BTS

Black holes are neither holes nor black. They're invisible and packed with matter! Future astronomers will find out many more fascinating facts about these space phenomena with this intriguing book. Carefully crafted text encapsulates the most important information about black holes, such as how scientists locate them and their significance in a star's life cycle. Amazing photographs support critical concepts and inspire a true appreciation of the spectacles of space.

La historia de la aventura de Alejandro es una historia sobre la búsqueda épica de los límites de lo posible, de lo que somos capaces. Así, desde su Macedonia natal, con su madre bruja y su padre tuerto y artero, ambos espíritus indomables, el jovencísimo Alejandro parece encarnar la curiosidad y el deseo de los jóvenes por probarse, por cuestionar lo que conocen, y sobre todo, por traspasar las expectativas que han caído sobre ellos.

You've only got one day to spend at the carnival-how do you make the most of your time? Students will learn how to measure time while reading about a fun-filled day at a carnival! This fiction Spanish book uses real-world examples to teach math concepts, and incorporates nonfiction reading to increase vocabulary and comprehension skills. The challenging practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they've learned to their daily lives. Essential text features like a glossary, index, and table of...

Este libro explora que es lo que sucede dentro y fuera de nuestro mundo, desde un volcán incadescente al Polo Norte helado.