It divides (and protects) me from the A2K wabbit! Otherwise I'd be living in fear!
The Great Dividing Range runs like a spine inland from the east coast of Australia
Not everything to the west of it is the outback - only the outback parts. The rainfall is higher on the eastern side, while to the west there are more water shortages, rivers running dry. We've all been in drought for many a year now - with only occasional relief.
To the west there are hundreds and hundreds of miles of plains, farming and grazing land, before you get to what could possibly be called the outback - and then there's the same sort of distances heading towards the west coast.
The outback, although quite a large area - is only a small part of Australia.
Australia is roughly the same size as mainland USA - but without the population.
Why do you ask?