Antarctica is a landmass.
Antarctica . Antarctica is a desert , with annual precipitation of only 200 mm ( 8 in ) along the coast and far less inland . Australia , sometimes known in technical contexts by the names Sahul , Australinea or Meganesia , to distinguish it from the Australian mainland , is a continent comprising mainland Australia , Tasmania , New Guinea , Seram , possibly Timor , and neighbouring islands . A desert is a barren area of land where little precipitation occurs and consequently living conditions are hostile for plant and animal life .