"So Says White-Chested Fox": How Multispectral Imaging Named an 8th-Century Mathematician
For over a century, historians marveled at the precision of Classic Maya mathematical astronomy—which tracked the 583.92-day synodic cycle of Venus to within two hours over 500 years—yet the individual scientists who invented those equations remained completely anonymous. That changed in 2026 with a landmark paper in Antiquity (Volume 100, Issue 413, October 2026, pp. 1369–1384) by Franco D. Rossi, David Stuart, and colleagues.
Inside Structure 10K-2 at Xultun in northeastern Guatemala—a room that functioned as an astronomical and mathematical research studio around 781 CE—researchers used multispectral imaging to read faded red-and-black bar-and-dot equations painted directly onto the plaster wall (Text 19). The calculation links the 2,920-day Earth-Venus commensuration (8 solar years of 365 days = 5 Venus cycles of 584 days) with the 780-day synodic cycle of Mars through numerical progressions that mirror a Fibonacci sequence. At the conclusion of the proof sits a startling two-glyph signature: che-he-na SAK-TAHN-wa-xi—meaning "So says Sak Tahn Waax" ("White-Chested Fox"), giving humanity the first named mathematician-astronomer of the ancient Americas.