This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Algunas tejen sus nidos con la seda más fina, otras tienen esclavos que obedecen órdenes, otras son guerreras feroces, otras son vagas y viajan a lomo de sus compañeras, e incluso están las que funcionan como barriles de alimento. Las hormigas están en todos lados, desde el Ecuador hasta el trópico, desde el nivel del mar hasta las montañas, desde los túneles hasta las cocinas. Hay muchísimas y trabajan... como hormigas (se calcula que un solo nido puede cortar el área de pasto equivalente a una cancha de fútbol por día). Viven en nuestro planeta desde hace más de 100 millones de años y tienen mucho para enseñarnos: su organización social, el valor de la agricultura, de la ganadería, de los antibióticos y del control biológico de plagas. Sus nidos son una verdadera sociedad organizada: una monarquía con una reina y muchísimas obreras que garantizan la supervivencia de la colonia.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Liburu honen helburua Popperren eta Kuhnen zientzi razionaltasunari buruzko planteamenduak aztertzea da. Bi filosofo hauen ikusmoldeen arteko gatazka 60 eta 70eko hamarkadetan gauzatu zen. Popperrek eskaintzen duen razionaltasun ereduak zientziaren xedea egiazko teoria azalkorren burutzapen gisa definitzen du, eta teoria lehiakideen aukeraketan erabili ahal izateko normatiba edo arautegia proposatzen du. Kuhnen iritziz, zientzi jarduera eta, bereziki, zientzi aldakuntzaren fenomenoa ezin da, Popperren ikusmoldearen kasuan bezala, zientzi teoriaren barneko aldagaien bidez erabat 'razionalki', teoriaren barneko faktoreen bidez soilik azaldu.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Miquel Àngel Cuevas Diarte, especialista en cristal·lografia i mineralogia, presenta un fascinant recorregut través dun fil conductor: la simetria. Lautor no sols posa en relleu lequivalència, la proporció, lharmonia i la bellesa dels objectes simètrics, sinó que interrelaciona disciplines tan variades com la cristal·lografia, la mineralogia, la química, la física, les matemàtiques i la biologia, i també la pintura, la música, larquitectura i lornamentació. Amb una decidida voluntat divulgativa, Cuevas Diarte desenvolupa els conceptes clau de la simetria i en remarca el valor analitzant elements de la vida quotidiana com ara els miralls, els fàrmacs, lunivers, lADN, el cos humà, les plantes, les paraules o els edificis. Un passeig tan divertit com il·lustratiu que ens permet aprofundir en el coneixement de lentorn.
¿Estamos al borde de una nueva edad oscura de irracionalismo y superstición? En este libro conmovedor el incomparable Carl Sagan demuestra con brillantez que el pensamiento científico es necesario para salvaguardar nuestras instituciones democráticas y nuestra civilización técnica. El mundo y sus demonios es el libro más personal de Sagan, y está lleno de historias humanas entrañables y reveladoras. El autor, con las experiencias de su propia infancia y la apasionante historia de los descubrimientos de la ciencia, muestra cómo el método del pensamiento racional puede superar prejuicios y supersticiones para dejar al descubierto la verdad, que, con frecuencia, resulta sorprendente.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
En Universo sin fin se resumen algunas de las profecías del fin del mundo que se han arriesgado a poner fechas concretas para tan magno acontecimiento. ¿Cuándo y cómo se acabará el mundo? ¿A qué se refieren exactamente quienes usan esa expresión? ¿Están pensando en la extinción del universo, de las estrellas y las galaxias, o se refieren a la desaparición de la Tierra, de la vida, o de la especie humana? Lo cierto es que el fin del mundo es una noción que impregna una cultura popular influida por profetas, visionarios, gurús, apariciones de extraterrestres, premoniciones de vírgenes o santos, o por la percepción de una humanidad en continua degeneración. Y sin embargo nada hay más indefinido y arbitrario que esta idea, hasta el punto de que es difícil encontrar otro concepto más aborrecible para una mentalidad racionalista. Cayetano López describe el escenario más verosímil de evolución del Universo, a partir de los conocimientos científicos actuales, examinando las condiciones iniciales y combinándolas con las leyes físicas que rigen su dinámica.
