Debajo de la Tierra/Debajo del Agua

Un libro de referencia para todas las preguntas que chicos y chicas se hacen sobre el sexo, aunque les resulta incómodo hablar de ello. Con textos escritos por profesionales, serio, riguroso, pero al mismo tiempo ameno y divertido. Porque la mejor protección es la información.

Expanding on our popular Let’s Explore Science series, this book focuses on the scientific method. The scientific method is a step-by-step process for solving science problems. Scientists use it every day. Explaining each of the five parts; observing and asking questions, researching your topic, forming a hypothesis and testing it, designing and conducting an experiment, and analyzing and drawing conclusions from your result are all mapped out in detail. Learn how this straightforward topic can sometimes be a little trickier than it seems! This book will allow students to generate and...

Lin invites her friends to her Japanese teahouse. They have rice, fish, and tea. Lin thanks them for coming and her friends thank her for the tea ceremony.

The most secret and elite of special forces groups, U.S. Army Delta Force fights terrorism, hunts down war criminals, and performs dangerous surveillance missions.