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 work narrates the meeting of two young students who in a chance chat, begin to play with stars and numbers and learn about physics, chemistry and astronomy. They learn that science is in everyday life so that we imagine it is not a restricted area, only for the geniuses, but a tool, a way of life, a passion.

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these feathered dinosaurs face to face: The Caudipteryx had feathered arms and a tail that looked like a pom-pom! The Sinovenator may have used colorful feathers to attract a mate! The Microraptor may have used its feathers to glide...

¡Descubre a Olivia, la protagonista de una serie de cómics repleta de aventuras, misterio, acción, personajes divertidos, un toque de magia, ecología y mucho humor! Con lo tranquila que estaba Olivia en la ciudad, y a sus padres les ha dado por mudarse a un pueblo en la montaña, en mitad de la nada. Y todo porque su madre tiene que salvar a la región de una devastadora invasión de pájaros gigantes. Qué rollo de verano, por aquí no hay nada con lo que entretenerse... ... Salvo una misteriosa pastora y sus lanosos perros lanosos, un par de monstruos y un genio sivergüenza. ¡Parece...

Filled with geographical and historical data, this unique book explains the beauty and characteristics of the Chihuahua desert, the largest desert in Mexico.