Un Submarino de Aire y Otros Experimentos

Ángeles Caso rastrea la vida de todas esas mujeres excepcionales que precedieron a las creadoras del mundo actual y que sufrieron la hostilidad hacia la cultura femenina. Mujeres como Hildegarda de Bingen, consejera de papas y emperadores, o Aphra Behn, dramaturga y espía en la Inglaterra de la Restauración, pueblan estas páginas para reivindicar una vez más su lugar en la Historia.

Simple text and pictures introduce facts about snowplows and tells what they are used for and why they are important.

You think you know the story of "Goldilocks and the Three Bears"? The tale you've heard may not be just right. This retelling of the classic story, told from Baby Bear's perspective, will convince you that Goldilocks and Baby Bear (whose real name is Sam) were actually besties! This fractured fairy tale provides a fresh perspective on a well-known tale. Fully translated Spanish text.

Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!