Los Mariachis

Dragonflies are large flying insects known for their brightly colored bodies and see-through wings. They are among the fastest insects in the world. Learn more about these amazing animals in Dragonflies, a Fascinating Insects book.

Se presenta una cuidada edición de uno de los manuscritos más antiguos sobre el arte de la navegación. Se trata del Ms. 46 de la Biblioteca General Histórica de la Universidad de Salamanca, cuya reproducción facsimilar se incluye a todo color, precedida de una detallada introducción, desdoblada en la doble vertiente histórica-astronómica, así como el estudio sobre las mismas, debidamente anotado por los autores, especialistas de referencia en sus respectivas disciplinas. Se completa con la transcripción, que facilita la comprensión, al corregir algunos aspectos erróneos en...

Help readers make a difference by encouraging them to learn about the various ways the environment needs our help and the things they can do to reduce their carbon footprint. Readers will learn about the effects of pollution, fossil fuels, renewable and non-renewable resources, deforestation, and recycling through interesting images and charts and informational text. This Spanish-translated nonfiction title features a glossary of terms and a list of helpful websites that encourages children to take part in helping the environment in many different ways.

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.