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¿Sabías que Marte parece una estrella roja brillante? A menudo se lo llama el Planeta Rojo. Descubre más cosas en Marte, uno de los libros de Los planetas. Did you know that Mars looks like a bright red star? It is sometimes called the Red Planet. Find out more in Mars, a Planets book.

An elementary introduction to the workings of the human body, the skeleton, skin, circulation, and nervous system.

Spanish English Bilingual children's book. Perfect for kids studying English or Spanish as their second language. This children's story has a message for children and parents alike, teaching kids compassion and creativity, while reminding parents the importance of quality time with their children.

Until just over 150 years ago, northern Mexico extended thousands of kilometers farther than its current border with the United States. Many different indigenous groups flourished in that region before the Conquistadors arrived. What we know about their lives and customs is the result of archeological discoveries and the chronicles of the first Spanish priests and soldiers that had contact with them.