Robótica e inteligencia artificial (Futuros Genios 5)

¡Conoce al iguanodon, un dinosaurio herbívoro que pesaba toneladas literalmente! Las imágenes coloridas ayudan a los lectores a aprender cómo era la vida para estos comedores de plantas de punta. Meet the iguanodon, an herbivore dinosaur who weighed tons—literally! Now in Spanish, carefully leveled text and colorful images help readers learn what life was like for these spiky-thumbed plant-eaters.

The United States grew rapidly from the time of the Louisiana Purchase to the building of the Transcontinental Railroad. All of this expansion came at the expense of Native American populations that had either lived in the region for centuries or been forced there from ancestral homes in the East. Tribes memorably fought on their own and together in an doomed effort to retain the land and a lifestyle that had long sustained their families. This book outlines some of the major conflicts of the Westward Expansion, and of the treaties and were signed, and often broken, by representatives of the...

Nosotros, el pueblo de Who HQ, traemos a los lectores la historia completa (argumentos y todo) de cómo surgió la Constitución de los Estados Unidos. We the people at Who HQ bring readers the full story--arguments and all--of how the United States Constitution came into being in this Spanish entry in the WHO HQ series. Firmada el 17 de septiembre de 1787, cuatro años después de la Guerra de la Independencia, la Constitución estableció la ley suprema de los Estados Unidos de América. Hoy es fácil que demos por sentado este proyecto de gobierno. Pero los legisladores (cincuenta y cinco...

¿Qué tienen en común una tortuga marina, una iguana y una pitón? ¡Son todos reptiles! Conozca las características que comparten todos los reptiles. What do a sea turtle, an iguana, and a python have in common? They're all reptiles! Learn about the characteristics that all reptiles share.