Meet the Maya astronomer who signed his 1,300-year-old math

For centuries, Maya mathematics survived without the names of the people who developed it. A damaged plaster text from Xultun, Guatemala, has now revealed one of them: **Sak Tahn Waax**, or “White-Chested Fox.” Beside a formula linking calendars and planetary cycles, an inscription effectively says, “so says Sak Tahn Waax.” **The wall text is the first known Classic-period Maya mathematical work connected to a named individual.** More than a signature, it preserves a scholar combining the 260-day ritual calendar with solar, Venus and Mars cycles through a single numerical relationship roughly 1,300 years ago. Researchers are careful about what that authorship means. Sak Tahn Waax may have devised the formula, taught it or been quoted by the person who wrote on the wall. Either way, his name was important enough to attach to the calculation. --- ## The formula survived in what looked like dirt Archaeologists first uncovered the mural-lined room at Xultun in 2010 after a looters' tunnel exposed part of the structure. The room contained painted figures and thin plaster fragments covered in tiny marks. Some initially looked like dirt or debris. Over more than a decade, researchers documented and digitally enhanced over **50 mathematical and astronomical microtexts**. Scale drawings, photographs and scans eventually exposed **11 hieroglyphs** that could be read as language rather than isolated numbers. The room appears to have been a working space, possibly connected to scribes, paper makers or a learned guild. Its walls functioned less like a monument and more like a scholar's scratchpad. The evidence includes: - **Calendar calculations**: Relationships involving the 260-day ritual count and the solar year - **Planetary cycles**: Numerical treatment of the observed periods of Venus and Mars - **Different handwriting**: Signs that more than one specialist used or copied material in the room - **A named attribution**: A phrase that ends with Sak Tahn Waax's full name That last feature is exceptional. Maya artists and sculptors sometimes signed works, but the specialists behind mathematical tables have largely remained anonymous. --- ## White-Chested Fox was playing with enormous cycles The formula relates several recurring periods through numbers that line up again after long intervals. In modern language, part of the exercise resembles finding **least common multiples** among astronomical and calendar cycles. This was not merely bookkeeping. The calculation combines observed motions in the sky with culturally meaningful units of time, producing symmetries across a single mathematical statement. Researchers see similarities between the Xultun material and tables preserved centuries later in the **Dresden Codex**, one of the oldest surviving Maya books. That raises an intriguing possibility: Sak Tahn Waax's work, or a tradition that included it, may have influenced knowledge copied into later manuscripts. The evidence does not prove a direct line from his wall to the codex. The formula could have circulated more widely, and the room may have recorded an already famous calculation. The comparison is a research lead, not a solved genealogy. --- ## A name changes how ancient science is remembered We tend to tell ancient mathematics through individuals such as Euclid, Archimedes or Aryabhata. Maya achievements are more often described collectively, partly because colonization and the destruction of books erased so much of the documentary record. Recovering one name changes the scale of the story. “The Maya” did not calculate in the abstract. Particular people observed, taught, argued, copied and experimented. The Xultun room also connects with newer ways of recovering Maya history. Satellites and lidar can [reveal cities hidden by forest](/space/satellites-revolutionizing-agriculture-wildlife-archaeology-20250920), while multispectral imaging can pull handwriting out of damaged plaster. One technology restores places; another restores a person. What remains unknown is as important as what was decoded: - **Who wrote the text**: Sak Tahn Waax may have signed it himself or been cited by another scribe - **Who used the room**: It could have been his residence, a workshop or a shared teaching space - **How far the formula travelled**: Similarities to later manuscripts do not prove direct transmission - **What the other fragments contain**: More hands and calculations remain under study The discovery does not need a claim that White-Chested Fox was a lone genius ahead of his time. Its power is simpler. A working scientist from the mid-eighth century has stepped out of a category and into history with his own name attached to his math. ## Sources - [The identification and work of an eighth-century Maya mathematician, Antiquity](https://doi.org/10.15184/aqy.2026.10378) - [Nature report on the Xultun formula and Sak Tahn Waax](https://www.nature.com/articles/d41586-026-02170-8) - [Guatemala Ministry of Culture announcement](https://guatemala.gob.gt/presentan-hallazgo-del-primer-nombre-completo-de-un-astronomo-y-matematico-identificado-en-la-region-maya/) - [Scientific American account of the decipherment](https://www.scientificamerican.com/article/we-finally-know-the-name-of-a-maya-mathematician/)