Index
You start walking north and you walk in a straight line for two kilometers. When you look at the map, you discover that you actually walked one kilometer north and one kilometer south. How is this possible?
You were one kilometer south of the North Pole when you started walking toward the North Pole.
From the North Pole you can only walk south no matter in which direction you go.
Did you happen to see a polar bear walking south
in the vicinity?
