El ferrocarril transcontinental (The Transcontinental Railroad)

People today refer to the Midwestern and prairie states as flyover country. During the Civil War, crossing those areas was the biggest obstacle in uniting the East and West Coasts of our divided nation. An act of Congress in 1862 authorized the Central Pacific and the Union Pacific railroad companies to build a railroad that would link the coasts. Seven years later, on May 10, 1869, an overwhelmingly immigrant labor force completed the task when a rail line was join in Promontory, Utah. The states had become united at last.

El Tombuctu nos habla de la gran inundacion de la ciudad de Mexico ocurrida en 1629. El preso numero cuatro retrata la vida colonial durante el siglo XVIII y cuenta la vida de tres personajes muy humildes que por azares del destino van a la carcel de la Santa Inquisicion y acaban formando una familia.

El Zoológico Nacional Smithsonian es una de las atracciones más populares de Washington DC. Únete a los cuidadores del zoológico y aprende sobre los problemas únicos que enfrentan y sus soluciones creativas para mantener felices y saludables a los animales del zoológico. Creado en colaboración con la Institución Smithsonian, este libro en español despertará la curiosidad sobre los temas de STEAM a través de ejemplos del mundo real. Presenta un desafío STEAM práctico que es perfecto para espacios de creación y que guía a los estudiantes paso a paso a través del proceso de...

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute...

Discover how the butterflies colors are made up of, how they eat, and how they become the beautiful insect you see today