I'm taking three things I've seen on other threads, or just plain noticed together here.
1. Looking at the positioning of the Laurentide (North American) Ice sheet, and the Eurasian Ice sheet during the most recent ice age, a glaring
issue is the relative lack of glaciers in Alaska, compared with the Eastern USA. As well as Siberia being much less glaciated than Britain.
If you just took the glaciers present at the time, and looked for a dot in the center of them, it would not be located where the present North Pole is
located. But rather closer to Southern Greenland.
2. The Haiawatha impact crater.
It hasn't been definitely dated to the Younger Dryas event, but it was a very high energy impact. Believed to be a 12 billion ton meteor. It
would have melted lots of ice very quickly, causing free water to flow at speeds and in volumes so great it could put a spinning globe off balance.
Create a lump on an otherwise symmetric spinning watermelon (not quite a sphere, but still symmetric along vertical lines.)
I could see a pole shift occurring, because the water would need more than a day to settle (meaning it would remain as a lump for multiple
revolutions/days, messing with the balance.)
3. Various ancient maps appearing to show an ice free Antarctica.
But they are mostly accurate in the areas nearest South America. An area that would have been 30 degrees further North, if the North pole
were located in Southern Greenland.
(I'll just link Doug Fisher's amazingly well researched thread for this)
It's speculative, of course. But that's what ATS is for. There are a number of possible conspiracy-related reasons for this.
Random chance is of course one of them.
Aliens wanting to permanently conceal a civilization in Antarctica would be another. Perhaps they aimed the meteor that hit Haiwatha region,
having calculated it to move the poles to perfectly center Antarctica at the South Pole. Making it possible for most of the human race
to remain un-developed with no risk of discovering any relics from the advanced civilization that (in their opinion) had gone off course culturally.
A highly developed civilization in Antarctica would be another. Perhaps they developed to the point they could leave Earth, and live in
space. Tried approaching their less developed peers around the world, but found none of them wanted that. (Or were unwilling to adopt the
cultural values required in order to handle technology responsibly.) Decided to let them be. Left Earth, and intentionally buried their
civilization to avoid the technology falling into the wrong hands.
And there could be other interesting possibilities. I'm interested to hear what other people come up with.
Could make for good fiction, or lead to new discoveries. Either way, it would be fun!