Enciclopedia Britannica para niños - Los humanos

Explains the basic science of flight, the problems of getting vehicles into the air, different types of engines, and aircraft design, and includes instructions for making aircraft models.

Enciclopedia que descubre las curiosidades, costumbres y récords de los animales a través de espléndidas imágenes y rigurosos textos. ¿Quién es el animal más veloz?¿Cómo cazan los leones? Un libro que recoge, en definitiva, la lucha por la supervivencia en el mundo animal.

When President Thomas Jefferson bought the Louisiana Territory from cash-strapped France in 1803, he doubled the size of the United States without really knowing what he was getting. He dispatched Meriwether Lewis and William Clark and their Corps of Discovery to explore a territory that would include part or all of fifteen future states and to seek a water route to the West Coast. Westward expansion began immediately, all for the bargain price of 15 million dollars. This book richly explores this fascinating part of history.

"Esta delicada historia enfoca la relación entre dos niñas que se encuentran en un campamento veraniego y describe la cálida amistad que se desarrolla entre ambas pese a que una de ellas tiene el síndrome de Down"--P. [4] of cover.