There's also (3) True north (the cold poles) aligns with magnetic north. South works too but once the world was cicumnavigated and this was understood it reinfo

There's also (3) True north (the cold poles) aligns with magnetic north. South works too but once the world was cicumnavigated and this was understood it reinforces north-south as an important direction over east-west as temperature changes along this axis but not the other.