The first five numbers in the Fibonacci sequence are 1, 1, 2, 3, and 5. Each square on the clock represents one of these numbers—the side lengths of each square match these numbers.

And the sequence of monthly totals that got us there will have looked like this: The first 12 terms of the Fibonacci sequence (starting at one, not zero).

In 1611, Johannes Kepler commented on the relationship between the Fibonacci sequence and the golden ratio, though he didn't pursue this connection extensively. 4 It wasn't until the 19th century ...