Vidas que cambian vidas

¿Y si el universo no pesara nada y la materia no existiera realmente? Lo que parecería ser una duda legítima para un erudito místico de los Vedas Indios es, en cambio, un resultado embarazoso de la aplicación de la Relatividad Restringida a las observaciones obtenidas por un grupo de astrofísicos, que han medido la radiación cósmica de fondo de nuestro universo. En los albores del nuevo milenio, el satélite WMAP, más allá de proporcionarnos una medida del cosmos, nunca antes obtenida, ha creado bastantes quebraderos de cabeza respecto al concepto de universo, en el que todavía hoy ...

Regina no sabe que un simple contrato cambiará su vida para siempre, y Emma no sabe que ese contrato le traerá aquello con lo que siempre ha soñado

Animal trainers care for many different types of animals! Children will explore some of the methods that trainers use, such as affection bonding and classical and operant conditioning, while simultaneously gaining an understanding of animal instincts and animal rehabilitation. Readers are invited to learn about the variety of animals that trainers work with and are encouraged to find an area of study to focus on if they want to become an animal trainer. With stunning images, interesting facts, a glossary of useful terms, informational text, and an interview with a real-life animal trainer,...

Following the stock market crash of 1929, the United States plummeted into the Great Depression and unemployment soared. But when Franklin D. Roosevelt took office the following year, he enacted federal programs, financial regulations, and public works projects to boost the economy and put America back together. In this instructive volume, students will discover fascinating facts and little-known details about this series of reforms, called the New Deal. They'll also be able to choose from a variety of hands-on projects, from map-making to writing and performing a speech to designing and...