“Lamarck's attempt to explain the origin of species”
Source: The Geological Evidences of the Antiquity of Man (1863), Ch.20, p. 391-392
Context: I pointed out in 1832, as the two great flaws in Lamarck's attempt to explain the origin of species, first that he had failed to adduce a single instance of the initiation of a new organ in any species of animal or plant; and secondly, that variation, whether taking place in the course of nature or assisted artificially by the breeder and horticulturist, had never yet gone so far as to produce two races sufficiently remote from each other in physiological constitution as to be sterile when intermarried, or, if fertile, only capable of producing sterile hybrids, &c.
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Charles Lyell 103
British lawyer and geologist 1797–1875Related quotes

Source: The Geological Evidences of the Antiquity of Man (1863), Ch.21, p. 411
Context: Every naturalist admits that there is a general tendency in animals and plants to vary; but it is usually taken for granted, though we have no means of proving the assumption to be true, that there are certain limits beyond which each species cannot pass under any circumstances, or in any number of generations. Mr. Darwin and Mr. Wallace say that the opposite hypothesis, which assumes that every species is capable of varying indefinitely from its original type, is not a whit more arbitrary, and has this manifest claim to be preferred, that it will account for a multitude of phenomena which the ordinary theory is incapable of explaining.

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 125

“It is, of course, much easier to shout, abuse, and howl than to attempt to relate, to explain.”
April Thesis (1917)
Source: Just a Theory: Exploring the Nature of Science (2005), Chapter 2, “Just a Theory: What Scientists Do” (p. 39)

Science and Society: March 2008, ABC Science and Society: Ben Stein Holds Court, 31 March 2008, 2008-04-18 http://blogs.abcnews.com/scienceandsociety/2008/03/index.html,

Source: Darwin’s Black Box: The Biochemical Challenge to Evolution (1996), p. 186