Trascendiendo fronteras

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute...

Published on the occasion of the transfer of the Panama Canal from the United States to Panama, the book summarizes, with concise texts and beautiful photographs, the Canal's history, operation, maintenance and improvement, as well as the beauty and fragility of its watershed.

Section 17 (American Prehistory). President of the Section: Sergio Purin Acts of the XIVth UISPP Congress, University of Liège, Belgium, 2-8 September 2001.

¿Puede nuestra especie Homo Sapiens adaptarse a las consecuencias deslumbrantes de su éxito desde hace 40 000 años y a su ampliación sin precedentes desde hace medio siglo? No hace tanto tiempo, diversas especies humanas compartían la Tierra en tres imperios: los neandertales en Europa, los denisovanos en Asia y los sapiens en África. Intercambiaban técnicas y genes –hoy en día, la diversidad de las poblaciones se debe en parte a los genes captados por medio de hibridaciones múltiples con especies hermanas, tanto humanas como sapiens–. A continuación, poblaciones de sapiens más ...