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History of Scientific Thought
Important Names
36
Biology
Undergraduate 1
09/11/2012

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Term
the Pre-Socratics
Definition
ca. 600-400 B.C.
1. Thales, Pythagoras, Heraclitus, Empedocles, Leucippus, others
a) Understood objects based on their nature
b) Questioned the origin of all things
c) Identified four elements of all material things – fire, air, earth, water
d) First mechanistic worldview (the atomists)
2. Beginning of fundamental shift in thought
a) Asked new kinds of questions (and sought new answers)
b) Excluded gods from explanations of natural phenomena
c) Defended their theories (critical assessment)
d) Began addressing the problem of knowledge (epistemology)
Term
Plato
Definition
427-348 B.C.
1. Student of Socrates
2. Plato's forms
a) Divine craftsman (Demiurge) created the cosmos
b) Two realms
(1) Forms – perfect idea of everything
(2) Material realm – imperfect replicas
3. Favored reason over observation for establishing knowledge
4. Formulated "geometrical atomism" – mathematics in nature
5. Reintroduced divinity to explain order in the universe
Term
Aristotle
Definition
384-322 B.C.
(for details on sections look at notes)
A. Student and teacher
B. Metaphysics and epistemology
C. Nature and change
D. Cosmology
E. Motion
F. Biology
G. Summary of Aristotle's achievements
Term
Ptolemy
Definition
ca. 87-150 A.D. – lived in Alexandria
1. Almagest
a) Amazing compilation of mathematic models in astronomy
b) retrograde motion (irregular circular planetary movement)
2. Geographia
a) Compiled information on geography
b) Developed latitude, longitude system
Term
Galen
Definition
ca. 129-210 A.D
1. Huge advances in medicine
a) First profession in mending Roman gladiators
b) Exposed him to human anatomy (when human dissection was forbidden)
2. Enjoyed patronage from elite Roman society
a) Allowed him to write hundreds of treatises
b) Practical approach to medicine "acceptable" to Islamic and Christian religions in the coming centuries
c) Retained philosophical foundations of Plato and Aristotle, which were preserved via Galen's medical writing
Term
Pliny the Elder
Definition
ca. 24-79 A.D.
1. Natural History
a) Encyclopedia of everything known of the natural world
b) Compiled from 2000 sources
c) Immense breadth in coverage
d) Written for the general public
2. Another example of information gathering into a single book
Term
Augustine
Definition
354-430 A.D.
1. Science should work in service to Christian theology
2. Anti-astrology because it denied free will and human responsibility
3. His views set the stage for interplay between natural philosophy and Christianity during the Middle Ages
Term
Abu Ali al-Husayn ibn Abdallah ibn Sina
Definition
980-1037
a) Known as “Avicenna” in Latin West
b) Child prodigy (at age 13 began training as a physician)
c) Medical encyclopedist
d) Wrote > 250 works, emphasis on medicine, but very broad interests
Term
Abu Arrayhan Muhammad ibn Ahmad al-Biruni
Definition
973-1048
a) Greatest Islamic natural philosopher
b) Studied vast range of topics, from astronomy to law
c) Calculated radius of Earth (fairly accurately)
Term
Abul-Waleed Muhammad ibn Rushd
Definition
1126-1198a)
a) Known as “Averroes” in Latin West
b) Last great thinker of Islamic Renaissance
c) Known as the Great Commentator
d) Lived in Córdoba, Spain
e) Synthesist, staunch supporter of Aristotelian logic and philosophy
f) Two kinds of truth
(1) Religion (faith-based) – appropriate for commoner
(2) Philosophy (reason-based) – for intellectual elite
(3) Religion and philosophy not at odds; same truth revealed by both
(4) This thinking would greatly influence that of Thomas Aquinas (1225-1274)
Term
Charlemagne
Definition
ca. 742-814
a) Carolingian empire eventually included most of continental western Europe
b) First centralized government since Roman rule
Term
Anselm of Canterbury
Definition
1033-1109
a) "Ontological proof"
b) Proof of God's existence
Term
William of Conches
Definition
died ca. 1154
a) Tried to explain natural phenomena via natural causes (first), then (if needed) divine causes
b) He and fellow "naturalists" blasted by conservative theological thinkers
c) Conservatives viewed philosophical method as challenge to theological method in establishing truth
d) "Naturalists" revitalize interest in astrology, but to explore natural forces linking heaven and Earth
Term
William of Ockham
Definition
ca. 1285-1349
a) Argued the impossibility of determining an object's final cause
b) "Ockham's Razor"
(1) Adding arguments doesn't improve reasoning
(2) When faced with two explanations, the simpler explanation is probably correct
c) Challenged papal authority and was excommunicated
Term
Nicholas Copernicus
Definition
1473-1543
1. Royal Prussian (now called Poland)
2. Heliocentric planetary model
a) Sun at center of planets
b) Conflicted with Aristotelian model
c) This, in turn, conflicted with Christian theology
d) Published heliocentric model begrudgingly on his death bed
e) Changed European thought regarding planetary models
Term
Tycho Brahe
Definition
1546-1601
1. Danish nobleman, self-taught astronomer
2. Built huge observatory, gathered extensive data
3. Retained Earth as center of planetary system
4. Spotted new star
a) Corroborated by academic community
b) One of first times where community agreement affirms knowledge claim
Term
Galileo Galilei
Definition
1564-1642
1. Developed the experimental method (repeated measurements)
2. Combined data gathering and mathematical modeling
3. Promoted data sharing, leading to knowledge development as part of an academic community
4. Made several astronomical discoveries
5. Attacked by the Roman Catholic Church
a) Galileo ordered not to teach Copernican system
b) Judged guilty at Roman Inquisition of 1632
c) Silenced by house arrest for remainder of his life
Term
Johannes Kepler
Definition
1571-1630
1. First true Copernican (heliocentric planetary model)
2. Applied mathematical models to understand planetary motion
3. Poor vision, so became Tycho Brahe's apprentice to gain observations and improve his model of planetary motion
4. After Brahe's death, became Imperial Mathematician of Holy Roman Emperor
5. Posited “magnetic” force of sun, not God, responsible for planetary motion
Term
Sir Francis Bacon
Definition
1561-1626
1. English lawyer by training
2. Concerned with heresy and treason, so distrusted free-thinking
3. Ideas should be controlled by leaders responsible for security
4. Bacon's inductive method
a) Study small parts of
b) nature in controlled settings
c) Data gathered by many observers, then interpreted by intellectual elite
5. Knowledge is power, so understanding nature valuable for practical applications that result from natural philosophy
Term
Rene Descartes
Definition
1596-1650
1. French mathematician and philosopher
2. Skeptic
3. Deductive method (in opposition to Bacon's inductive method)
a) An alternative to Aristotelian philosophical method of deduction
b) Doubt everything, then carefully build universal truths
4. "I think, therefore I am."
