El Pacto Del Mayflower /

Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.

The Uses Of Wind Energy Is The Topic Of This Book. Explains The Positive And Negative Impact This Form Of Energy Can Have On Our World.

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

The jaguar is a ferocious animal that roams in areas of dense vegetation. He is the keeper of the American forests. The jaguar is strong, beautiful, famous, vain and a lonely animal. Young readers will be delighted with the jaguar as they learn more about this cat and his habitat.

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.

Learn about the rich history of Mission San José: how it started, the people who ran it, the indigenous population, and its legacy today.

Ciencia para niños es sobre todo un libro divertido que interactúa constantemente con el lector y lo sumerge en las maravillas de la ciencia. Su principal objetivo es acercar la ciencia a los niños a través de un viaje por la ciencia y la tecnología. Se trata de un viaje en el tiempo, desde la actualidad hasta la antigüedad y, a su vez, por diferentes rincones de la tierra y por la inmensidad del universo. Disponible en catalán, para comprarlo haz clic aquí.