Agricultura y ganadería en Texas (Agriculture and Cattle in Texas)

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.

Por qué hay día y noche? Porque la Tierra gira sobre sí misma en 24 horas y porque el Sol no puede iluminar más que un lado a la vez.El cielo, las estrellas y la noche ilustrado por Christian Broutin, Henri Galeron y Pierre-Marie Valat, es un libro de la colección Altea Benjamín, la enciclopedia para responder a las preguntas de los niños que ya leen solos. ENGLISH DESCRIPTION Why is there day and night? Why does the Earth rotate on its axis and comes full circle in 24 hours? Why does the Sun only illuminate one side of the Earth at a time? Fascinating information about space and...

A researcher looks at cells under a microscope. A scientist studies bacteria in a Petri dish. A student boils liquid in a test tube. What do these things all have in common? The answer is: glass! Learn how something as simple as glass has played a huge role in scientific exploration with this fascinating Spanish Informational Text created in collaboration with the Smithsonian Institution! Build reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, this Spanish book features a hands-on STEAM challenge...

¡Descubre a Olivia, la protagonista de una serie de cómics repleta de aventuras, misterio, acción, personajes divertidos, un toque de magia, ecología y mucho humor! Con lo tranquila que estaba Olivia en la ciudad, y a sus padres les ha dado por mudarse a un pueblo en la montaña, en mitad de la nada. Y todo porque su madre tiene que salvar a la región de una devastadora invasión de pájaros gigantes. Qué rollo de verano, por aquí no hay nada con lo que entretenerse... ... Salvo una misteriosa pastora y sus lanosos perros lanosos, un par de monstruos y un genio sivergüenza. ¡Parece...