After reading the last session and the comments about Fibonacci and Phi, I discovered this, it is worth sharing.
From https://www.kickstarter.com/projects/1854671654/golden-ratio-coloring-book/description
Blue morpho butterfly sequence
Chambered nautilus shell
Butterfly infinite sequence
Fibonacci sequence shell
Golden Sequence
Golden Grid
Fibonacci icosahedron
From https://www.kickstarter.com/projects/1854671654/golden-ratio-coloring-book/description
Rafael Araujo is a Venezuelan architect and illustrator living in Caracas. For over 40 years he's been drawing the most beautiful illustrations of nature, entirely by hand. At an old drafting table he adeptly renders the mathematical brilliance of nature with just a pencil, compass, ruler and protractor.

Blue morpho butterfly sequence

Chambered nautilus shell

Butterfly infinite sequence

Fibonacci sequence shell

Rafael applies the Golden Ratio to his geometric formulas and leaves the construction lines intact to highlight this natural mathematical framework. Not surprisingly, it can take him up to 100 hours to create a single composition.

Golden Sequence

Golden Grid

Fibonacci icosahedron