Golden Ratio & Fibonacci
1, 1, 2, 3, 5, 8 — and the ratio that hides everywhere
Each term of the Fibonacci sequence is the sum of the two before it. The ratio of consecutive terms converges to φ = (1 + √5)/2 ≈ 1.618. The same φ shows up in sunflower seed spirals, pinecones, the proportions of architecture and, less reliably, in posters about it.
