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Who said: “Every body perseveres in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by forces impressed.”
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Home > Dictionary of Science Quotations > Names Index P

Scientist Quotations Index for Initial P

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

A scientist quotation page heading may include a link to a short biography of the scientist or description of the event corresponding to a day in Science History.

David Packard
Heintz Rudolph Pagels
Heinz R. Pagels
Sir James Paget
Christina Pagliarulo
Camille Paglia
Thomas Paine
Paul Painlev�
Abraham Pais
Chuck Palahniuk
William Paley
Bernard Palissy
Pyotr Simon Pallas
Friedrich Adolf Paneth
George N. Papanicolaou
Seymour Papert
Erwin Papperitz
Papyrus
Philippus Aureolus Paracelsus
Bill Parcells
Vilfredo Pareto
Ambroise Par�
Joseph Parker
Theodore Parker
Charles Henry Parkhurst
Cyril Northcote Parkinson
Robert Park
David Parnas
Talcott Parsons
James Riddick (J. R.) Partington
Dolly Parton
James Parton
Blaise Pascal
Victor Paschkis
Leonard M. Passano
Boris Pasternak
Louis Pasteur
Coventry Kersey Dighton Patmore
Mark Pattison
George S. Patton
Aim� Henri Paulian
Ava Helen Pauling
Linus Pauling
Wolfgang Pauli
John Allen Paulos
Jean Paul
Saint Paul
Cesare Pavese
Ivan Petrovich Pavlov
Sir Joseph Paxton
William McGregor Paxton
Cecilia Payne
Roger Payne
Elizabeth Peabody
Thomas Love Peacock
Charles Willson Peale
Rembrandt Peale
Giuseppe Peano
Karl Pearson
Donald Culross Peattie
Jean J. Pedersen
Benjamin Peirce
Charles Sanders Peirce
Aaron Peirsol
Edmund D. Pellegrino
Pierre-Joseph Pelletier
Cesar Pelli
Henry Pemberton
Marzari Giuseppe Pencati
Isaac Penington
Stephen Pennycook
Granville Penn
Robert Penn
Sir Roger Penrose
Arno Penzias
Nikolaos A. Peppas
Samuel Pepys
Daniel Anthony Perasa
Max Percy
Sir William Perkin
Alan J. Perlis
Martin Perl
Claude Perrault
Jean Perrin
Jean Perronet
John Perry
Ralph Barton Perry
Ted Perry
Max Ferdinand Perutz
Johann Pestalozzi
Brenda Peterson
Roger Tory Peterson
James A. Peters
Laurence J. Peter
Jean Antoine Petit-Senn
Francesco Petrarch
Petronius
Henry Petroski
Sir William Petty
Paul Pezoldt
Christoph Heinrich Pfaff
Carl Pfeufer
Gaius Julius Phaedrus
Michael Phelps
Philemon
Erne Philips
Prince Philip Mountbatten
John Phillips
Melba Newell Phillips
Sir Richard Phillips
Eden Phillpotts
Philo
Philolaus
Jean Piaget
�mile Picard
Jean Picard
Pablo Picasso
Auguste Piccard
Edward Charles Pickering
Mary Pickford
Marc-Auguste Pictet
Gerard Piel
James Pierpont
Raymond T. Pierrehumbert
Monseigneur A. J. V. Piette
Sir Alastair Pilkington
Daniel Pinchbeck
Gifford Pinchot
Pindar
Ronald C. Pine
William T. Piper
Sir Brian Pippard
Luigi Pirandello
Norman Wingate Pirie
Baron Clemens von Pirquet
Robert Pirsig
Bartholomeo Pitiscus
Augustus Henry Lane-Fox Pitt-Rivers
Pope Pius XI
Pius XII
George Placzek
James Robinson Planch�
Max Planck
Plato
Robert Platt (Lord Platt of Grindleford)
Plautus
Ian Player
John Playfair
Lyon Playfair
William Playfair
Pliny the Elder
Mark J. Plotkin
Noel-Antoine Pluche
Julius Pl�cker
John Harold Plumb
Plutarch
Pierre Pochet
Edgar Allan Poe
L. Welch Pogue
William Pogue
Frederik Pohl
Henri Poincar�
Louis Poinsot
Sim�on-Denis Poisson
John C. Polanyi
Michael Polanyi
John Charlton Polkinghorne
John Polkinghorne
Robert M. Pollack
Marcus Vitrivius Pollio
Frederick Pollock
Marco Polo
George P�lya
Enrique Jardiel Poncela
Jean-Victor Poncelet
Cyril Ponnamperuma
Charles Poore
Charles Lane Poor
Alexander Pope
Sir William Jackson Pope
Karl Raimund Popper
Antonio Porchia
Matthew Pordage
Cole Porter
Sir George Porter
Noah Porter
Rufus Porter
Sandra Postel
Neil Postman
Ezra Loomis Pound
Colin L. Powell
John Wesley Powell
Lawrence Clark Powell
Richard S. Powers
Llewelyn Powys
John Henry Poynting
Winthrop Praed
Terry Pratchett
Terry Pratchet
Sir William Henry Preece
Chanda Prescod-Weinstein
John Preskill
Frank Press
Richard Preston,
Joseph Prestwich
William Thierry Preyer
Bartholomew Price
Derek J. de Solla Price
Don K. Price
John Boynton (J. B.) Priestley
Joseph Priestley
Ilya Prigogine
Joel R. Primack
Alfred Pringsheim
Jerilynn Prior
Matthew Prior
George Prochaska
Proclus
Protagoras
Marcel Proust
William Prout
African Proverb
American Proverb
Australian Aboriginal Proverb
Chinese Proverb
Crow
English Proverb
German Proverb
Greek Proverb
Gypsy Proverb
Indian Proverb
Iranian Proverb
Irish Proverb
Italian Proverb
Jewish Proverb
Nigerian Proverb
Roumainan Proverb
Scottish Proverb
Spanish Proverb
Turkish Proverb
Welsh Proverb
Sully Prudhomme
Ptolemy
Andy Puddicombe
Emerson M. Pugh
Philip Pullman
Reginald C. Punnett
Michael Idvorsky Pupin
Edward Mills Purcell
Alexander Pushkin
Hilary Putnam
Thomas Pynchon
Pythagoras


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)
Sitewide search within all Today In Science History pages:
Visit our Science and Scientist Quotations index for more Science Quotes from archaeologists, biologists, chemists, geologists, inventors and inventions, mathematicians, physicists, pioneers in medicine, science events and technology.

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- 100 -
Sophie Germain
Gertrude Elion
Ernest Rutherford
James Chadwick
Marcel Proust
William Harvey
Johann Goethe
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


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