Compasses never point to the Pole,
They have their own North Star –
It’s close enough to true, on the whole,
Despite it also being quite far,
Wandering through Canadian isles
The needles off the mark.
But then, True North can sometimes be miles away
From where the gridlines hark.
I recently came across an interesting theory put forward by Lance Weaver that true polar wandering had occurred during the last ice age, putting the top of the world firmly within Greenland. I have no idea if it’s correct, and would welcome a chance to read soem acounter-arguments, but everyone seems to be ignoring it.