Una Caminata en el Mundo de la Matemática

What's hidden in the woods? Look closely through three colored transparent sheets to discover hidden secrets. Start with green and nothing moves. As if by magic each sheet shows animals and plants coming to life. Watch nature's surprises emerge in front of your eyes.

Desde el enorme tiburón ballena, el pez más grande que existe, hasta el voraz tiburón blanco, los tiburones comprenden una amplia variedad de especies que habitan en todos los mares cálidos y templados. A través de las extraordinarias fotografías y los amenos textos contenidos en este volumen, sabrás cómo vive, cómo se alimenta y cómo se reproduce cada especie y conocerás la forma de vida de la raya, un pariente próximo del tiburón, aunque de costumbres muy diferentes.

Learn about the rich history of Mission San Luis Rey de Francia: how it started, the people who ran it, the indigenous population, and its legacy today.

Most of the Earth's changes happen over millions of years, but earthquakes can force significant changes to the land in just a few moments. Readers will learn the science of plate tectonics and its role in the development of earthquakes around the globe. They will also learn that not all rocks are created equal. In fact, rocks are all different ages! This Spanish-translated book concludes with images of the damage and destruction that earthquakes can cause.