Ella persistió: Harriet Tubman / She Persisted: Harriet Tubman

Manifest Destiny the name given in the 1840s to a belief that the coast-to-coast expansion of the United States was both inevitable and justified, regardless of the means. Standing in the way were not only the native populations, but also the descendants of Spanish settlers who had lived in the Southwest for centuries. The racist belief that white men rightfully should expand their institutions into the area brought the United States into conflict with Mexico. War was declared in 1846, and by the time the Treaty of Guadalupe Hidalgo was signed in 1848, ending the war, the US had gained...

Nos encontramos en una época crucial para la criminología, en donde su afamado estancamiento podrá quedarse en el pasado para iniciar con una revolución no vista hasta ahora en toda América Latina, donde las viejas costumbres quedarán atrás para ser reemplazadas por nuevos métodos, técnicas, conocimientos que traerán consigo la tesis de las criminologías específicas. Este texto presenta un breve acercamiento a la importancia de éstas como campos de investigación científica aplicada, de donde se obtendrán las herramientas adecuadas para el desarrollo de la ciencia.

A guide to some of the most extraordinary places, objects and sights in the cosmos, from the amazing worlds of our olar system to distant galaxies and glowing nebulae--and almost everything in between. Includes 100 objects from throughout the universe, arranged from closest to our planet to farthest away. Discover the best-kept secrets of space.

How does a frog grow? Beginning as a tiny egg and then a tadpole, a frog stays mostly in the water until it is fully grown.