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...

Este libro contiene 90 entrena-mentes, actividades diseñadas para mejorar el funcionamiento de tu cerebro: ejercicios de memoria, juegos de palabras, problemas numéricos, retos visuales, códigos secretos, variantes divertidas del sudoku...

Animals talk with sounds, but they talk with their bodies, too! This engaging Spanish book teaches beginning readers about different ways that animals communicate. Engage students in reading as they develop their early childhood literacy skills. With TIME For Kids content, this full-color book is aligned to state and national standards, and introduces students to simple informational text features.

"Discusses how people make sense of Earth by making maps and introduces globes, flat maps, and the idea of making borders"--Provided by publisher.

En la actual provincia argentina de Mendoza, en América del Sur, hace miles de años había mujeres y hombres luchando por sobrevivir. El rigor de la Era del Hielo, el peligro constante representado por fieras gigantescas y catástrofes naturales devastadoras, sumergieron a esos seres humanos en el terror, la superstición y la mayor brutalidad hacia los más débiles. Esta es la historia de Ulka, una joven que aprenderá a vivir y luchar por ideales que algún día serán los de toda la Humanidad: la libertad y el respeto por la vida en todas sus manifestaciones. En sus aventuras por esas...