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.

Una colección de libros para dejar de ser un bebé. La fantasía nos ayuda a crecer, y con el pato del pipí, la oveja de los sueños, el elefante de los mocos y el pájaro de la comida, los más pequeños aprenderán a utilizar el orinal para hacer pipí, la almohada para dormir, el pañuelo para sonarse y la cuchara para comer.

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

Find out about the different types of winds, including global winds, trade winds, local winds, and breezes. Learn about extreme wind weather like hurricanes and tornadoes. Translated title: Gusts and Gales: A Book About Wind

Un libro de referencia para todas las preguntas que chicos y chicas se hacen sobre el sexo, aunque les resulta incómodo hablar de ello. Con textos escritos por profesionales, serio, riguroso, pero al mismo tiempo ameno y divertido. Porque la mejor protección es la información.