Piedra de toque

Un libro interactivo que revela cómo eran los primeros seres humanos. ¡Levanta las solapas, haz girar las ruedas y abre las ventanas de sus páginas si quieres descubrir una visión muy animada de la vida cotidiana de nuestros lejanísimos tatarabuelos!

El niño Claudio se fija en las cosas que ocurren en un campamento de verano para niños con poderes sobrenaturales.

Automobiles are an essential part of life for many, but few really understand how that car arrives in their garage in the first place. This book takes an exciting look at just how interesting that process is, from the design phase in an engineer’s office to the floor of a factory where it is assembled piece by piece by both people and machines. Full-color photographs bring the process to life in vivid detail, and a step-by-step how-to guide explains how readers can even build their very own model car.

Learn more about the renowned British scientist, professor, and author who spent his entire career trying to answer the question: "Where did the universe come from?" Stephen Hawking was born exactly three hundred years after the death of the scientist Galileo, so maybe it was written in the stars that he would become a famous scientist in his own right. Although he was diagnosed with a neurological disease at age 21, Stephen did not let the illness define his life. Known for his groundbreaking work in physics, and identified by his wheelchair and computerized voice system, Stephen continued...