scientists say antarctica used to be much further north and much warmer, moving to where it is now through continental drift. from 2011 to 2013, scientists collected fossils of frogs, water lilies, and shark and ray teeth, showing that these life forms used to live on antarctica. the frog fossils were about 40 million years old. scientists say marsupials, animals that keep their babies in pouches, could have started in south america, migrated to a warm ancient antarctica, and gone to australia from there.