Exploremos el ciclo de la roca (Exploring the Rock Cycle)

Learn about the rich history of Mission San Juan Capistranol: how it started, the people who ran it, the indigenous population, and its legacy today.

El acoso a la Iglesia católica es creciente, tanto desde la política como desde los medios de comunicación. Una inteligente y maquiavélica campaña a nivel mundial ha puesto contra las cuerdas y está a punto de enviar a las catacumbas a la institución fundada por Jesucristo. Pero los enemigos de la Iglesia no cuentan con la intervención de fuerzas sobrenaturales que pueden cambiar por completo el desenlace final. Ésta es la trama de esta apasionante novela de misterio, que arranca de una supuesta aparición de la Virgen María en Guatemala y lleva al lector por buena parte del mundo,...

This complete Spanish translation of the highly acclaimed Isaac Asimov's 21st Century Library of the Universe is ideal for students still developing their English-language skills.

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...