Term
Sir Isaac Newton
Definition
1642-1727
1. English astronomer and mathematician
2. The Principia – grand synthesis of physics
a) Combined and extended works of Copernicus, Galileo, and Kepler
b) Universal laws of explaining nature
Term
Robert Boyle
Definition
1627-1691
1."Boyles law" relating pressure and volume of a gas
2. Instruments as objective, unbiased means of measuring natural objects
3. Importance of repeatability adopted by natural philosophers
Term
Denis Diderot
Definition
1713-1784
(1) Encyclopédie (1751) – very ambitious, sought to spread knowledge of everything to educated people
(2) Generated an enormous backlash from the French government and the pope
Term
Antoine-Laurent Lavoisier
Definition
1743-1794
b) Developed concepts of oxygen, water being comprised of oxygen and “inflammable air” (hydrogen)
c) Lavoisier and others reformed chemistry through language via new book (1787) that established the systematic naming of chemicals
d) In Lavoisier’s Elements of Chemistry (1789), he added his methods, standards of measurement, and all elements and compounds named to date
Term
Georges Cuvier
Definition
1769-1832
Catastrophism
in Paris
(1) Extinction due to seven “progressive” floods
(2) Catastrophes local, not tied to biblical flood
(3) History of life progressive
(4) Ideologically fit French view of revolution bringing progress
Term
Charles Lyell
Definition
Uniformitarianism (gradual)
1797-1875 in England
(1) Extinction due to gradual geological changes
(2) Present and past forces similar (Newtonian)
(3) History of life is not progressive; no evolution (inconsistent with fossil evidence)
(4) Ideologically fit British view of societal classes, which did not change and subjugated lower classes
Term
Jean Baptiste de Monet de Lamarck
Definition
1744-1829 in Paris
a) No extinction
b) Species transform into new species
(1) Organisms change during lifetime
(2) Those traits passed on to offspring
c) Not influential
Term
Charles Darwin
Definition
1809-1882 in England
a) Wealthy “gentlemanly” amateur scientist
b) Voyage of the Beagle (1831-1835) influential to his thinking
c) Evolution by natural selection
(1) Organisms with more advantageous traits in an environment survive and pass on those traits to their
(2) offspring; those traits become more common in next generation
(3) Competitive struggle between organisms consistent with contemporary struggles of capitalism and imperialism
(4) Eventually became cornerstone of modern biology
d) Social Darwinism
(1) Applied Darwinian evolution to human races
(2) Reinforced moral authority to segregate and subjugate the “lower” human races
Term
Johann Gregor Mendel
Definition
Heredity
1822-1884 in Austria
1. Bred > 28,000 pea plants, gathered much data on heredity
2. Applied mathematics
3. in tracing patterns of pea traits from one generation to the next
4. Read paper at society meeting (1865); it had very little impact
5. Importance of research not rediscovered until 1900
Term
Robert Koch
Definition
1843-1910
a) Germ theory of disease (1890)
b) Four postulates still used in studying disease today
Term
Louis Pasteur
Definition
1822-1895 in France
a) Experimentally debunked spontaneous generation (living organisms arising from non-living matter)
b) Fermentation due to microorganisms, not chemical reactions
c) Pasteurization: use heat to kill microorganisms
Term
Dmitri Ivanovitch Mendeleev
Definition
1834-1907in Russia
a) Ordered the known elements that scientists were studying
b) Left openings for future elements that were as yet unknown
Term
Albert Einstein
Definition
1879-1955
e=mc2 (1905)
a) Linked major ideas in physics (time, energy, mass, gravity, motion)
b) Overturned Newtonian physics as more generalized model of the universe
Term
Marie Curie
Definition
Radioactivity
1867-1934
(1) First female Nobel winner (won award twice)
(2) First female professor at the Sorbonne (France
Term
James Watson & Francis Crick
Definition
1928 & 1916
(1) “Discovered” the double helix model of DNA
(2) Awarded the Nobel Prize
Term
Rosalind Franklin
Definition
1920-1958 in London
(1) X-ray crystallographer who studied DNA
(2) Her data were shared with Watson and Crick without her permission
(3) Her contributions were not acknowledged by Watson and Crick
(4) She was never awarded a portion of the Nobel Prize because it is not granted posthumously
(5) Watson and Crick’s behavior now viewed as classic case of unethical practice of science
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