Con 22 anos, Darwin inicio un viaje a bordo del barco del capitan Fitz-Roy, el Beagle. Dicho viaje alrededor del mundo duro 5 anos. Este viaje para Darwin fue el origen de su conocida teoria observando y analizando la evolucion de las distintas especies de la Tierra. Publicado en 1839, este libro escrito en forma de diario incluye sus avatares durante el viaje y sus anotaciones cientificas sobre la flora, fauna y geologia que estudio.
Con 22 anos, Darwin inicio un viaje a bordo del barco del capitan Fitz-Roy, el Beagle. Dicho viaje alrededor del mundo duro 5 anos. Este viaje para Da...
La teoria de Darwin de la evolucion se basa en hechos clave y e inferencias extraidas de los mismos, que el biologo Ernst Mayr resumio como sigue: Cada especie es suficientemente fertil para que si sobreviven todos los descendientes para reproducir la poblacion crecera. Aunque hay fluctuaciones periodicas, las poblaciones siguen siendo aproximadamente del mismo tamano. Los recursos como los alimentos son limitados y son relativamente estables en el tiempo. Sobreviene una lucha por la supervivencia. Los individuos de una poblacion varian considerablemente de unos a otros. Gran parte de esta...
La teoria de Darwin de la evolucion se basa en hechos clave y e inferencias extraidas de los mismos, que el biologo Ernst Mayr resumio como sigue: Cad...
It is generally agreed that the new-style presidency is the key institution of the French Fifth Republic in that it helps to ensure the stability and effectiveness of the political system--something that France has been seeking since the Revolution of 1789.
Yet, paradoxically, no comprehensive study of the French presidential phenomenon exists. The accumulated experience of 1959-1991, extending over the terms of de Gaulle, Pompidou, Giscard d'Estaing, and Mitterrand, begs a comparative study of their institutional and personal roles in the political process.
Among the...
It is generally agreed that the new-style presidency is the key institution of the French Fifth Republic in that it helps to ensure the stability a...
Darwin's book introduced the scientific theory that populations evolve over the course of generations through a process of natural selection. It presented a body of evidence that the diversity of life arose by common descent through a branching pattern of evolution. Darwin included evidence that he had gathered on the Beagle expedition in the 1830s and his subsequent findings from research, correspondence, and experimentation.
Darwin's book introduced the scientific theory that populations evolve over the course of generations through a process of natural selection. It prese...
Dans cet ouvrage de Charles Darwin, publie le 24 novembre 1859, Charles Darwin explique le mecanisme presidant, selon lui, a l'evolution graduelle des especes vivantes dans la nature. Malgre son titre, cet ouvrage est considere aujourd'hui comme fondateur de la theorie de l'evolution moderne. Darwin mentionne differents predecesseurs, a la fois concernant l'idee de descendance avec modification et l'idee de selection naturelle."
Dans cet ouvrage de Charles Darwin, publie le 24 novembre 1859, Charles Darwin explique le mecanisme presidant, selon lui, a l'evolution graduelle des...
The daring and restless mind, the integrity and simplicity of Darwin's character are revealed in this direct and personal account of his life-his family, his education, his explorations of the natural world, his religion and philosophy.
The daring and restless mind, the integrity and simplicity of Darwin's character are revealed in this direct and personal account of his life-his fami...
Although in some respects more technical in their subjects and style thanDarwin's "Journal," the books here reprinted will never lose their valueand interest for the originality of the observations they contain. Manyparts of them are admirably adapted for giving an insight into problemsregarding the structure and changes of the earth's surface, and in factthey form a charming introduction to physical geology and physiography intheir application to special domains.
Although in some respects more technical in their subjects and style thanDarwin's "Journal," the books here reprinted will never lose their valueand i...
