El ferrocarril transcontinental (The Transcontinental Railroad)

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.

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.

l volumen incluye íntegros los poemas Canto heroico y fúnebre por el subteniente caído en Albania (1945), Sol soliarca y Monograma (ambos de 1971), además de Dignum est (1960), el gran poema del que Theodorakis realizó un extraordinario Oratorio. Completa

Spanish language edition. This spirited tribute to Old Glory will inspire readers, young and old, to take a new look at the greatest emblem of the United States of America. With patriotic verse and historical facts, THE FLAG WE LOVE explores how our flag has become an enduring part of our nation's proud history and heritage. From its earliest designs to its role in peace-time and war, the Star-Spangled Banner will take on a whole new meaning for all readers. The bold, rich illustrations by Ralph Masiello highlight significant points in history, as well as commonplace moments of American life, ...