The reason there are underground lakes and tropical temperatures under miles of ice at the poles is because what is the POLAR area now, used to be at the equator.
Areas like North America and Canada, which used to be covered with ice, were nearer to the pole.
The Earth has ‘flipped’ somewhat, over the eons. At least that is what the physical evidence suggests.
there are underground lakes and tropical temperatures under miles of ice at the polesHuh? But anyway... the reason for "snowball Earth" in the first place...
Charles Hapgood - "Path of the Pole"