The Fibonacci sequence, such that each number is the sum of the two preceding ones, starting from 0 and 1.
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...
Everything in nature uses these numbers.
Having an artichoke for dinner tonight? Fibonacci numbers.
Pineapple for desert? Fibonacci numbers
Count the number of petals on a flower. Fibonacci numbers
Astronomer studying the galaxy or a kid who likes sea shells? Fibonacci numbers