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.

This book introduces the former Duke University basketball star, Grant Hill, who now plays for the Detroit Pistons.

Presents the life story of the Mexican-American labor leader who helped achieve justice for migrant farm workers by creating a union to protect their rights.

These poems speak about the nature of the Chilean countryside, of its animals, its aromas, and its stars. These are verses that invite us to direct our gaze from the Earth to the sky, from the smallest things to the most magnificent. The rhymes and poems compiled in this anthology introduce children to the works of Gabriela Mistral, and allow them to enjoy this poetry that is "infused with heart" by the only female Latin American author to win the Nobel Prize for Literature. Poemas que hablan de la naturaleza propia del paisaje chileno, de sus animales, de sus aromas y de sus astros. Versos...

En esta guía recorremos las posibilidades que nos ofrece el abanico de servicios y aplicaciones Google. Revisamos sus características y funcionamiento así como también los mejores trucos y secretos para aprovechar estas herramientas al máximo. Desde el omnipresente Chrome y nuestras cotidianas búsquedas, hasta los servicios más avanzados como Analytics y Trends, todas las aplicaciones pueden ofrecernos más ¡si las investigamos y aprendemos más sobre ellas!