Thomas Edison

Una mariposa madre pone huevos. Los huevos se convierten en orugas. ¿Pero qué sucede después? Descúbrelo en esta observación paso a paso del ciclo de vida de la mariposa. A mother butterfly lays eggs. The eggs hatch into a caterpillar. But what happens next? Find out in this step-by-step look at the butterfly life cycle, now in Spanish.

Beautiful full-color photographs and informative text, in both English and standard Latin-American Spanish, introduce readers to our Moon. They will learn about the Moon’s phases, that people have been to the Moon, and many more exciting facts. This is a great addition to any aspiring astronomer’s library.

Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, and who works against it, and all other forces that contribute to a successful dive or climb. After reading this book, readers can decide if they will ever be interested in engaging in one of these extreme sports.

¡Los gorilas son los primates ma ́s grandes del mundo! Estos amables mami ́feros deambulan por la selva,viven en grupos grandes y buscan frutas y brotes de bambu ́ para alimentarse. Sube a los a ́rboles y conoce a estos poderosos y amigables primates.