TODAY IN SCIENCE HISTORY ®  •  TODAYINSCI ®
Celebrating 24 Years on the Web
Find science on or your birthday

Today in Science History - Quickie Quiz
Who said: “Science without religion is lame; religion without science is blind.”
more quiz questions >>
Home > Category Index for Science Quotations > Category Index L > Category: Life Cycle

Life Cycle Quotes (5 quotes)

Abroad, energy efficiency was a respectable form of engineering. Whereas Americans largely purchased by least “first cost,” Europeans understood and operated under the concept of “life cycle cost.”
An early insight at a 1974 summer study at Princeton, on efficient use of energy, with experts in buildings, industry, transportation, and utilities. In 'The Art of Energy Efficiency: Protecting the Environment with Better Technology', Annual Review of Energy and the Environment (Nov 1999), 24, 37.
Science quotes on:  |  America (143)  |  Concept (242)  |  Cost (94)  |  Energy Efficiency (7)  |  Engineering (188)  |  Europe (50)  |  First (1302)  |  Least (75)  |  Operate (19)  |  Respectable (8)  |  Understand (648)

It was to Hofmeister, working as a young man, an amateur and enthusiast, in the early morning hours of summer months, before business, at Leipzig in the years before 1851, that the vision first appeared of a common type of Life-Cycle, running through Mosses and Ferns to Gymnosperms and Flowering Plants, linking the whole series in one scheme of reproduction and life-history.
(1919). As quoted in E.J.H. Corner, The Life of Plants (1964).
Science quotes on:  |  Amateur (22)  |  Business (156)  |  Common (447)  |  Cycle (42)  |  Early (196)  |  Enthusiast (9)  |  Fern (10)  |  First (1302)  |  Flower (112)  |  History (716)  |  Wilhelm Hofmeister (2)  |  Hour (192)  |  Life (1870)  |  Life History (2)  |  Linking (8)  |  Man (2252)  |  Month (91)  |  Morning (98)  |  Moss (14)  |  Plant (320)  |  Reproduction (74)  |  Running (61)  |  Scheme (62)  |  Series (153)  |  Summer (56)  |  Through (846)  |  Type (171)  |  Vision (127)  |  Whole (756)  |  Year (963)  |  Young (253)

Life is inseparable from water. For all terrestrial animals, including birds, the inescapable need for maintaining an adequate state of hydration in a hostile, desiccating environment is a central persistent constraint which exerts a sustained selective pressure on every aspect of the life cycle. It has been said, with some justification, that the struggle for existence is a struggle for free energy for doing physiological work. It can be said with equal justification for terrestrial organisms that the struggle for existence is a struggle to maintain an aqueous internal environment in which energy transformations for doing work can take place.
In 'The water economy of seed-eating birds that survive without drinking', Proceedings of the International Ornithological Congress (1972), 15, 237-238.
Science quotes on:  |  Adequate (50)  |  Animal (651)  |  Aqueous (8)  |  Aspect (129)  |  Bird (163)  |  Central (81)  |  Constraint (13)  |  Cycle (42)  |  Doing (277)  |  Energy (373)  |  Environment (239)  |  Equal (88)  |  Exert (40)  |  Existence (481)  |  Free (239)  |  Hostile (8)  |  Include (93)  |  Inescapable (7)  |  Inseparable (18)  |  Internal (69)  |  Justification (52)  |  Life (1870)  |  Maintain (105)  |  Need (320)  |  Organism (231)  |  Persistent (18)  |  Physiological (64)  |  Place (192)  |  Pressure (69)  |  Say (989)  |  Selective (21)  |  State (505)  |  Struggle (111)  |  Sustain (52)  |  Terrestrial (62)  |  Transformation (72)  |  Water (503)  |  Work (1402)

Researchers keep identifying new species, but they have no idea about the life cycle of a given species or its other hosts. They cut open an animal and find a new species. Where did it come from? What effect does it have on its host? What is its next host? They don't know and they don't have time to find out, because there are too many other species waiting to be discovered and described.
Talk at Columbia University, 'The Power of Parasites.'
Science quotes on:  |  Animal (651)  |  Cut (116)  |  Cycle (42)  |  Discover (571)  |  Discovery (837)  |  Dissection (35)  |  Effect (414)  |  Find (1014)  |  Host (16)  |  Idea (881)  |  Know (1538)  |  Life (1870)  |  New (1273)  |  Next (238)  |  Open (277)  |  Other (2233)  |  Researcher (36)  |  Species (435)  |  Time (1911)  |  Waiting (42)

We are just beginning to understand how molecular reaction systems have found a way to “organize themselves”. We know that processes of this nature ultimately led to the life cycle, and that (for the time being?) Man with his central nervous system, i.e. his memory, his mind, and his soul, stands at the end of this development and feels compelled to understand this development. For this purpose he must penetrate into the smallest units of time and space, which also requires new ideas to make these familiar concepts from physics of service in understanding what has, right into our century, appeared to be beyond the confines of space and time.
Answering “Where Now?” as the conclusion of his Nobel Lecture (11 Dec 1967) on 'Immeasurably Fast Reactions', published in Nobel Lectures, Chemistry 1963-1970 (1972).
Science quotes on:  |  Beginning (312)  |  Being (1276)  |  Beyond (316)  |  Central (81)  |  Century (319)  |  Concept (242)  |  Confine (26)  |  Cycle (42)  |  Development (441)  |  End (603)  |  Familiar (47)  |  Feel (371)  |  Idea (881)  |  Know (1538)  |  Life (1870)  |  Man (2252)  |  Memory (144)  |  Mind (1377)  |  Molecule (185)  |  Must (1525)  |  Nature (2017)  |  Nervous System (35)  |  New (1273)  |  Organize (33)  |  Penetrate (68)  |  Physic (515)  |  Physics (564)  |  Process (439)  |  Purpose (336)  |  Reaction (106)  |  Require (229)  |  Right (473)  |  Service (110)  |  Small (489)  |  Soul (235)  |  Space (523)  |  Space And Time (38)  |  Stand (284)  |  System (545)  |  Themselves (433)  |  Time (1911)  |  Time And Space (39)  |  Ultimately (56)  |  Understand (648)  |  Understanding (527)  |  Unit (36)  |  Way (1214)


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.

Names index: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Categories index: | 1 | 2 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Thank you for sharing.
- 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


by Ian Ellis
who invites your feedback
Thank you for sharing.
Today in Science History
Sign up for Newsletter
with quiz, quotes and more.