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

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...

Cuando fluyen las emociones, todo llega a buen puerto. A corazón abierto, el debut literario de Susana Ramírez @Sosann Hace dos años a Susana le detectaron una enfermedad rara: Arteretis de Takayasu. Un fallo en el sistema inmune provoca que el propio cuerpo ataque a las principales arterias que conducen al corazon. Las inflama, dificultando que la sangre fluya por su cuerpo. Durante este tiempo Susana ha leído mucho acerca de su enfermedad, hasta encontrar el significado emocional de su enfermadad. Dicen que la Arteretis de Takayasu aparece en las personas que no son capaces de canalizar ...

Este libro ofrece una introducción a todas formas de vida en el océano y discute como el hombre ha dañado su ambiente.

How many hockey sticks are there? How many hockey players? Beginning readers will enjoy learning to count cardinal numbers with this brightly illustrated Spanish book! Featuring vivid images and easy-to-read text, this full-color book develops students' math and reading skills and introduces them to early STEM themes. The Math Talk section includes questions that will increase understanding of basic math and reading concepts and develop students' speaking and listening skills. Learning to count is fun and easy with this engaging text!