Golden Ratio observed in human skulls

Golden Ratio observed in human skulls
Leonardo’s Vitruvian Man with Golden ratios highlighted. Credit: Modified by Rafael Tamargo

The Golden Ratio, described by Leonardo da Vinci and Luca Pacioli as the "Divine Proportion," is an infinite number often found in nature, art and mathematics. It's a pattern in pinecones, seashells, galaxies and hurricanes.

In a new study investigating whether follows the Golden Ratio (1.618 … ), Johns Hopkins researchers compared 100 to 70 skulls from six other animals, and found that the human skull dimensions followed the Golden Ratio. The skulls of less such as dogs, two kinds of monkeys, rabbits, lions and tigers, however, diverged from this ratio.

"The other mammals we surveyed actually have unique ratios that approach the Golden Ratio with increased species sophistication," says Rafael Tamargo, M.D., professor of neurosurgery at the Johns Hopkins University School of Medicine. "We believe that this finding may have important anthropological and evolutionary implications."

The researchers published their findings in the September issue of the Journal of Craniofacial Surgery.

The Golden Ratio can be calculated by taking a line and dividing it into two unequal parts, with the length of the longer part divided by the shorter length being equal to the entire length divided by the longer part. Tamargo's interest in history and anatomy led him in 2010 to publish on finding a human brain and spinal cord in the depiction of God in Michelangelo's Sistine Chapel painting.


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More information: Rafael J. Tamargo et al. Mammalian Skull Dimensions and the Golden Ratio (Φ), Journal of Craniofacial Surgery (2019). DOI: 10.1097/SCS.0000000000005610
Citation: Golden Ratio observed in human skulls (2019, October 3) retrieved 17 November 2019 from https://phys.org/news/2019-10-golden-ratio-human-skulls.html
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