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...

[English] Explains many different ways that children can be good citizens and show good citizenship. [Spanish] Ser ciudadano de un país es algo muy especial. Los buenos ciudadanos están orgullosos de sus acciones y defienden sus principios. ¿Cómo somos buenos ciudadanos?

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these fast dinosaurs face-to-face: The Gallimimus could outrun a sandstorm! The Struthiomimus may have been the fastest dinosaur. It could run up to 60 miles per hour! The Liaraptor ran until it took off into the air! These may have...

Aquí encontrarás los mejores chistes, que te harán reír durante horas y con los que serás el rey de la fiesta. ¿Sabes qué es exactamente un segundo? ¡Pues el tiempo imprescindible para contar un chiste corto y que todos tus amigos pasen horas llorando de risa! ¿Qué tienen en común un autobús de jubilados, un niño faquir y dos vacas locas? ¡Pues que están todos dentro de este libro! Aprovecha los silencios incómodos para demostrar tus dotes de humorista y convertirte en el rey de la fiesta. Tu único reto será que dejen de troncharse para que tú puedas contar el siguiente...

Navigation instruments have changed over time. Lodestones, sunstones, and sextants helped early navigators find their way. Modern technology makes navigation more precise than it has ever been. But the roots of navigation still remain. Created in collaboration with the Smithsonian Institution, this Spanish book ignites a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides English language learners through every step of the engineering design process. Inspire students to pursue a STEAM career with career advice from a real person working ...