Today is Fibonacci Day. November 23 if written in MM/DD format recalls the #mathematician Leonardo Bonaccio of Pisa (c. 1170 - c. 1240 or 50) aka Fibonacci’s sequence (1,1,2,3…) where each number is the sum of the previous two. He used it to describe rabbit populations, but the sequence is commonly observed in nature, including in the spiral of a nautilus shell.🧵

#linocut #printmaking #mathematics #mathart #sciart #nautilus #GoldenRatio #GoldenSpiral #Fibonacci #fibonacciday2025 #FibonacciDay