Antarctica will have palm trees again.

Side note:   Marsupials ruled South America (well, except for 12 foot high flightless, and very carnivorous, Terror Birds). One species managed to migrate across Antarctica (not so cold then and still attached to South America). A few of these possums apparently rafted across a narrow channel of water to Australia, which had already separated from Antarctica. Kangaroos and all the rest of the marsupials in Australia are descended from this one species of possum.