Un poema para mis abuelos

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these feathered dinosaurs face to face: The Caudipteryx had feathered arms and a tail that looked like a pom-pom! The Sinovenator may have used colorful feathers to attract a mate! The Microraptor may have used its feathers to glide...

Diego Valverde Villena (Lima, 1967). Magíster en Literatura Inglesa y licenciado en Filología Hispánica, Filología Inglesa y Filología Alemana. Ha realizado estudios de doctorado en las universidades de Oxford, Heidelberg, Tubinga, Chicago y Complutense de Madrid. Profesor de literatura en la Universidad Mayor de San Andrés y profesor visitante en universidades europeas y americanas. Sus ensayos recorren la literatura universal, con especial dedicación a la literatura hispanoamericana. Sobre Álvaro Mutis ha publicado Varado entre murallas y gaviotas. Seis entradas en la bitácora de...

What does swimming in a pool, drinking through a straw, breathing in air, and circulating blood all have in common? They all require a form of air or water pressure! Readers will discover the variety of ways that air and water pressure make an impact on our lives and the things in them. This fact-filled, Spanish-translated nonfiction title includes real-life examples and basic experiments to aid in the development of understanding physic and scientific concepts. Readers will be introduced to and learn about Archimedes Principle, atmospheric pressure, vacuums, water density, and hydraulics...

Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.