the shift in the age structure manifests initially as a swelling share of adults in the working and reproductive ages and falling proportions of children and the youth.” This ‘inverted pyramid’ with ...
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5,000-Year-Old Pyramid Discovered in Peru, Linked to South America’s Oldest CivilizationOld Pyramid Discovered in Peru, Linked to South America’s Oldest Civilization A hidden treasure of the ancient world had been ...
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