Florence Nightingale

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

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

Solar Energy Is Explained. Included In This Book Is Where It Comes From, Who Uses It, And The Positive And Negative Benefits Of Using It. Correlated To Common Core, Texas TEKS, Virginia Sols, And Georgia Performance Standards.

OF COURSE you think I was the bad guy, terrifying poor little Jack. You don't know the other side of the story. Well, let me tell you... Fully translated Spanish text. SEGURO que piensas que yo soy el malo del cuento y que me dedico a aterrorizar al pobre Juan. No conoces el otro lado de la historia. Pues bien, te la voy a contar...

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.

«¡Sé plural como el universo!», reza un aforismo de Fernando Pessoa. Y así fue él como hombre y como poeta, de una multiplicidad única. A través de los autores a los que dio vida, como Alberto Caeiro, Ricardo Reis o Álvaro Campos, el poeta portugués consiguió hacer una personalidad, un heterónimo, de cada uno de sus principales contradicciones. En sus páginas dejó testimonio de una de las obras y vidas más intrigantes de la literatura del siglo XX. Ajeno a los mitos de la historiografía romántica, Ángel Crespo relata la trayectoria vital del personaje, en un viaje a la...

El cielo verde y la calma de los ‡rboles significan peligro. ÁViene un tornado! Hay que buscar refugio. Lee sobre estas tormentas impresionantemente fuertes en este libro sobre los tornados.