Triceratops

Dams change the landscape, providing reservoirs of freshwater and even producing electricity. Discover the engineering behind dams.

Describes the U.S. Army Rangers, including their missions, vehicles, weapons, equipment, and duties. Written in English and Spanish.

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.

El objetivo de este libro es analizar aspectos relevantes de las conductas violentas de niños y adolescentes en diferentes con-textos, y hacerlo buscando y reforzando cuáles son los entornos que protegen a los menores de este tipo de conductas. Puede que solo lo hayamos conseguido en parte, porque se trata de un tema complejo que requiere un análisis muy amplio. El contenido de este libro nos ofrece un análisis multidisciplinar de gran interés teórico e investigador sobre cómo estudiar las conductas violentas de estos jóvenes y centrar los aspectos básicos para la prevención y su...