Overall, one of the most elusive elements of this civilization was a819-day calendaruntil now.
John H. Linden and Victoria R. Brickerpublishedtheir findings in the journalAncient Mesoamerica.
How much larger?Forty-five yearsto be precise.

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Mars may be the kicker for the overall length.
Overall, this finding is a testament to the advanced math and thorough astronomical observations of the Maya civilization.
Two scholars from Tulane University have finally figured out how the elusive 819-day Mayan calendar works.

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