Crisis energética: El futuro de los combustibles fósiles (Energy Crisis: The Future of Fossil Fuels)

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...

LA ENCICLOPEDIA BRITÁNICA PARA NIÑOS. APRENDE Y DISFRUTA CON SU FORMATO REGALO. ¿Estás preparado para un viaje alucinante a través del universo? Adéntrate en el espacio con esta increíble Enciclopedia Británica, la enciclopedia más reconocida y rigurosa del mundo. ¿Sabías que el universo nació hace 13.800 millones de años? ¿O que se cree que hay 100.000 millones de galaxias? ¿Y que se han encontrado más de 4.000 exoplanetas? Descubrirás que nuestra Tierra se mueve a millones de kilómetros por hora, navegarás entre estrellas (que en realidad son bolas de fuego) y explorarás ...

In this poetic memoir, which won the Pura Belpré Author Award and was named a Walter Dean Myers Award Honoree, acclaimed author Margarita Engle tells of growing up as a child of two cultures during the Cold War. En este poético libro de memorias—ganador del premio Pura Belpré de autor, finalista del premio de YALSA de no ficción y premio de honor Walter Dean Myers—la aclamada autora Margarita Engle recrea su infancia, que transcurrió a caballo entre dos culturas durante la Guerra Fría. Margarita is a girl from two worlds. Her heart lies in Cuba, her mother’s tropical island...

It doesn't take a lot to conserve electricity. Taking action can be as simple as turning off the lights when you leave a room or using "people power" instead of cars to get around. Kids learn this and more about what they can do to help in 10 Things I Can Do to Save Electricity. Now in Spanish.

Most people think the average teenager Isn't capable of much beyond hanging with their friends and wasting time. But Zach Hunter isn't your average teenager. And he's hoping to show you that you're not either.