El Secreto de La Piramide + CD

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.

How do you truly engage students in learning history? When students make personal connections to the subject, they’re much more motivated to learn. This Spanish book provides firsthand accounts of history that give personal insights into historical events. Students will learn about Alta California by examining the maps, letters, images, photographs, and art that emerged during the Mexican rule of California. With a visually appealing layout, this book features captivating text, fun facts, sidebars, and time lines that help students grasp the essential concepts they need to know at their...

Simple text and photographs introduce the concept of symmetry as displayed by familiar creatures and objects.

Lo confieso: yo, Fabio MNZ, soy un loco de los enigmas sin resolver. Me encantan los misterios grandes, los misterios chicos... e incluso los que al final no son tan misteriosos. Así que a veces, si no hay algo raro, ¡me lo invento! Seguro que hay cosas que nunca te has planteado... ¿Existen los fantasmas? ¿Por qué los extraterrestres tienen la cara ovalada? ¿Quién se esconde detrás del Fabio que ves en tu pantalla? Pues yo sí me lo planteo a diario. Porque te voy a contar un secreto: todos los días me pasan cosas que no tienen explicación. MUY FUERTE, ¿verdad?