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.

Kim es una muchacha de trece años que empieza a tener problemas con su alimentación. Se ve gorda y deja de comer. Con ayuda, acepta gradualmente que su comportamiento puede resultarle perjudicial a largo plazo. A medida que se recupera, entiende que su enfermedad no sólo tiene que ver con la comida... ¿Por qué se siente tan insegura? ¿Es sólo una cuestión de estética?

Dams change the landscape, providing reservoirs of freshwater and even producing electricity. Discover the engineering behind dams.

Describes how the rig was built, how it stands out in the water, and how much drilling it does in a day.

Introduces the life and times of Underground Railroad and anti-slavery leader Harriet Tubman and explains her place in American history.