MEXICO CITY - Archaeologists are opening a cave sealed for more than 30 years deep beneath a Mexican pyramid to look for clues about the mysterious collapse of one of ancient civilization's largest cities.
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They say new excavations begun this month could be the key to unlocking information about the sacred rituals of the people who inhabited the city, later dubbed "The Place Where Men Become Gods" by the Aztecs, who believed it was a divine site.
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