Su doble condición de escritor y de científico permite a Asimov una privilegiada perspectiva acerca de los problemas del género, su historia, su evolución, sus grandes obras y autores, su verosimilitud, el rigor de sus hipótesis, la relación con el cine, las principales revistas, su capacidad de predicción, sus convenciones, las peculiaridades y claves de los aficionados... Imprescindible para amantes de la ciencia ficción, pero también muy útil para entender un fenómeno sociológico.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Algunas tejen sus nidos con la seda más fina, otras tienen esclavos que obedecen órdenes, otras son guerreras feroces, otras son vagas y viajan a lomo de sus compañeras, e incluso están las que funcionan como barriles de alimento. Las hormigas están en todos lados, desde el Ecuador hasta el trópico, desde el nivel del mar hasta las montañas, desde los túneles hasta las cocinas. Hay muchísimas y trabajan... como hormigas (se calcula que un solo nido puede cortar el área de pasto equivalente a una cancha de fútbol por día). Viven en nuestro planeta desde hace más de 100 millones de años y tienen mucho para enseñarnos: su organización social, el valor de la agricultura, de la ganadería, de los antibióticos y del control biológico de plagas. Sus nidos son una verdadera sociedad organizada: una monarquía con una reina y muchísimas obreras que garantizan la supervivencia de la colonia.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Liburu honen helburua Popperren eta Kuhnen zientzi razionaltasunari buruzko planteamenduak aztertzea da. Bi filosofo hauen ikusmoldeen arteko gatazka 60 eta 70eko hamarkadetan gauzatu zen. Popperrek eskaintzen duen razionaltasun ereduak zientziaren xedea egiazko teoria azalkorren burutzapen gisa definitzen du, eta teoria lehiakideen aukeraketan erabili ahal izateko normatiba edo arautegia proposatzen du. Kuhnen iritziz, zientzi jarduera eta, bereziki, zientzi aldakuntzaren fenomenoa ezin da, Popperren ikusmoldearen kasuan bezala, zientzi teoriaren barneko aldagaien bidez erabat 'razionalki', teoriaren barneko faktoreen bidez soilik azaldu.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Miquel Àngel Cuevas Diarte, especialista en cristal·lografia i mineralogia, presenta un fascinant recorregut través dun fil conductor: la simetria. Lautor no sols posa en relleu lequivalència, la proporció, lharmonia i la bellesa dels objectes simètrics, sinó que interrelaciona disciplines tan variades com la cristal·lografia, la mineralogia, la química, la física, les matemàtiques i la biologia, i també la pintura, la música, larquitectura i lornamentació. Amb una decidida voluntat divulgativa, Cuevas Diarte desenvolupa els conceptes clau de la simetria i en remarca el valor analitzant elements de la vida quotidiana com ara els miralls, els fàrmacs, lunivers, lADN, el cos humà, les plantes, les paraules o els edificis. Un passeig tan divertit com il·lustratiu que ens permet aprofundir en el coneixement de lentorn.
¿Estamos al borde de una nueva edad oscura de irracionalismo y superstición? En este libro conmovedor el incomparable Carl Sagan demuestra con brillantez que el pensamiento científico es necesario para salvaguardar nuestras instituciones democráticas y nuestra civilización técnica. El mundo y sus demonios es el libro más personal de Sagan, y está lleno de historias humanas entrañables y reveladoras. El autor, con las experiencias de su propia infancia y la apasionante historia de los descubrimientos de la ciencia, muestra cómo el método del pensamiento racional puede superar prejuicios y supersticiones para dejar al descubierto la verdad, que, con frecuencia, resulta sorprendente.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
En Universo sin fin se resumen algunas de las profecías del fin del mundo que se han arriesgado a poner fechas concretas para tan magno acontecimiento. ¿Cuándo y cómo se acabará el mundo? ¿A qué se refieren exactamente quienes usan esa expresión? ¿Están pensando en la extinción del universo, de las estrellas y las galaxias, o se refieren a la desaparición de la Tierra, de la vida, o de la especie humana? Lo cierto es que el fin del mundo es una noción que impregna una cultura popular influida por profetas, visionarios, gurús, apariciones de extraterrestres, premoniciones de vírgenes o santos, o por la percepción de una humanidad en continua degeneración. Y sin embargo nada hay más indefinido y arbitrario que esta idea, hasta el punto de que es difícil encontrar otro concepto más aborrecible para una mentalidad racionalista. Cayetano López describe el escenario más verosímil de evolución del Universo, a partir de los conocimientos científicos actuales, examinando las condiciones iniciales y combinándolas con las leyes físicas que rigen su dinámica.
Su doble condición de escritor y de científico permite a Asimov una privilegiada perspectiva acerca de los problemas del género, su historia, su evolución, sus grandes obras y autores, su verosimilitud, el rigor de sus hipótesis, la relación con el cine, las principales revistas, su capacidad de predicción, sus convenciones, las peculiaridades y claves de los aficionados... Imprescindible para amantes de la ciencia ficción, pero también muy útil para entender un fenómeno sociológico.