Archaeologists say new discoveries at a Mayan site in Guatemala point to a sophisticated and developed society much earlier than they previously believed.

The city of Cival is twice as large as first thought and may have been home to 10,000 people. Researchers say the layout of the city, its structures and artifacts dating back 2,500 years show a developed social structure.

The city is believed to have been occupied from about 500 B.C. to A.D. 100, hundreds of years earlier than other similar sites.

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Maya Artifacts Found in Guatemala (The Washington Post 5/5)
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Discovery Pushes Back Date of 'Classic' Maya (The New York Times 5/5)
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