El ciclo del nitrógeno (The Nitrogen Cycle)

El libro que explica a los niños qué es la constitución de una forma dinámica y asequible. Escrito por Javier Pérez Royo, jurista, experto en la constitución española y actual divulgador de la ley. «Constitución» es una palabra que todos conocemos. La hemos oído miles de veces, en la televisión, en la radio... Sabemos que es algo importante porque, a menudo, se habla de proteger la constitución, de respetarla o de preservarla. Pero ¿qué es la constitución? Si tuviéramos que explicárselo a un extraterrestre que viniera de visita, ¿qué le diríamos? Por medio de ejemplos...

Over the years, people have looked for ways to improve our imperfect sight. This has led us to the world of optics, which is the study of light and how it travels. What are some of these innovations that have changed how we see the world, and how do they work? Find the answers to these questions with this Smithsonian Informational Text! Created in collaboration with the Smithsonian Institution, this text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step...

Readers will discover what you can do at a post office, such as buying stamps, checking a PO box, and sending a letter. This book's easy-to-follow narrative makes it perfect for beginning readers. A photo glossary offers new vocabulary, while a website link page suggests routes to more information.

El pueblo wixarica, tambien conocido como huichol, vive en dialogo constante con sus dioses. De su presencia en la vida ceremonial y cotidiana da cuenta este libro, en wixarika y en espanol, como forma de acercarse a la cosmogonia de nuestra tierra. The Wixarika, also known as the Huichol, live in a constant dialogue with their Gods. This book provides a look into their ceremonial and daily lives. The text has been written in Wixarika and Spanish as a means to provide a glimpse into the cosmogony of the Earth.