Robotland

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

Escrito de manera concisa y llana, con ejemplos certeramente escogidos, anécdotas e ilustraciones tomadas de la historia de la cultura europea, acompañados siempre de análisis someros y ocurrentes, este libro enseña cómo la noción de belleza evolucionó desde su culto y fundación, en la antigua Grecia, hasta su patrón actual en que, a veces de modo sutil e irónico, penetra en todos los rincones de la sociedad y la cultura modernas.

Although Earth is mostly made up of igneous and metamorphic rock, sedimentary rock covers about 75 percent of Earth's land surface. This means it's the most visible kind of rock on Earth. Sedimentary rocks form when sediment accumulates and compacts. Your readers will learn how sedimentary rocks form, the different types of sedimentary rocks, and how people use sedimentary rocks. Fun fact boxes provide readers with additional information. A helpful diagram illustrates how sedimentary rocks form.

Frente al espejo es una conversación íntima entre amigos. Una confesión con el ánimo de agradecer a la vida. Un repaso en un momento crucial. Un poner por escrito lo que nunca se ha dicho. Una forma de sincerarse frente al espejo.