Definition: Antarctica's landmass includes all of South America except Chile, Argentina, and Peru; it's a land mass that is home to Antarctica, South America, Greenland, Iceland, and parts of Australia, New Zealand, and Tasmania. Antares' is an extremely cold region on the Earth's surface with temperatures dropping to -60°C (-125°F) or below in winter and at high altitudes where temperatures can plummet into sub-zero conditions.