Piedra de toque

Diego y Patricia, una pareja de traficantes internacionales de obras de arte, son contratados por un millonario francés para realizar un trabajo «especial»: robar el Códice Calixtino, un manuscrito del siglo XII custodiado en la catedral de Santiago de Compostela. El Códice es mucho más que una guía para el peregrino. En sus páginas, oculto mediante una técnica medieval, se esconde un evangelio desconocido, donde se revelan datos inquietantes sobre la historia encubierta de la familia de Jesucristo, sus asombrosas relaciones de parentesco, los conflictivos orígenes del cristianismo, ...

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...

Did you know that nature is the world's largest science and engineering lab? Learn how designers and engineers use biomimicry to create or improve products. This title supports NGSS for Engineering Design.

Simple text and photographs introduce the concept of "skip counting," or counting by groups of a certain number, and present items for practice.