Martin Krzywinski's transcendental tree map. The first digit of π is 3 — so 3 vertical lines divide the canvas into 4 rectangles. Each rectangle is divided by the next digit (1, 4, 1, 5 horizontal lines), each of those by the next, alternating direction every level. Digit 0 leaves its rectangle untouched. Seven levels, 20,244 digits, growing like dividing cells. We built this to understand how one rule turns a sequence of numbers into something that looks alive — the idea and the mathematics are Martin Krzywinski's and Max Cooper's.