Proceedings of the National Academy of Sciences

Microbial methane and the end-Permian extinction A study finds that the catastrophic end-Permian extinction event may have been related to the evolution of a new microbial mechanism to convert organic carbon to methane, an ability catalyzed by an abundance of nickel resulting from Siberian volcanism. Oxytocin might enhance group-serving lying In an experiment where participants could benefit their group by lying, 60 participants who received oxytocin lied to a greater extent and more readily than 60 participants who did not, but when lying benefitted only the individual, those who received oxytocin did not lie any more than those who did not receive oxytocin, suggesting that oxytocin might influence people to act in the best interest of their group, even if the actions include dishonesty, according to a study.

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qué es nódulo materialista ¿qué es nódulo materialista? La asociación nódulo materialista, que no persigue fines especulativos ni lucrativos, tiene como objeto principal fomentar las relaciones entre quienes estén interesados en el materialismo filosófico. Para ello promoverá la realización, organización y desarrollo de cuantas actividades e iniciativas puedan contribuir al desarrollo, estudio y cultivo del saber y el conocimiento. Journal home : Nature Raphael Lis, Charles C. Karrasch, Michael G. Poulos, Balvir Kunar, David Redmond, Jose G. Barcia Duran, Chaitanya R. Lectures - World’s Top Scientists Posted on Thursday June 18, 2009 by Staff Writers By Sarah Russel Unless you’re enrolled at one of the best online colleges or are an elite member of the science and engineering inner circle, you’re probably left out of most of the exciting research explored by the world’s greatest scientists. But thanks to the Internet and the generosity of many universities and online colleges, you’ve now got access to the cutting edge theories and projects that are changing the world in this list below. If you’re looking for even more amazing lectures, check out our updated list for 2012 with more talks from great minds.

Style Repository Here you can find Citation Style Language 1.0.1 citation styles for use with Zotero and other CSL 1.0.1–compatible software. For more information on using CSL styles with Zotero, see the Zotero wiki . 2,790 styles found: El Mundo de Ultratumba: las diferentes visiones del arte En la casa de subastas Sotheby´s se inauguró una exposición única inspirada en la ‘Divina Comedia’ de Dante Alighieri. El poema épico se manifiesta como un prisma a través del cual se examinan los diferentes puntos de vista del arte desde los tiempos antiguos hasta nuestros días sobre el mundo de ultratumba. Siguiendo al gran ciudadano de Florencia, los visitantes de la muestra pueden viajar al infierno, purgatorio y paraíso en los que está dividida la misma. Están expuestas unas 80 obras de arte moderno y antiguo, pinturas y esculturas de artistas de los siglos XV-XVIII, del arte europeo del siglo XIX, pinturas de estilo moderno y surrealista, obras de latinoamericanos y diseño del siglo XX. Los responsables de la casa de subastas y los propios pintores leen fragmentos de la ‘Divina Comedia’ y realizan comentarios sobre las obras expuestas en el vídeo de introducción que se proyecta. Dante Alighieri ‘La Divina Comedia’, Infierno, Canto III:

Teach the Earth Finding Visuals, Classroom Activities, Course Descriptions and People Undergraduate Introductory Geoscience Courses, Upper Level Geoscience Courses, Two-Year Colleges, and K-12 Classrooms Strengthening Your Teaching Research on Teaching and Learning | Designing Courses | Assessment | Teaching Large Classes | Quantitative Thinking | Teaching in the Field | Teaching with Current Research and Data Popular Topics The DART-Europe E-theses Portal DART-Europe is a partnership of research libraries and library consortia who are working together to improve global access to European research theses. DART-Europe is endorsed by LIBER (Ligue des Bibliothèques Européennes de Recherche), and it is the European Working Group of the Networked Digital Library of Theses and Dissertations (NDLTD). The DART-Europe partners help to provide researchers with a single European Portal for the discovery of Electronic Theses and Dissertations (ETDs), and they participate in advocacy to influence future European e-theses developments. DART-Europe offers partners a European networking forum on ETD issues, and may provide the opportunity to submit collaborative funding applications to achieve DART-Europe's vision for ETDs.

¿Son compatibles el capitalismo y la democracia? a estabilidad social y económica bajo el capitalismo afronta dos problemas esenciales. Por un lado, las continuas crisis y la feroz competencia inter-capitalista hacen de la acumulación de capital un proceso inseguro. Por el otro, el conflicto en la distribución del ingreso constituye una permanente amenaza de ruptura social.