Agujeros negros (Black Holes)

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.

The novel opens on a cold, gray landscape. It is the beginning of December. Oak fires are burning in the stately flickering hearths of Nideck Point. It is Yuletide. For Reuben Golding, now infused with the gift of the wolf and under the loving tutelage of the Morphenkinder, this Christmas promises to be like no other...

En este libro, Dolores Guerra canta lo que une al ser con los demás, sin negar aquello que lo separa y lo hace único e irrepetible. Versos desordenados rigurosamente encierra, como toda poesía, un diálogo perpetuo entre el yo profundo y la circunstancia vital en la que la autora se desenvuelve. Aprendamos de este diálogo que se puede crear un mundo donde la palabra tenga su fuerza para comunicar el amor y otras cosas sutiles que llenan la existencia del ser en cada instante.

Cynthia Ann Parkers family moved to Central Texas when she was about nine years old. A year later, a large force of Comanche warriors attacked Fort Parker and seized Cynthia Ann and four other captives. The other four were eventually released, but she lived among the Indians for 25 years, immersed in the Comanche way of life. Though given a number of opportunities to go back to her white family, she always chose her life with the Comanche, choosing instead to stay with her husband and children. She eventually returned to white society as an adult.

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.