Los ciclos de vida de los peces (Fish Life Cycles)

Filled with tricks and treats, fun and food, Halloween is a day that children look forward to. At one time two separate festivals, the traditions of each gradually blended into the holiday we now celebrate on October 31.

Un libro para saber mucho más sobre el petróleo, también llamado "oro negro". ¿Cómo se ha formado a lo largo de los siglos? ¿Es la única fuente de energía que existe? Incluye un CD con imágenes y un póster gigante para conocer algo tan familiar y, a la vez, tan desconocido.

Como pétalos vuvelan las letras y los versos formando un ramo de sentimientos que salen del alma como inspiración y sin remordimiento entre estrofas que fluyen con el viento proveniente de: Argentina, Bolivia, Chile, Colombia, Ecuador, El Salvador, Guatemala, Italia, México, Nicaragua, Paraguay, Perú, Puerto Rico, Uruguay, Venezuela.

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...