The Fibonacci sequence is a series where each number is the sum of the two numbers before it: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89… In nature, this sequence appears in the spiral arrangements of many plants. In a sunflower head, the seeds are packed in two sets of spirals curving in opposite directions. The counts of these spirals match consecutive Fibonacci numbers — for example, 13 and 21 seeds on this sunflower head, or higher pairs on larger heads, like 34 and 55, 55 and 89, and so on. This

What Is the Fibonacci Sequence?

Nature and Math: The Fibonacci Sequence - Herbert F. Johnson Museum of Art