Scientists have completed an unprecedented survey of lowland Mayan civilization, revealing dozens of ancient cities in northern Guatemala, revealing the grand scale of lowland Mayan urbanism during the Late Classic period, between 650 and 800 AD.

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Scientists have completed an unprecedented survey of lowland Mayan civilization, revealing dozens of ancient cities in northern Guatemala, revealing the grand scale of lowland Mayan urbanism during the Late Classic period, between 650 and 800 AD.