You know once upon a time how *most* modern day land was joined together to be just one peice of land mass? It was called Gondwana land.
Anyhow, New Zealand was joined against the east side of Australia (Queensland) and the Antartic peninsula was joined to a place called Slope Point in New Zealand. (Evidence comes from type of rocks on both coasts).
Well the funny thing is, back then, a few million years before things started breaking up, there was a massive forest that ranged across New Zealand, and the Antartica (wasn't ice back then) and Australia. Well, sorry, that wasn't so funny, but here comes the funny thing: The land started to break up and thus, this massive Jurassic forest broke up and went its seperate ways. Well apparently, it took a hell of a long time for the Antartic to get to where it is now (millions of years) and then *10 million years* after Antartica is settled into the place it is today, that damn forest still grew. This is a FACT, they done some radio-carbon testing and other means, by studying the fossilised forest (petrofied wood).

My question is: WTF? How the hell does a forest grow at an area that is the coldest in the world, even back then, with no sun for 3 months of the year?!

Actually, this one's fairly simple. A forest already exists. Climate may begin to suck, but the forest itself is still there. Trees are very hardy things, no pun intended if you bothered to notice it. All a very cold climate really does is slow it down. This would also help with the lack of sun, because if a tree moves slower, it uses energy slower as well. And of course, the places being described as still growing were probably in the center of the forest itself, so that it could be more sheltered. And besides all of that, when they say "forest still growing" that really only means "this is how long a fern survived in Antarctica."

There also may have been volcanic activity beneath the landmass for some time, helping to warm it. That does often occur with any lagre moving mass of earth. And if not that, there may also have been a hot water spring, long since eradicated.

Or maybe the trees were secretly robot clones of other trees and their reserve cells could only last them for another 10 million years separated from New Zealand, the center of all the robot-tree operations.

Or maybe there was a civilization before us, and 10 million years ago they tried a beautification project in Antarctica 10 million years ago, but they all tragically died of Frantic Gripe.

There also may have been volcanic activity beneath the landmass for some time, helping to warm it. That does often occur with any lagre moving mass of earth. And if not that, there may also have been a hot water spring, long since eradicated.