Does Australia exist ?

Ask people who've been to Australia, find out if plane tickets say they go there. Find out specific facts about the place like population, square mileage, indigenous peoples etc. Go where it is claimed to be, Find a koala, kangaroo or other native animals that have been imported. Study weather patterns that necessitate a land m where Australia should be. There are a million and a half ways to verify that Australia exists. It would be infinitesimally less possible to verify most other things existences.