Se llamaba Álvaro

In what ways are the branches of government like a basketball game? How can a school yard game's rules liken themselves to a constitution? Through engaging analogies and introductions, our new Spanish-language government series gets English language learners ready for election 2008. Correlated to the fourth and fifth grade social studies curriculum, My American Government introduces students to how our government works. Students learn about the U.S. Constitution, the branches of government, citizens' basic rights, and how we elect our leaders.

Anthony Cade, que ejerce de guía turístico en África del sur, recibe de un buen amigo una extraña misión que le devuelve a Inglaterra. A su llegada, se ve envuelto en una telaraña de asesinatos, chantaje y traición, relacionados con las luchas políticas internas de Herzoslovaquia, y en una romántica y misteriosa historia de amor. Todo eso complica la vida de Anthony... pero, ¿quién es en realidad Anthony Cade?

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...

Tras acompañar a H. W. Bates en su exploración por el Amazonas (de 1848 a 1852), Alfred Russel Wallace emprende la exploración del archipiélago malayo con el objetivo de avanzar en los descubrimientos sobre la selección natural de las especies. De resultas de este viaje (1854-1862), y seis años después, Wallace publica The Malay Archipielago (1869), obra cumbre de la literatura de viajes y un referente de los libros de ciencias del siglo XIX. [Resumen del libro].