Here’s what you’ll learn when you read this story:A London-based dentist spotted a “hidden in plain sight” third shape within Leonardo da Vinci’s famous Vitruvian Man drawing. That’s precisely what happened recently, when a British dentist took a look at one of the most iconic images ever drawn: Leonardo da Vinci’s Vitruvian Man. Fine Art // Getty Images Leonardo da Vinci’s Vitruvian Man (c. 1490)A familiar image to most today, Leonardo’s Vitruvian Man was drawn by the artist in 1490, after he was inspired by the writings of the Roman architect Vitruvius. Noticing the other element, however, requires going back to the work that precedes even Leonardo da Vinci: the musings of Vitruvius on the idea of the central navel. The equilateral triangle observed between the legs of Leonardo’s Vitruvian Man reaches its peak at the figure’s navel.