Bioética y tragedia humana (Con algunas reflexiones básicas sobre la vida y la m

When the Japanese attacked Pearl Harbor in 1941, it prompted the United States to enter World War II on multiple fronts. From Africa to Europe, the Pacific to the home front, explore the American experience of World War II through the first-hand documents of the war.

Many people depend on blue crabs from the Chesapeake Bay for their jobs. But overfishing and changes in the blue crabs’ habitats have reduced their numbers. Learn how scientists have stepped in to study these blue beauties so that they can keep a healthy crab population. Created in collaboration with the Smithsonian Institution, this Spanish book ignites a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides English language learners through every step of the engineering design process. Inspire students to pursue a STEAM career with...

It doesn't take a lot to help the animals around us. Taking action can be as simple as picking up trash or hanging birdfeeders around the neighborhood. Kids learn this and more about what they can do to help in 10 Things I Can Do to Protect Animals. Now in Spanish.

Guía teórico-práctica para los estudiantes, los técnicos, los aficionados y todas aquellas personas que quieran consultar cualquier información aeronáutica relacionada con las áreas eléctricas y electrónicas. Se divide en cinco bloques. Comienza con el estudio de los sistemas eléctricos, continua con el análisis de los instrumentos, sistemas de comunicaciones y sistemas de control y termina repasando los sistemas de navegación. Adicionalmente se incluyen unos apéndices sobre los conceptos básicos de electricidad y electrónica necesarios para avanzar en el texto sin problemas.