Ciudad antes del alba

Five and counting! So far, astronomers have discovered five dwarf planets in our solar system. Pluto, which was once thought of as the ninth planet, is today classified as a dwarf planet. This book looks at the current dwarf planets, characteristics, size, and orbital patterns, as well as the three rules scientists follow to characterize these tiny, round space objects. Every day new discoveries are being made. Who knows how many dwarf planets we will find in the future! This book will allow students to understand that patterns in the natural world can be observed, used to describe phenomena, ...

The most secret and elite of special forces groups, U.S. Army Delta Force fights terrorism, hunts down war criminals, and performs dangerous surveillance missions.

At an early age, Steve fell in love with the possibility of the computer machine. He knew it had the power to change someone's life. Inspired to create a personal computer accessible for everyone, Steve went on to become one of the most influential inventors the world has ever met. This inspiring story of the visionary and entrepreneur features a facts and photos section at the back.

La política concierne a todo el mundo, incluyendo a los niños. Es lo que nos permite acordar las reglas para convivir de manera equilibrada. ¿Cómo se convierten en políticos los hombres y las mujeres? ¿Qué hacen los gobernantes? ¿Qué es una ley? Descubramos la respuesta a muchas preguntas sobre la política divirtiéndonos con juegos y cuestionarios. Politics concerns everyone, including children. It is what allows us to agree on the rules to coexist in a balanced way. How do men and women become politicians? What do the rulers do? What is a law? Let's discover the answer to many...