El ciclo del nitrógeno (The Nitrogen Cycle)

La historia de la ciencia no es ni más ni menos que la historia de nosotros, los seres humanos, tratando de entender y explicar el universo que nos rodea. Y, como nosotros mismos, es contradictoria, misteriosa, intrigante, traicionera, ambiciosa, valiente y, por momentos, insólita. En este libro vas a conocer a personas curiosas, perseverantes, observadoras, testarudas e ingeniosas, y vas a acercarte a los caminos que las llevaron a descubrimientos increíbles, errores catastróficos y, sobre todo, a hacerse nuevas preguntas. La historia de la ciencia está llena de sorpresas, personajes y...

Surveys the life of Sojourner Truth, who escaped from slavery and became famous as an advocate of equal rights for women and blacks.

A bilingual dictionary offers translations of more than twenty thousand words, examples of different uses in context, cultural information, warnings of false cognates, and explanations of the rules of Spanish grammar and common difficulties.

Are you ready to embark on a wild counting caper? Imagine... eleven oysters at the opera, eighteen dalmatians dressed in diamonds, and twelve ladybugs shopping in the market! Meet an unforgettable host of zany creatures in this delightful bilingual counting book. Readers will encounter concepts such as color, time, size, shapes, and more as they answer questions relating to colorful cut-paper illustrations. Nancy María Grande Tabor's concise and direct questions encourage thinking while her charming characters entertain. In both Spanish and English, this unique counting book challenges...