Proceedings of the National Academy of Sciences, can be found here Image courtesy of Takeshi Inomata/University of Arizona ]]>
![Timeline of Maya Collapse Pinpointed](https://www.newhistorian.com/wp-content/uploads/2017/01/Ceibal-1.jpg)
Proceedings of the National Academy of Sciences, can be found here Image courtesy of Takeshi Inomata/University of Arizona ]]>
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