¿Por qué hibernan los animales? (Why Animals Hibernate)

Computer science is all around us, at school, at home, and in the community. This book gives readers the essential tools they need to understand the computer science concept of debugging. Brilliant color photographs and accessible text will engage readers and allow them to connect deeply with the concept. The computer science topic is paired with an age-appropriate curricular topic to deepen readers' learning experience and show how debugging works in the real world. In this book, readers will investigate what's wrong with a microscope and learn how to fix it. This nonfiction book is paired...

A 2014 survey by the Substance Abuse and Mental Health Services Administration showed that 8.7 million youths ages twelve to twenty reported drinking alcohol beyond “just a few sips” in the previous month. Those who start drinking before age fifteen are five times more likely to become dependent on alcohol than those who begin at twenty-one. This resource shows young people how to help a friend who is abusing alcohol. It arms them with facts about alcohol, how it affects the teen mind and body, how to look for signs of a problem, and how to bring others on board to help.

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...

Descubre todos los secretos de los jeroglíficos. ¡Te sentirás como en el antiguo Egipto! La escritura jeroglífica egipcia es uno de los sistemas de escritura más bellos, fascinantes y expresivos que se han inventado nunca. En el Antiguo Egipto sólo un selecto y reducido número de personas sabía leer y escribir jeroglíficos, pero ahora tú también puedes reconocer y escribir una selección de nombres, títulos, descripciones, refranes, saludos ¡e incluso insultos! La escritura jeroglífica es muy diferente a la escritura que nosotros conocemos, los signos expresan emociones,...