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La existencia de canales en el Valle de Teotihuacan ha sido considerada como una clara evidencia de la intensificacion agricola durante el auge de Teotihuacan. Los restos de cultigenos, los instrumentos de trabajo y los restos de las obras agricolas no pueden ser considerados como prueba irrefutable de la practica agricola, menos aun deben ser interpretados como indicadores de intensificacion agricola. Ante la imposibilidad de hallar contextos arqueologicos agricolas en locus actioni, como y donde localizar los espacios de cultivo en el Valle de Teotihuacan en la antiguedad? En Otumba y...

China is the second-largest economy in the world, and it stands poised to become the largest. China s geopolitical power is also developing at a stunning pace. It has been predicted that China will have more impact on the world over the next 20 years than any other country. The world order as we have known it is changing, and China is becoming its leader. But, contrary to the belief that China's economic miracle is solely due to its government, the reality is that it has been fuelled by its people's pent-up ambition and entrepreneurial spirit. Private-owned companies account for about 60...