Ciudad antes del alba

A Spanish edition of a popular look-for book is filled with translated rhyming riddles in which readers are invited to find hidden objects in a complicated arrangement of colorful objects.

Explore fascinating robotic technology through the ages, from the earliest automatons to modern humanoid helpers. From automata created by Leonardo Da Vinci to modern-day androids and animal robots, this book covers artificial intelligence (AI) throughout history. Discover the latest at the cutting edge of robotics, where science, technology, mechanical engineering, and computing meet as Robot explains how robots work, how they are made, and how they help and sometimes hinder in modern society. This kids' robot book showcases the latest and greatest innovations in AI through bright graphics...

Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!

Si usted es de los que piensan que apenas hay relación entre la condición humana y las matemáticas, tiene que leer este libro. En él se encontrará con la mitología, la música, la guerra, la astronomía, la literatura... y las matemáticas viajando juntas a través del tiempo y del espacio; desde Egipto, Mesopotamia, la Grecia clásica o la Constantinopla asediada por los turcos hasta la Polonia ocupada por los nazis, Los Álamos de las primeras bombas atómicas o Hiroshima y Nagasaki. Un periplo fascinante desde el centro de la Tierra a los planetas exteriores del sistema solar, del...