El ferrocarril transcontinental (The Transcontinental Railroad)

¿Qué sabes de los dinosaurios? ¿Sabes cuál es el fósil más antiguo? ¿Conoces a Otzi, el hombre congelado de las nieves? ¿Cuáles son las maravillas de la naturaleza? ¿Te apetece recorrer el mundo en busca de tesoros escondidos? ¿Sabes distinguir una falsificación?

Las composiciones de Beethoven expresan siempre fuerza y diversidad, por eso resulta complejo resumir su originalidad y personalidad. Beethoven supo plasmar en su música los momentos más notables de su vida, los sentimientos de alegría, de sufrimiento o de amor. La confluencia de los ideales revolucionarios de la época con el carácter, apasionado y profundo, del artista desempeñó sin duda un papel fundamental en la revolución musical que representó su obra.

"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...

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.