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Black holes are neither holes nor black. They're invisible and packed with matter! Future astronomers will find out many more fascinating facts about these space phenomena with this intriguing book. Carefully crafted text encapsulates the most important information about black holes, such as how scientists locate them and their significance in a star's life cycle. Amazing photographs support critical concepts and inspire a true appreciation of the spectacles of space.

Charles Taylor es probablemente -junto a su amigo e interlocutor, Jürgen Habermas- uno de los filósofos más influyentes de la segunda mitad del siglo XX. Ágil, vivaz y enérgico, su pensamiento forma parte de los grandes clásicos de la historia del pensamiento filosófico occidental. Su naturaleza comprometida -que le llevó a participar en la política quebequense en su juventud- y su significativa contribución -no siempre justamente comprendida- en el debate entre comunitarismo y liberalismo en la década de los noventa contribuyeron a que Taylor fuese identificando como uno de los...

Christopher Columbus most likely wasn’t the person to discover the Americas. He wasn’t even the first European to do so! Despite that, his three trips to the Western Hemisphere led to many more European explorers heading in that direction. In this volume, readers familiar with Columbus’s travels on the Nina, Pinta, and Santa Maria can learn who Columbus was beyond his travels. Supported by full-color and historic images, interesting main content turns what readers think they know about the life of Columbus on its head while expounding on an important period in the history of the world.

Do you have what it takes to be an athlete? Readers learn about the hard work and dedication that athletes of all levels go through to be healthy and successful. Along with stunning photos and charts and riveting facts, this Spanish-translated title includes an interview with a real-life Olympic athlete and an accessible glossary, index, and list of useful sources.