Crisis energética: El futuro de los combustibles fósiles (Energy Crisis: The Future of Fossil Fuels)

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...

Esta historia empieza una mañana de esas en que te aburres más que Spiderman en un descampado. Sabes de lo que te hablo, ¿verdad? Parece mentira que el día comenzara así... ¡y acabara con una de las aventuras más épicas de mi vida! Todo fue muy rápido: ver a ese desconocido entrar en su base secreta, colarme tras él sin ser visto... ¡e inventarme el reto de sobrevivir allí sin que me descubra! ¡A tope de pócimas de invisibilidad! ¡Venga escondites aquí y allá! En el momento me pareció divertido, pero nunca podría haber imaginado la montaña rusa de locuras que se me venía...

One of the skills employers want most in new hires is the ability to speak well. Public speaking can not only advance a person in almost any career but can also help an individual do better in school as well. Following the English Language Arts standards for Speaking and Listening, this book teaches readers why public speaking can be such an effective tool, how to craft a powerful speech, and how to overcome one of the most common problems people have with talking in front of a crowd�stage fright.

A collection of words that turn into phrases, phrases that form verses, verses that make songs and songs that tell of adventures, jokes and mischief.

Practice nonstandard measurement at the zoo! This exciting, Spanish-translated title encourages readers to practice measuring their favorite zoo animals, such as elephants, giraffes, pandas, and more. A gorilla weighs the same as three men! When a cheetah runs, its stride length is the length of three men! An elephant weighs the same as three pickup trucks! Vivid images, fun practice questions, early STEM themes, and helpful mathematical diagrams make nonstandard measurement entertaining and easy for children to understand.