Marta

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...

Navigation instruments have changed over time. Lodestones, sunstones, and sextants helped early navigators find their way. Modern technology makes navigation more precise than it has ever been. But the roots of navigation still remain. Created in collaboration with the Smithsonian Institution, this Spanish book ignites a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides English language learners through every step of the engineering design process. Inspire students to pursue a STEAM career with career advice from a real person working ...

INCLUYE RECETARIO CON VARIAS RECETAS Aprenderás a elaborar auténticos jabones naturales mediante el llamado “proceso de saponificación en frío”. Este tipo de jabones artesanos limpian en profundidad todo tipo de pieles, especialmente las pieles delicadas y sensibles. No contienen ningún tipo de detergente y son ecológicos y biodegradables. Aprenderás a personalizarlos con diferentes propiedades para cada tipo de piel. Hacer jabones en casa es barato. Los ingredientes necesarios para hacer jabón son económicos y fáciles de conseguir. Además, puedes hacer los jabones para tu...

�Qu� pasar�a si te encontraras a un beb� b�ho en tu patio? �Sabr�as qu� hacer? �D�nde ir�as a pedir ayuda? �nete junto con Madie y Max mientras aprenden una valiosa lecci�n sobre un peque�o b�ho perdido en El rescate del beb� b�ho. El par de hermanos s�lo quer�an jugar beisbol. �Nunca esperaron encontrarse cara a cara con un animal salvaje! Esta historia nos recuerda a todos que vivimos en un mundo rodeados de animales salvajes, y esos animales se merecen nuestro respeto y tenemos que ser cautelosos.