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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 > Category Index for Science Quotations > Category Index S > Category: Sterility

Sterility Quotes (5 quotes)

It need scarcely be pointed out that with such a mechanism complete isolation of portion of a species should result relatively rapidly in specific differentiation, and one that is not necessarily adaptive. The effective inter­group competition leading to adaptive advance may be between species rather than races. Such isolation is doubtless usually geographic in character at the outset but may be clinched by the development of hybrid sterility. The usual difference of the chromosome complements of related species puts the importance of chromosome aberration as an evolutionary process beyond question, but, as I see it, this importance is not in the character differences which they bring (slight in balanced types), but rather in leading to the sterility of hybrids and thus making permanent the isolation of two groups.
How far do the observations of actual species and their subdivisions conform to this picture? This is naturally too large a subject for more than a few suggestions.
That evolution involves non-adaptive differentiation to a large extent at the subspecies and even the species level is indicated by the kinds of differences by which such groups are actually distinguished by systematics. It is only at the subfamily and family levels that clear-cut adaptive differences become the rule. The principal evolutionary mechanism in the origin of species must thus be an essentially nonadaptive one.
In Proceedings of the Sixth International Congress of Genetics: Ithaca, New York, 1932 (1932) Vol. 1, 363-364.
Science quotes on:  |  Adaptation (49)  |  Differentiation (18)  |  Evolution (535)  |  Geography (27)  |  Hybrid (12)  |  Isolation (26)  |  Race (104)  |  Species (221)

Laboratory and discovery are related terms. Do away with laboratories, and the physical sciences will be become the image of the sterility of death.
Laboratoires et découvertes sont des termes corrélatifs. Supprimez les laboratoires, les sciences physiques deviendront l’image de la stérilité et de la mort.
In article 'The Budget of Science', Revue des Cours Scientifiques (1 Feb 1868) and published as a pamphlet, Some Reflections on Science in France. As translated in Patrice Debré and Elborg Forster (trans.), Louis Pasteur (2000), 143. Original French quote in René Vallery-Radot, La Vie de Pasteur (1900), 215. Note: Pasteur was fighting for a new laboratory building, but funding had been withdrawn—yet many millions were being spent to build an opera house. The full article, which was scorching, had been first sent to the newspaper, Moniteur in early Jan 1868, but it was declined as too politically controversial. Napoleon III was notified, and he was sympathetic. Other translations include: “Laboratories and discoveries are correlative terms. If you suppress laboratories, physical science will become stricken with barrenness and death.” In René Vallery-Radot and Mrs R. L. Devonshire (trans.) The Life of Pasteur (1902), 199.
Science quotes on:  |  Death (302)  |  Discovery (680)  |  Image (59)  |  Laboratory (132)  |  Physical Science (66)  |  Related (5)

The advance of science is not comparable to the changes of a city, where old edifices are pitilessly torn down to give place to new, but to the continuous evolution of zoologic types which develop ceaselessly and end by becoming unrecognisable to the common sight, but where an expert eye finds always traces of the prior work of the centuries past. One must not think then that the old-fashioned theories have been sterile and vain.
The Value of Science (1905), in The Foundations of Science: Science and Hypothesis, The Value of Science, Science and Method(1946), trans. by George Bruce Halsted, 208.
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To fall back, to live on oneself, to withdraw is sterility. Communication with the exterior means fertility.
As quoted in The Artist (1978), 93, 5.
Science quotes on:  |  Communication (76)  |  Exterior (6)  |  Fertility (15)  |  Withdraw (9)

To isolate mathematics from the practical demands of the sciences is to invite the sterility of a cow shut away from the bulls.
As quoted, without citation, in In J.E. Littlewood, A Mathematician’s Miscellany (1953), , reissued as Béla Bollobás (ed.), Littlewood’s Miscellany (1986).
Science quotes on:  |  Bull (3)  |  Cow (30)  |  Demand (76)  |  Invite (9)  |  Isolate (22)  |  Mathematics (1205)  |  Practical (133)  |  Science (2067)

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)

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