El cielo nocturno

Three Quarters Of Our Earth Is Blanketed By Water. How This Water Is Used, From Bathing To Irrigating Crops Is Addressed. That Water Travels In A Never-Ending Pattern Called The Water Cycle. Tips On How To Conserve Our Most Important Natural Resource Are Included.

This Ever Popular Subject Is Explained In Detail In This Wonderful Book. How The Earth Is Made From Rock, The Three Different Types Of Rock And How They Are Made And Where They Can Be Found. Talks About How Fossils Are Formed From Sediment And What Role That Plays In Helping Us Learn About Life Long Ago. Talks About How These Fossilized Plants And Animals Became The Fossil Fuels That Are So Important To Our Present And Future Life On Earth.

Acuciosa biografía de Jules Verne, el autor de los Viajes Extraordinarios, enriquecida con textos e información novedosa. Constituye un mágico paseo por los sinuosos y complejos acontecimientos vitales que propiciaron la creación de su obra.

Explains the basic science of flight, the problems of getting vehicles into the air, different types of engines, and aircraft design, and includes instructions for making aircraft models.

Ice cream is a solid. But when it melts, it becomes a liquid. Solids can change to liquids and back again by melting and freezing. Read this Spanish-translated book to learn what happens when heat and cold and solids meet.

He aquí una excelente colección de las denominadas “frases y citas célebres”, supuestas o no, pronunciadas en la más diversas épocas y países según la tradición, por personajes en general importantes (de aquí el epíteto aplicado a las frases y citas) como emperadores, reyes, escritores y artistas. Al no existir la tecnología actual han sido conservadas desde hace mucho tiempo por tradición oral y escrita en documentos antiguos. Es imposible aseverar la autenticidad de todas, pero como dice el refrán italiano: “si no son ciertas, están bien encontradas”.