Bocas de animales / Animal Mouths

Desde el origen de la humanidad se ha buscado la felicidad. Sabemos que existe, aunque a veces aparezca disfrazada, secuestrada por el dolor, el miedo, la depresión o el odio. Se llega a la conclusión de que, en el mundo de hoy, la mayoría de las personas nos consideramos generalmente felices la mayor parte del tiempo.

Here's another exciting set of sports-themed titles for third- through sixth-grade readers reading at a first-grade level. Help to even out the playing field for your at-risk readers with these sports heroes and hot shots.

Discover how the heart and lungs work together to keep the blood flowing and the body breathing in this book that provides pictures of real hearts and lungs and accompanying diagrams. Readers will learn about circulation and breathing as well as related vocabulary.

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...