Un espía llamado Sara

As they say, necessity is the mother of invention, and this book introduces readers to 14 women who invented very useful, helpful items. They include Chicago native Margaret Wilcox who invented the car heater, Indiana native Marion O'Brien Donovan who invented disposable diapers, Pennsylvania native Stephanie Kwolek who invented Kevlar, and Austria-born actress Hedy Lamar whose secret communications systems led to the creation of WiFi, Bluetooth, and GPS.

The greatest thinkers of humanity at your fingertips, in minutes! If you thought you would never be able to understand the essential classic authors, you were wrong! With our "Selected Summaries" collection, you will understand the main ideas of the most important thinkers in a very short time and with little effort. The present volume covers the central axes of this discipline. Among them, the reader will find an analysis of the following: A Journey Through The Economy Of Our Time, History Of The Economy, The Culture Of Satisfaction, A Better Society, among others.

Terremotos y tsunamis is one book in the Spanish-language Gran Atlas de la Ciencia series that covers today's most popular science topics, from digital TV to microchips to touchscreens and beyond. Perennial subjects in earth science, life science, and physical science are all explored in detail. Amazing graphics--more than 1,000 per title--combined with concise summaries help students understand complex subjects. Correlated to the science curriculum in grades 5-9, each title also contains a glossary with full definitions for vocabulary.

¡Obtén todo lo que necesitas saber para entrar en el reino espiritual de la comprensión de los milagros! ¿Qué es un milagro? El diccionario define la palabra "milagro" como un evento extraordinario, inusual o sobrenatural que manifiesta la intervención divina en los asuntos de los hombres. Cuando ocurren milagros, las leyes de la naturaleza se rompen y un ser superior está trabajando. Este ser superior es a lo que la mayoría de la gente generalmente se refiere como Dios. Algunos milagros se atribuyen a hacedores de milagros, santos o incluso líderes religiosos porque se cree que Dios ...