Buried within the Las Pinturas pyramid in San Bartolo, Guatemala, thousands of painted plaster mural fragments offer a window into ancient Maya civilization. Two of those fragments form the earliest known record of a Maya calendar, created between 300 and 200 B.C.
The fragments depict the date of “7 Deer” from the 260-day sacred calendar common across ancient Mesoamerica and still used today by indigenous communities in Guatemala and southern Mexico, archaeologist David Stuart and colleagues report April 13 in Science Advances. The calendar system’s longevity attests to the persistence of Maya intellectual culture, says Stuart, of the University of Texas at Austin.
From 400 B.C. to 100 A.D.,
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