animal Life (20)
Animalcule (12)
Animate (8)
Animated (5)
Animating (1)
Animation (6)
Anion (3)
Ankle (1)
Anna (1)
Annal (3)
Annals (1)
Annihilate (10)
Annihilation (15)
Announce (13)
Announcement (15)
Announcer (1)
Annoy (4)
Annoyance (4)
Annoyed (1)
Annual (5)
Annuity (1)
Annul (2)
Anode (4)
Anodyne (1)
Anoint (1)
Anomalous (1)
Anomaly (11)
Anonymity (1)
Anonymously (1)
Anorexia (1)
Anorexia Nervosa (1)
Another (7)
Answer (388)
Ant (33)
Antagonism (6)
Antagonist (1)
Antagonistic (3)
Antarctic (7)
Antarctica (8)
Antecedent (5)
Antediluvian (5)
Antenna (5)
Anterior (4)
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Anthrolopology (1)
Anthropocene (1)
Anthropocentric (2)
Anthropocentric Theory (1)
Anthropogenic (1)
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Anthropoid (9)
Anthropolgy (2)
Anthropological (2)
Anthropologist (8)
Anthropology (61)
Anthropomorphic (4)
Anthropomorphism (1)
Anthropopithecus (1)
Anti-Castro (1)
Anti-evolutionist (2)
Anti-Intellectual (2)
Anti-Intellectualism (1)
Anti-Matter (4)
Anti-Scientific (1)
Anti-Semite (1)
Anti-Vivisectionist (1)
Antiabortionists (1)
Antibiotic (2)
Antibody (6)
Antichrist (1)
Anticipate (20)
Anticipated (1)
Anticipation (18)
Anticlimactic (1)
Antidote (9)
Antiessentialist (1)
Antigen (5)
Antimatter (4)
Antimony (7)
Antiparticle (4)
Antipathy (2)
Antipeople (1)
Antiphysics (1)
Antipodes (3)
Antiquarian (2)
Antiquary (4)
Antiquated (3)
Antique (3)
Antiquity (33)
Antiself (1)
Antiseptic (8)
Antiserum (1)
Antithesis (7)
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Anymore (5)
Anyone (38)
Anything (9)
Anyway (3)
Anywhere (16)
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Apart (7)
Apartment (4)
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Apathy (4)
Ape (54)
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Aphid (2)
Aphorism (22)
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Apparatus (70)
Apparent (85)
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Appear (122)
Appearance (144)
Appeared (4)
Appearing (1)
Appease (6)
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Appending (1)
Appendix (5)
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Appetite (20)
Appetizing (1)
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Apple (45)
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Apple-Leaves (1)
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Applicabile (1)
Applicability (7)
Applicable (31)
Application (256)
Applicative (1)
Applied (176)
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Applied Science (36)
Apply (167)
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Appolonius (1)
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Appropriate (61)
Appropriateness (7)
Appropriation (5)
Approval (12)
Approve (6)
Approximate (25)
Approximately (1)
Approximation (32)
April (9)
Apron (2)
Apropriateness (1)
Apt (9)
Aptitude (19)
Aqua Fortis (1)
Aqua-Lung (1)
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Aquarium (2)
Aquatic (5)
Aqueduct (4)
Aqueous (8)
Aquifer (3)
Aquired (1)
Aquisition (1)
Arab (5)
Arabesque (1)
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Arabian Nights (1)
Arabic (4)
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Arbitrariness (1)
Arbitrary (26)
Arbitrator (1)
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Archaeology (51)
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Archipelago (7)
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Ardor (5)
Arduous (3)
Are You Kidding (1)
Area (33)
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Arent (6)
Argon (3)
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Arguably (1)
Argue (25)
Argument (144)
Argumentation (1)
Argumentative (1)
Arid (6)
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Aright (3)
Arise (160)
Arising (22)
Aristarchos (1)
Aristocracy (6)
Aristocrat (3)
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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
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- 90 -
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- 80 -
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- 70 -
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- 60 -
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- 50 -
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- 40 -
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- 30 -
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- 20 -
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- 10 -
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