A London-based dentist, Dr. Rory Mac Sweeney, has published a new analysis of Leonardo da Vinci's "Vitruvian Man" (c. 1490) in the Journal of Mathematics and Arts. Using his professional training, Sweeney identifies an equilateral triangle hidden between the figure's legs, which he links to "Bonwill's triangle," a 19th-century dental principle describing optimal jaw function. He argues that Leonardo intuitively encoded geometric relationships—including a tetrahedral ratio of approximately 1.64—that anticipate modern understanding of biological architecture.
This finding matters because it reveals a previously unrecognized depth in Leonardo's multidisciplinary approach, suggesting his drawing not only solved Vitruvius's geometric challenge but also prefigured scientific principles not formally recognized until the 20th century. The study bridges Renaissance art and modern dental science, underscoring how historical masterpieces can still yield new insights through contemporary expertise. It also highlights the enduring relevance of the "Vitruvian Man" as a subject of scientific inquiry, beyond its status as an iconic Renaissance image.