UN REFLEJO ARCOIRIS

Explains, in simple terms, the reasons for skin color, how it is determined by heredity, and how various environmental factors affect it.

This fun book introduces readers to basic geography words. On each page, a child gives clues to the kind of landform they are sitting on. Then they ask the question, Where am I? Young readers learn about mountains, caves, deserts, and other things in our natural world. An activity at the ends asks readers to match photos with their landform names.

¡Resuelve todos los PORQUÉS con la Enciclopedia Britannica! ¿POR QUÉ explotan las palomitas? ¿POR QUÉ los perros se huelen el culo los unos a los otros? ¿POR QUÉ tenemos hipo? ¿POR QUÉ pican los mosquitos? Abre este libro para responder estas preguntas... ¡y muchas más! Repleto de datos curiosos, historias sorprendentes y misterios sin resolver sobre el mundo que nos rodea, este libro es el mapa para la emocionante aventura que comienza preguntándose ¿POR QUÉ?

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...