Why Australia is known as Down Under?

Related questions

1. Where do most Australians live?
2. Can you move to Canada with no money?
3. How much of China is uninhabited?
4. What is the most successful multicultural country?
5. Why Australia is dangerous?
6. Is Australia a diverse country?
7. Is Australia a multicultural country?
8. What is the optimum population for Australia?
9. What is the average age to die in Australia?
10. How much of the United States is uninhabited?

Tags

1. #under
2. #southern
3. #european
4. #position
5. #explorers
6. #terra
7. #hemisphere
8. #australia
9. #discovered
10. #unknown
11. #searched
12. #discovery
13. #began
14. #before
15. #known
16. #australis
17. #incognita
18. #continent