"I was on something like page 16 of Google search and found a [Lidar] survey done by a Mexican organisation for environmental monitoring," he told the BBC.
"The site contains more than 6,750 buildings of various sizes, indicating that the city at its peak must have housed more people than the entire region does today."
"Valeriana was the second-densest Mayan city, after Calakmul, and has the 'hallmarks of a capital city.'"
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