¿Qué Son Los Bienes y Servicios? (What Are Goods and Services?)

Did you know that jellyfish are found in every ocean? A group of jellyfish is called a bloom. Learn more about these stinging drifters in All About Jellyfish.

Este texto de la colección "El juego de la ciencia" tiene por objetivo enseñar de forma didáctica una serie de experimentos científicos que sorprenden en el campo de la luz. Específicamente, los chicos aprenderán a crear un arcoiris con mucho ingenio, a comprender cómo funciona el mecanismo de mando a distancia, a elaborar con un estuche de discos compactos una fotocopiadora, a crear un caleidoscopio o un periscopio, a mirar con atención en una cuchara como se distorsiona la luz reflejada en ella, entre otros. Así, con estos libros experimentas el mundo de la ciencia utilizando...

Though few may know his name, his achievement as the first European to discover San Diego Bay and many other areas on the California coast enshrines his name in the annals of American history. This exciting volume tells Cabrillo's story from an unknown soldier to the intrepid conquistador, crossbowman, landowner, shipbuilder, and explorer he became. As one of Hernan Cortes' soldiers during the conquest of Mexico and a founder of Guatemala, his actions loomed large in the future of both South America and North America. By both educating and entertaining, this biography illuminates a...

Explains the study and teaching of the martial arts, emphasizing the philosophical aspects of this sport.