Math Photo: Spiky Symmetry

Published by MrHonner on

These cacti caught my. I can see both a dodecagon and a star in the 12-fold symmetry of the cactus in front. And to my surprise, the cactus behind it has thirteen sections!

I wonder about the range, and deviation, of the number of sections of these cacti. And what are the biological principles that govern these mathematical characteristics?

1 Comment

Sheila Krilov · November 11, 2017 at 4:21 pm

13 is a Fibonacci number and those Fibonacci numbers keep appearing in nature. I’m more surprised by the 12.

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