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.

The story of a family that left Cuba for Venezuela and ended up in Miami. Family members are shown celebrating a birthday, making music and playing together. -- La historia de una familia que se fueron de Cuba para Venezuela y por fin llegaron en Miami. Se ven los miembros de la familia celebrando un cumpleaños, tocando música y jugando juntos.

With life-like illustrations and simple text, books in this series introduce children to different dinosaurs and the unique characteristics. Children learn the features of each dinosaur, what they ate, and whether they were predator or prey to other dinosaurs. The books also introduce fossils and how they play a role in our knowledge of dinosaurs' existence.

A dictionary tailored for the Latin American market is an ideal supplement to the middle school curriculum and includes up-to-date definitions, example sentences, synonyms and antonyms, and more. Original.

Como bien sabes, es común que todos nos relacionemos de una manera u otra; igual pasa con las ciencias que explican el mundo en el que vivimos, son como una gran familia. La Ciencia, en general, es como la abuelita; Matemáticas es la madre, trata de explicar cómo se formó el Universo con ayuda de sus hijas: Astronomía, la mayor; Geología, la que sigue; Biología, la hija sándwich, y las gemelas Física y Química, que no por ser las más pequeñas, son las menos importantes. Cuando la hermanas juegan entre ellas, crean otras ciencias interesantes en las que participan figuras de...