RIO DE JANEIRO, BRAZIL - Machu Picchu, located about 80 kilometers from Cusco in Peru, is one of South America's most famous sites and declared a UNESCO World Heritage Site. However, determining the date of construction has been a complex undertaking, relying until now on recovered writings from the period.
New research based on bones and teeth now shows that the city's occupation may have occurred at least two decades earlier than previously thought.
Read also: Check out our coverage on Peru
"The remains show little . . .
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