Preocupación

"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...

Readers learn the basics of caring for common household pets, from physical features, to behavior, to diet. Also explored is how the animal's natural habitat differs from the habitat provided in the home.

Many insects hatch from eggs and molt several times as they grow bigger. Others, such as butterflies, undergo a complete metamorphosis. A common science curriculum topic, insect life cycles may be confusing because of these differences. However, this book breaks down these cycles into easy-to-understand steps in both accessible language and colorful diagrams readers can turn to for review again and again. The most important vocabulary needed to talk about insect life cycles is further explained in fact boxes and an extended glossary.

¿Qué hay de real en las reliquias de Indiana Jones?, ¿existe el auténtico Santo Grial?, ¿estaban realmente los nazis vinculados al ocultismo?, ¿qué es el Ojo del Pavo Real?, ¿qué misterios entraña la Calavera de Cristal?, ¿los agentes soviéticos utilizaron la parapsicología?, ¿es la disciplina arqueológica tal y como se muestra en los filmes? Por fin, aquí tenemos las respuestas a éstas y otras muchas cuestiones sobre los artefactos de Indiana Jones. Este breve ensayo rastrea en todo lo que usted necesita saber sobre la verdad histórica, cultural y técnica que se esconde...