How far will 30 steps take you? If your steps are linear, you ll travel 30 meters. But set your sites on 30 exponential steps   you know, 1, 2, 4, 8, 16, 32, 64, 128   and you will travel over 1 billion meters (1,073,741,824 meters to be exact). That s 26 times around the earth! [...]