Dientes de animales

Animals sing or talk to communicate. They make noise for different reasons. Find out why some animals make certain noises. Paired to the fiction title So Many Classes.

Para Heinrich von Kleist (1777-1811) una novela consistía en la narración de un «acontecimiento inaudito», según la definición de Goethe. Sus personajes son héroes hamletianos sometidos a los imponderables del destino, enfrentados a situaciones límite que les plantean retos existenciales que surgen del caos. El presente volumen reúne toda la obra narrativa de Kleist: dos novelas cortas: Michael Kohlhaas y

Hurricanes takes you inside one of nature's most powerful events! Warm water and wind can quickly spin into a deadly storm. Dramatic photos show the damage huge hurricanes leave behind, and safety tips help you protect yourself from danger. Spanish Edition

Learn how technology has improved lighthouses over time with this book that features a hands-on STEAM challenge and uses real-world examples to give insight into how the engineering design process is used to solve problems.

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!