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Dentist Cracks Mystery of Da Vinci Drawing After 500 Years that Was 'Hidden in Plain Sight'

  • London-Based dentist Dr Rory Mac Sweeney identified a hidden equilateral triangle between the Vitruvian Man’s legs, explaining the proportions in da Vinci’s drawing.
  • Dr Rory Mac Sweeney uncovered a hidden equilateral triangle in da Vinci’s notes, linking it to Bonwill’s 1864 triangle concept, revealing the drawing’s geometric secret.
  • Dr Rory Mac Sweeney analyzed 100 skulls, confirming a cranial ratio of 1.64 ± 0.04 that matches the equilateral triangle ratio in the Vitruvian Man.
  • The discovery reclassifies the Vitruvian Man as both an artistic masterpiece and a scientific blueprint, highlighting da Vinci’s use of mathematical principles in human proportions.
  • This discovery suggests that Leonardo's Vitruvian Man encodes universal mathematical blueprints, potentially prompting reexamination of other Renaissance artworks for similar hidden codes.
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A London dentist may have solved an age-old mathematical riddle. He discovered a hidden triangle in Leonardo da Vinci's famous drawing 'The Vitruvian Man'.

·Amsterdam, Netherlands
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A British dentist believes to have deciphered the greatest secret behind Leonardo da Vinci's famous sketch of the "Vitruvian Man". According to his theory, the key lies in a mysterious triangle.

·Berlin, Germany
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IFLScience broke the news in on Thursday, July 3, 2025.
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