¿Comen hierba los tigres?

Plants are the living things that have been on the planet longer. How do they manage to protect themselves if they can't move? Explore the different mechanisms that plants use to survive in different habitats.

Vida de Alexia González-Barros (1971-1985), que falleció en olor de santidad a causa de un cáncer cuando solo tenía 14 años. En proceso de beatificación en la actualidad.

La estética de la Baja Edad Media, de la mano de la escolástica, aporta a la metafísica de la proporción y a la metafísica de la luz un sistema conceptual. Ésta es, de hecho, la “primera sistematización” del vocabulario estético. La antigüedad había trabajado ciertos contenidos de este vocabulario, pero no había construido ningún sistema que garantizara un cierto rigor de uso. Será la Baja Edad Media, gracias al énfasis puesto en la obra aristotélica y especialmente en el “organon”, la que ofrecerá a la estética su primera sistematización conceptual que, además,...

"This book will allow you to share with your child compositions full of strength and creativity side-byside (you color on one page and the little one on the opposite). Children and moms will enjoy coloring... together. Sharing games and leisure with children is highly recommended, and this is a perfect book for mothers who love to color and enjoy leisure time with their children."

When it's hot outside, what can you do to stay cool? People have found many ways to cool off and cool down. How cool is that? Created in collaboration with the Smithsonian Institution, this STEAM book will ignite a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that is perfect for makerspaces and that guides students step-by-step through the engineering design process. Make STEAM career connections with career advice from actual Smithsonian employees working in STEAM fields. Perfect for English language learners, this Spanish book builds young ...