Have you ever wondered why the cover of a manhole is nearly always round? Why isn’t it oval or square? Reuleaux curve based on an equilateral triangle. Reuleaux curves based on the pentagon (top) and ...

For more than five centuries, Leonardo da Vinci’s Vitruvian Man has invited admiration but also bafflement. With its harmonious symmetry of limbs outstretched in both a square and a circle, the ...

A London-based dentist has uncovered a hidden detail in Leonardo da Vinci’s famous Vitruvian Man drawing, revealing a special number connecting the iconic artwork to the human body and nature. The ...

A dentist claims he has cracked the Vitruvian Man (Picture: Getty) It is one of the most famous – and mystifying – drawings in human history. Leonardo da Vinci’s Vitruvian Man was the attempt by the ...