La cruz ausente

En esta novela histórica el autor nos describe desde una perspectiva inédita la gesta de los marinos descubridores españoles y portugueses de finales del siglo XV y principios del XVI, personificados en Colón, los Pinzón, Magallanes y Elcano, entre otros. El narrador, encarnado en el padre Pinzón, único personaje de ficción de la obra, es testigo del primer viaje de descubrimiento y de la primera circunnavegación, y nos describe también «la otra parte», la tragedia que para muchos nativos de las nuevas tierras descubiertas significaba ser dominados por aquellos hombres que se...

Discover how the heart and lungs work together to keep the blood flowing and the body breathing in this book that provides pictures of real hearts and lungs and accompanying diagrams. Readers will learn about circulation and breathing as well as related vocabulary.

“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 horned dinosaurs face-to-face: Torosaurus had the biggest skull of any animal ever! Pentaceratops had five sharp horns on its head! Styracosaurus was as big as an ice cream truck! Plus, you'll get to know Centrosaurus,...

It's Ms. Frizzle's birthday and the class tries to bake a cake but winds up inside it, learning about mixtures and reactions that occur when ingredients are put together."

For ages, the idea of machines that think and act on their own has gripped scientists, thinkers, and the general public. This book explores the history of artificial intelligence (A.I.), and how science fiction is quickly becoming science fact. It examines the technologies involved in A.I. and its inevitable effects on work, life, health, and many other aspects of human society. Rooted in history and science, this book provides an inside look at a topic that captivates engineers, scientists, and dreamers, but also raises important ethical issues and challenges how we see ourselves and our...