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...

This historical novel will fascinate young readers as they learn about Mayan customs and lifestyle. A glossary of Mayan terms and authentic drawings will help children understand this highly advanced culture. Text copyright 2004 Lectorum Publications, Inc.

Presenta los Marines de EE. UU. y presenta datos sobre sus reclutas y oficiales, incluidos, cuando lo viven y se entrenan.

¿Sabías que algunos dinosaurios eran tan grandes como un edificio de tres pisos y otros tan pequeños como un gorrión? Unos cazaban en solitario y otros en grupos organizados. ¡Algunos comían piedras! Descubre cosas asombrosas de estas increíbles criaturas. Dani, Evan y Bizcoché quieren contarte todo lo que saben de ellos. ¡Una espectacular guía con más de 100 dinosaurios!

If asked to define a forest, readers might say, "It has a lot of trees." But many places have a lot of trees. So, what makes a forest a forest? Readers discover that a forest is unlike any other biome on Earth. And a temperate forest is even more specific. Readers learn the many life cycles found within a forest and how the energy pyramid explains the numbers of forest plants and animals. In addition, readers learn by examining how forces usually considered destructive work to help forests survive. 32pp.