¿Por qué hibernan los animales? (Why Animals Hibernate)

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

Although Earth is mostly made up of igneous and metamorphic rock, sedimentary rock covers about 75 percent of Earth's land surface. This means it's the most visible kind of rock on Earth. Sedimentary rocks form when sediment accumulates and compacts. Your readers will learn how sedimentary rocks form, the different types of sedimentary rocks, and how people use sedimentary rocks. Fun fact boxes provide readers with additional information. A helpful diagram illustrates how sedimentary rocks form.

Enamorado de la vida y de las causas de los oprimidos, Neruda, poeta del amor y la libertad (premio Nobel de Literatura 1971), representa y sintetiza todo el vigor y contradicciones de un mundo a la vez muy reciente y antiguo: América del Sur.

Este libro es una divertida herramienta para entender mejor los pasajes del Evangelio, como las Bienaventuranzas, y comprobar que son muy actuales.

Poetic text recounts the childhood of the noted Spanish poet, including his love for the nature and folklore of his native Andalusia, his introduction to music and literature at home, and his health problems.

Apasionada por el universo imaginario de las diferentes culturas africanas en Cuba, Lydia Cabrera inició en París la publicación de una extensa obra de investigación. Contes négres de Cuba (1936), traducidos por Francis de Miomandre, se acogía la poderosa corriente que las culturas africanas habían despertado en Europa de la mano de Leo Frobenius, Blaise Cendrars y Paul Morand, entre otros. Concebidos inicialmente como una serie de relatos para aliviar la enfermedad de su amiga Teresa de la Parra, el libro atrajo inmediatamente la atención de la crítica. De regreso a Cuba en 1939,...