The name Australia comes from the Latin, Terra Australia Incognito, which means the Unknown Southern Land
If you know Australia's total population, you can clearly see that the population of kangaroos in the country outnumbers that of the humans. And there are strict measures in place to check the population of the national animal
If you are looking to learn facts about Australia to impress your friends or family, note that Australian's invented a lot of things including the ultrasound, the tank, football, the refrigerator, the pre-paid postage, the BlackBox on airplanes, lawn mowers with engines, smoke alarms, asprin/aspirin, the pacemaker, and penicillin etc