Search results for "Darwin"
showing 10 items of 96 documents
1909-1910: La 'conversione' di Morgan al modello dell'ereditarietà indiretta.
2010
Omaggio a Charles Darwin: 1809-2009: duecento anni di evoluzionismo
Contribution to the reconstruction of geological evolution of the metamorphic basement of the Cordillera Darwin, Tierra del Fuego, Chile.
2008
The crystalline pre-Andine basement outcrops only in the Cordillera Darwin (Tierra del Fuego) in the extreme southern part of Andean belt. It is located between the Antarctic, Nazca and Scotia Plate. Cordillera Darwin breaks the long ophiolitic belt constituted by the Sarmiento Complex and Rocas Verdes; many authors agree that the present setting is the result of the Andean orogenesis, that yielded to the closure of a Jurassic marginal basin (now represented by ophiolites) with its overlying sequence of rhyolitic volcanic and volcanoclastic rocks, now represented by the Tobifera Formation and metamorphism during Cretaceous (Cunningham, 1995 and references). The studied rocks, sampled by A.D…
Ethidium bromide: a fast fluorescent staining procedure for the detection of symbiotic partnership of flagellates and prokaryotes
1999
The hindgut of 'lower' termites harbors a dense population of flagellates and bacteria. The flagellates possess ecto- and endosymbiotic prokaryotes. Most of them are hardly visible in the phase contrast microscope. Staining with the DNA-intercalating agent ethidium bromide visualizes the nuclei of the flagellates as well as the ecto- and endosymbiotic bacteria as red objects. Furthermore, it is possible to distinguish between endosymbiotic methanogens and other bacteria. Following UV excitation, the blue-green autofluorescence of the methanogenic bacteria eclipses the red fluorescence light of the intercalated ethidium bromide. The dye facilitates the observation of symbiotic bacteria and h…
Evolutionary biology and beliefs : how ideology can draw different social stances from science
2016
Agreeing that there are often strong connections between fields of science and the ideological convictions of those producing the science, this essay shows that the connections are often complex and rarely straightforward. Taking the example of evolutionary biology, by looking at three key figures ? Herbert Spencer, Charles Darwin and Alfred Russel Wallace ? it is shown how very different social beliefs can lead to very different social conclusions being drawn from one?s science. It is argued that this message should be kept firmly in mind by those who today would draw social conclusions from science, for instance suggesting that Darwinian evolutionary biology leads straight to the social p…
Charles Darwin and ideology : rethinking the Darwinian revolution
2016
This short paper critiques the idea of any coherent Darwinian ideology. Charles Darwin himself did not adopt any obvious ideology, except perhaps that of anti-slavery. However, his published work, and that of other evolutionists, led to the emergence of social Darwinism. Herbert Spencer’s role in fostering social Darwinism, and the rise of eugenics, are briefly described. The connection, if any, between the historical figure of Darwin and the social movement that bears his name is discussed. While Darwin’s On the origin of species or The descent of man can hardly account for all the racial stereotyping, nationalism, or political bigotry seen in the half century after his death, there can be…
Homo Natura. Autoregolazione e caos nel pensiero di Nietzsche
2005
Evolution education in natural history museums
2009
During 2009, scientists around the world will celebrate the 200th anniversary of the birth of Charles Darwin, the father of the theory of evolution, and the 150th anniversary of the publication of his main thesis, On the Origin of Species by Means of Natural Selection. Today, the theory of evolution is considered to be one of the greatest milestones in the history of science. Despite its undisputed merit in science, there seems to be constant turmoil around the theory in the public, which might be related to the incomplete understanding of the basic principles of evolution [1,2].
Repercussions of Evolutionism in the Spanish Natural History Society
2001
In 1871, during the markedly libe ral environment created by the Sexennial Revolution (1868-1874), the Spanish Natural History Society (SEHN) was founded) It was established at the instigation of an active group of naturalists whose primary objectives were to promote the study of Natural History in Spain, discuss the most relevant problems relating to this discipline, and have a vehicle through which to publish their work. This early initiative was highly successful, with the number of members in the first three decades fluctuating between 290-300 and, in some years, exceeding four hundred. University professors and teachers from the Faculties of Science, Medicine and Pharmacy; researchers …
Should the teaching of biological evolution include the origin of life?
2010
The development of mainstream research on the origin of life as an outcome of Darwinian evolution is discussed. It is argued that prebiotic evolution and the origin of life should not be excluded from the syllabus and should be part of classes on biological evolution, and that the transition from non-living to living matter is best understood when seen as part of evolutionary biology. The wide acceptance of evolutionary approaches to the study of the emergence of life in European and Latin American countries is discussed.
1993
We have pointed out that the history of the giraffe’s neck served as an example to explain the theoretical concepts of transformism, proposed by J.-B. Lamarck, and of Darwin’s natural selection. However, at that time it had not been substantiated by palaeontological data. Since then, the record has furnished a number of fossils which enable us to reconstruct the major trends in the evolution of the giraffides of Africa, Asia, and Europe [1,2, 3] (Fig. 16.1; Appendix 16.1).