Algoritmos: la base de la programación de computadoras (Algorithms: The Building Blocks of Computer Programming)

Describes where fossil fuels come from, their uses and forms, the harm they cause to the environment, and sources of renewable energy.

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

New in the Little People, Big Dreams series, discover the life of Mohandas Gandhi, the father of India, in this true story of his life. As a young teenager in India, Gandhi led a rebellious life and went against his parents' values. But as a young man, he started to form beliefs of his own that harked back to the Hindu principles of his childhood. Gandhi began to dream of unity for all peoples and religions. Inspired by this idea, he led peaceful protests to free India from British rule and unite the country—ending violence and unfair treatment. His bravery and free-thinking made him one of ...

Describes the ancient giant kangaroo of Australia's distant past that was five times the size of today's largest kangaroos. Discusses how the animal lived and how it became extinct.

La muy interesante historia del bribón español Pedro Chamijo, “el falso Inca”, toma en la pluma de Roberto Payró un simpático tono que no por eso oculta por completo la tragedia que para las tribus nativas sudamericanas representaron la ignorancia y brutalidad de los conquistadores españoles, sumada a su propia torpeza política. Escrita con agilidad y humor, esta es la historia acerca de la leyenda del Gran Paitití, el Gran Padre Blanco custodio de la ciudad creada por los Incas para refugio contra los extranjeros, que según antiguas tradiciones se apoderarían del país, y su rol ...