Cosmos en 3D

Interesting facts and experiments explore the dynamics of a race car engine to teach about air flow and drag, safety equipment and roll cages, the fuel system and horsepower, suspension and track bars, internal combustion, why race cars don't have speedometers, how roof flaps are designed like airplane wings, and more.

The author tells about the origin and development of two Spanish romances: The Alfambra woman buried alive and The lovers of Teruel. The first recounts the infidelity of a lecherous woman, the Countess of Alfambra, who betrays her husband by delivering him to his enemy; and whose final dénouement is the defeat of the adulterous couple and their being condemned to death by being burnt at the stake. The Story of the Lovers of Teruel recounts the tragic life of one of the members of the Marcilla family, enamoured of a rich damsel who returned his love. However, her father's refusal to consent...

It is the third Monday in January and school is closed. But do you know why? It's Martin Luther King Jr. Day. Turn the pages of this book to find out what dream Dr. King shared with the world, who Mohandas Gandhi was, how one brave woman helped Martin Luther King Jr. change history. Each book in the Holiday Histories series describes one of America's holidays or special days. Explore the history of each day and learn the real reason why it is important. Discover what special meaning each day might have for you.

Este libro de actividades con pegatinas está diseñado para niños de tres años en adelante. Ofrece sencillas y divertidas actividades que ayudarán a los niños a descubrir los números y las formas, con la ayuda de sus personajes Disney favoritos.

Pocas personas han alcanzado el nivel de inteligencia que tuvo este hombre, ninguna de ellas ha sido tan importante para la humanidad y el mundo contemporáneo, como él. Considere Ud. que, sin este personaje y sus teorías sobre la relatividad y el tiempo, jamás podrían haber existido objetos como celulares o computadores... Por nombrar los dos más usados inventos actuales. Y, aunque suspendió el examen de ingreso en la Politécnica, la revista Time le nombró "personaje del siglo XX", seguramente porque sus aportaciones a la física revolucionaron los conocimientos de la era...